2700 lines
83 KiB
Python
2700 lines
83 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Test script for doctest.
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"""
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import sys
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from test import test_support
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import doctest
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# NOTE: There are some additional tests relating to interaction with
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# zipimport in the test_zipimport_support test module.
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######################################################################
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## Sample Objects (used by test cases)
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######################################################################
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def sample_func(v):
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"""
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Blah blah
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>>> print sample_func(22)
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44
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Yee ha!
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"""
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return v+v
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class SampleClass:
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"""
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>>> print 1
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1
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>>> # comments get ignored. so are empty PS1 and PS2 prompts:
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>>>
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...
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Multiline example:
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>>> sc = SampleClass(3)
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>>> for i in range(10):
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... sc = sc.double()
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... print sc.get(),
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6 12 24 48 96 192 384 768 1536 3072
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"""
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def __init__(self, val):
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"""
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>>> print SampleClass(12).get()
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12
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"""
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self.val = val
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def double(self):
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"""
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>>> print SampleClass(12).double().get()
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24
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"""
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return SampleClass(self.val + self.val)
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def get(self):
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"""
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>>> print SampleClass(-5).get()
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-5
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"""
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return self.val
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def a_staticmethod(v):
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"""
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>>> print SampleClass.a_staticmethod(10)
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11
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"""
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return v+1
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a_staticmethod = staticmethod(a_staticmethod)
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def a_classmethod(cls, v):
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"""
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>>> print SampleClass.a_classmethod(10)
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12
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>>> print SampleClass(0).a_classmethod(10)
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12
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"""
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return v+2
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a_classmethod = classmethod(a_classmethod)
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a_property = property(get, doc="""
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>>> print SampleClass(22).a_property
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22
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""")
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class NestedClass:
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"""
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>>> x = SampleClass.NestedClass(5)
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>>> y = x.square()
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>>> print y.get()
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25
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"""
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def __init__(self, val=0):
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"""
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>>> print SampleClass.NestedClass().get()
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0
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"""
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self.val = val
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def square(self):
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return SampleClass.NestedClass(self.val*self.val)
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def get(self):
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return self.val
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class SampleNewStyleClass(object):
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r"""
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>>> print '1\n2\n3'
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1
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2
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3
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"""
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def __init__(self, val):
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"""
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>>> print SampleNewStyleClass(12).get()
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12
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"""
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self.val = val
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def double(self):
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"""
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>>> print SampleNewStyleClass(12).double().get()
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24
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"""
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return SampleNewStyleClass(self.val + self.val)
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def get(self):
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"""
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>>> print SampleNewStyleClass(-5).get()
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-5
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"""
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return self.val
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######################################################################
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## Fake stdin (for testing interactive debugging)
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######################################################################
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class _FakeInput:
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"""
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A fake input stream for pdb's interactive debugger. Whenever a
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line is read, print it (to simulate the user typing it), and then
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return it. The set of lines to return is specified in the
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constructor; they should not have trailing newlines.
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"""
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def __init__(self, lines):
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self.lines = lines
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def readline(self):
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line = self.lines.pop(0)
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print line
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return line+'\n'
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######################################################################
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## Test Cases
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######################################################################
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def test_Example(): r"""
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Unit tests for the `Example` class.
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Example is a simple container class that holds:
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- `source`: A source string.
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- `want`: An expected output string.
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- `exc_msg`: An expected exception message string (or None if no
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exception is expected).
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- `lineno`: A line number (within the docstring).
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- `indent`: The example's indentation in the input string.
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- `options`: An option dictionary, mapping option flags to True or
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False.
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These attributes are set by the constructor. `source` and `want` are
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required; the other attributes all have default values:
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>>> example = doctest.Example('print 1', '1\n')
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>>> (example.source, example.want, example.exc_msg,
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... example.lineno, example.indent, example.options)
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('print 1\n', '1\n', None, 0, 0, {})
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The first three attributes (`source`, `want`, and `exc_msg`) may be
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specified positionally; the remaining arguments should be specified as
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keyword arguments:
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>>> exc_msg = 'IndexError: pop from an empty list'
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>>> example = doctest.Example('[].pop()', '', exc_msg,
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... lineno=5, indent=4,
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... options={doctest.ELLIPSIS: True})
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>>> (example.source, example.want, example.exc_msg,
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... example.lineno, example.indent, example.options)
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('[].pop()\n', '', 'IndexError: pop from an empty list\n', 5, 4, {8: True})
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The constructor normalizes the `source` string to end in a newline:
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Source spans a single line: no terminating newline.
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>>> e = doctest.Example('print 1', '1\n')
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>>> e.source, e.want
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('print 1\n', '1\n')
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>>> e = doctest.Example('print 1\n', '1\n')
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>>> e.source, e.want
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('print 1\n', '1\n')
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Source spans multiple lines: require terminating newline.
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>>> e = doctest.Example('print 1;\nprint 2\n', '1\n2\n')
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>>> e.source, e.want
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('print 1;\nprint 2\n', '1\n2\n')
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>>> e = doctest.Example('print 1;\nprint 2', '1\n2\n')
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>>> e.source, e.want
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('print 1;\nprint 2\n', '1\n2\n')
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Empty source string (which should never appear in real examples)
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>>> e = doctest.Example('', '')
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>>> e.source, e.want
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('\n', '')
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The constructor normalizes the `want` string to end in a newline,
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unless it's the empty string:
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>>> e = doctest.Example('print 1', '1\n')
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>>> e.source, e.want
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('print 1\n', '1\n')
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>>> e = doctest.Example('print 1', '1')
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>>> e.source, e.want
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('print 1\n', '1\n')
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>>> e = doctest.Example('print', '')
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>>> e.source, e.want
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('print\n', '')
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The constructor normalizes the `exc_msg` string to end in a newline,
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unless it's `None`:
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Message spans one line
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>>> exc_msg = 'IndexError: pop from an empty list'
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>>> e = doctest.Example('[].pop()', '', exc_msg)
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>>> e.exc_msg
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'IndexError: pop from an empty list\n'
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>>> exc_msg = 'IndexError: pop from an empty list\n'
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>>> e = doctest.Example('[].pop()', '', exc_msg)
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>>> e.exc_msg
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'IndexError: pop from an empty list\n'
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Message spans multiple lines
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>>> exc_msg = 'ValueError: 1\n 2'
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>>> e = doctest.Example('raise ValueError("1\n 2")', '', exc_msg)
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>>> e.exc_msg
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'ValueError: 1\n 2\n'
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>>> exc_msg = 'ValueError: 1\n 2\n'
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>>> e = doctest.Example('raise ValueError("1\n 2")', '', exc_msg)
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>>> e.exc_msg
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'ValueError: 1\n 2\n'
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Empty (but non-None) exception message (which should never appear
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in real examples)
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>>> exc_msg = ''
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>>> e = doctest.Example('raise X()', '', exc_msg)
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>>> e.exc_msg
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'\n'
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Compare `Example`:
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>>> example = doctest.Example('print 1', '1\n')
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>>> same_example = doctest.Example('print 1', '1\n')
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>>> other_example = doctest.Example('print 42', '42\n')
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>>> example == same_example
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True
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>>> example != same_example
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False
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>>> hash(example) == hash(same_example)
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True
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>>> example == other_example
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False
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>>> example != other_example
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True
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"""
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def test_DocTest(): r"""
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Unit tests for the `DocTest` class.
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DocTest is a collection of examples, extracted from a docstring, along
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with information about where the docstring comes from (a name,
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filename, and line number). The docstring is parsed by the `DocTest`
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constructor:
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>>> docstring = '''
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... >>> print 12
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... 12
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...
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... Non-example text.
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...
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... >>> print 'another\example'
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... another
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... example
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... '''
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>>> globs = {} # globals to run the test in.
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>>> parser = doctest.DocTestParser()
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>>> test = parser.get_doctest(docstring, globs, 'some_test',
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... 'some_file', 20)
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>>> print test
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<DocTest some_test from some_file:20 (2 examples)>
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>>> len(test.examples)
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2
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>>> e1, e2 = test.examples
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>>> (e1.source, e1.want, e1.lineno)
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('print 12\n', '12\n', 1)
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>>> (e2.source, e2.want, e2.lineno)
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("print 'another\\example'\n", 'another\nexample\n', 6)
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Source information (name, filename, and line number) is available as
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attributes on the doctest object:
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>>> (test.name, test.filename, test.lineno)
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('some_test', 'some_file', 20)
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The line number of an example within its containing file is found by
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adding the line number of the example and the line number of its
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containing test:
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>>> test.lineno + e1.lineno
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21
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>>> test.lineno + e2.lineno
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26
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If the docstring contains inconsistant leading whitespace in the
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expected output of an example, then `DocTest` will raise a ValueError:
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>>> docstring = r'''
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... >>> print 'bad\nindentation'
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... bad
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... indentation
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... '''
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>>> parser.get_doctest(docstring, globs, 'some_test', 'filename', 0)
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Traceback (most recent call last):
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ValueError: line 4 of the docstring for some_test has inconsistent leading whitespace: 'indentation'
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If the docstring contains inconsistent leading whitespace on
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continuation lines, then `DocTest` will raise a ValueError:
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>>> docstring = r'''
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... >>> print ('bad indentation',
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... ... 2)
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... ('bad', 'indentation')
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... '''
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>>> parser.get_doctest(docstring, globs, 'some_test', 'filename', 0)
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Traceback (most recent call last):
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ValueError: line 2 of the docstring for some_test has inconsistent leading whitespace: '... 2)'
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If there's no blank space after a PS1 prompt ('>>>'), then `DocTest`
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will raise a ValueError:
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>>> docstring = '>>>print 1\n1'
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>>> parser.get_doctest(docstring, globs, 'some_test', 'filename', 0)
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Traceback (most recent call last):
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ValueError: line 1 of the docstring for some_test lacks blank after >>>: '>>>print 1'
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If there's no blank space after a PS2 prompt ('...'), then `DocTest`
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will raise a ValueError:
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>>> docstring = '>>> if 1:\n...print 1\n1'
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>>> parser.get_doctest(docstring, globs, 'some_test', 'filename', 0)
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Traceback (most recent call last):
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ValueError: line 2 of the docstring for some_test lacks blank after ...: '...print 1'
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Compare `DocTest`:
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>>> docstring = '''
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... >>> print 12
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... 12
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... '''
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>>> test = parser.get_doctest(docstring, globs, 'some_test',
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... 'some_test', 20)
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>>> same_test = parser.get_doctest(docstring, globs, 'some_test',
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... 'some_test', 20)
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>>> test == same_test
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True
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>>> test != same_test
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False
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>>> hash(test) == hash(same_test)
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True
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>>> docstring = '''
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... >>> print 42
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... 42
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... '''
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>>> other_test = parser.get_doctest(docstring, globs, 'other_test',
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... 'other_file', 10)
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>>> test == other_test
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False
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>>> test != other_test
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True
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Compare `DocTestCase`:
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>>> DocTestCase = doctest.DocTestCase
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>>> test_case = DocTestCase(test)
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>>> same_test_case = DocTestCase(same_test)
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>>> other_test_case = DocTestCase(other_test)
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>>> test_case == same_test_case
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True
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>>> test_case != same_test_case
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False
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>>> hash(test_case) == hash(same_test_case)
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True
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>>> test == other_test_case
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False
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>>> test != other_test_case
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True
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"""
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def test_DocTestFinder(): r"""
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Unit tests for the `DocTestFinder` class.
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DocTestFinder is used to extract DocTests from an object's docstring
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and the docstrings of its contained objects. It can be used with
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modules, functions, classes, methods, staticmethods, classmethods, and
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properties.
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Finding Tests in Functions
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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For a function whose docstring contains examples, DocTestFinder.find()
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will return a single test (for that function's docstring):
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>>> finder = doctest.DocTestFinder()
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We'll simulate a __file__ attr that ends in pyc:
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>>> import test.test_doctest
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>>> old = test.test_doctest.__file__
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>>> test.test_doctest.__file__ = 'test_doctest.pyc'
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>>> tests = finder.find(sample_func)
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>>> print tests # doctest: +ELLIPSIS
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[<DocTest sample_func from ...:17 (1 example)>]
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The exact name depends on how test_doctest was invoked, so allow for
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leading path components.
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>>> tests[0].filename # doctest: +ELLIPSIS
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'...test_doctest.py'
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>>> test.test_doctest.__file__ = old
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>>> e = tests[0].examples[0]
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>>> (e.source, e.want, e.lineno)
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('print sample_func(22)\n', '44\n', 3)
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By default, tests are created for objects with no docstring:
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>>> def no_docstring(v):
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... pass
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>>> finder.find(no_docstring)
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[]
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However, the optional argument `exclude_empty` to the DocTestFinder
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constructor can be used to exclude tests for objects with empty
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docstrings:
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>>> def no_docstring(v):
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... pass
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>>> excl_empty_finder = doctest.DocTestFinder(exclude_empty=True)
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>>> excl_empty_finder.find(no_docstring)
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[]
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If the function has a docstring with no examples, then a test with no
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examples is returned. (This lets `DocTestRunner` collect statistics
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about which functions have no tests -- but is that useful? And should
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an empty test also be created when there's no docstring?)
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>>> def no_examples(v):
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... ''' no doctest examples '''
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>>> finder.find(no_examples) # doctest: +ELLIPSIS
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[<DocTest no_examples from ...:1 (no examples)>]
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Finding Tests in Classes
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~~~~~~~~~~~~~~~~~~~~~~~~
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For a class, DocTestFinder will create a test for the class's
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docstring, and will recursively explore its contents, including
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methods, classmethods, staticmethods, properties, and nested classes.
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>>> finder = doctest.DocTestFinder()
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>>> tests = finder.find(SampleClass)
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>>> for t in tests:
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... print '%2s %s' % (len(t.examples), t.name)
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3 SampleClass
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3 SampleClass.NestedClass
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1 SampleClass.NestedClass.__init__
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1 SampleClass.__init__
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2 SampleClass.a_classmethod
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1 SampleClass.a_property
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1 SampleClass.a_staticmethod
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1 SampleClass.double
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1 SampleClass.get
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New-style classes are also supported:
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>>> tests = finder.find(SampleNewStyleClass)
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>>> for t in tests:
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... print '%2s %s' % (len(t.examples), t.name)
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1 SampleNewStyleClass
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1 SampleNewStyleClass.__init__
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1 SampleNewStyleClass.double
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1 SampleNewStyleClass.get
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Finding Tests in Modules
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~~~~~~~~~~~~~~~~~~~~~~~~
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For a module, DocTestFinder will create a test for the class's
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docstring, and will recursively explore its contents, including
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functions, classes, and the `__test__` dictionary, if it exists:
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>>> # A module
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>>> import types
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>>> m = types.ModuleType('some_module')
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>>> def triple(val):
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... '''
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... >>> print triple(11)
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... 33
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... '''
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... return val*3
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>>> m.__dict__.update({
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... 'sample_func': sample_func,
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... 'SampleClass': SampleClass,
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... '__doc__': '''
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... Module docstring.
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... >>> print 'module'
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... module
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... ''',
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... '__test__': {
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... 'd': '>>> print 6\n6\n>>> print 7\n7\n',
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... 'c': triple}})
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>>> finder = doctest.DocTestFinder()
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>>> # Use module=test.test_doctest, to prevent doctest from
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>>> # ignoring the objects since they weren't defined in m.
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>>> import test.test_doctest
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>>> tests = finder.find(m, module=test.test_doctest)
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>>> for t in tests:
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... print '%2s %s' % (len(t.examples), t.name)
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1 some_module
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3 some_module.SampleClass
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3 some_module.SampleClass.NestedClass
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1 some_module.SampleClass.NestedClass.__init__
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1 some_module.SampleClass.__init__
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2 some_module.SampleClass.a_classmethod
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1 some_module.SampleClass.a_property
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1 some_module.SampleClass.a_staticmethod
|
|
1 some_module.SampleClass.double
|
|
1 some_module.SampleClass.get
|
|
1 some_module.__test__.c
|
|
2 some_module.__test__.d
|
|
1 some_module.sample_func
|
|
|
|
Duplicate Removal
|
|
~~~~~~~~~~~~~~~~~
|
|
If a single object is listed twice (under different names), then tests
|
|
will only be generated for it once:
|
|
|
|
>>> from test import doctest_aliases
|
|
>>> assert doctest_aliases.TwoNames.f
|
|
>>> assert doctest_aliases.TwoNames.g
|
|
>>> tests = excl_empty_finder.find(doctest_aliases)
|
|
>>> print len(tests)
|
|
2
|
|
>>> print tests[0].name
|
|
test.doctest_aliases.TwoNames
|
|
|
|
TwoNames.f and TwoNames.g are bound to the same object.
|
|
We can't guess which will be found in doctest's traversal of
|
|
TwoNames.__dict__ first, so we have to allow for either.
|
|
|
|
>>> tests[1].name.split('.')[-1] in ['f', 'g']
|
|
True
|
|
|
|
Empty Tests
|
|
~~~~~~~~~~~
|
|
By default, an object with no doctests doesn't create any tests:
|
|
|
|
>>> tests = doctest.DocTestFinder().find(SampleClass)
|
|
>>> for t in tests:
|
|
... print '%2s %s' % (len(t.examples), t.name)
|
|
3 SampleClass
|
|
3 SampleClass.NestedClass
|
|
1 SampleClass.NestedClass.__init__
|
|
1 SampleClass.__init__
|
|
2 SampleClass.a_classmethod
|
|
1 SampleClass.a_property
|
|
1 SampleClass.a_staticmethod
|
|
1 SampleClass.double
|
|
1 SampleClass.get
|
|
|
|
By default, that excluded objects with no doctests. exclude_empty=False
|
|
tells it to include (empty) tests for objects with no doctests. This feature
|
|
is really to support backward compatibility in what doctest.master.summarize()
|
|
displays.
|
|
|
|
>>> tests = doctest.DocTestFinder(exclude_empty=False).find(SampleClass)
|
|
>>> for t in tests:
|
|
... print '%2s %s' % (len(t.examples), t.name)
|
|
3 SampleClass
|
|
3 SampleClass.NestedClass
|
|
1 SampleClass.NestedClass.__init__
|
|
0 SampleClass.NestedClass.get
|
|
0 SampleClass.NestedClass.square
|
|
1 SampleClass.__init__
|
|
2 SampleClass.a_classmethod
|
|
1 SampleClass.a_property
|
|
1 SampleClass.a_staticmethod
|
|
1 SampleClass.double
|
|
1 SampleClass.get
|
|
|
|
Turning off Recursion
|
|
~~~~~~~~~~~~~~~~~~~~~
|
|
DocTestFinder can be told not to look for tests in contained objects
|
|
using the `recurse` flag:
|
|
|
|
>>> tests = doctest.DocTestFinder(recurse=False).find(SampleClass)
|
|
>>> for t in tests:
|
|
... print '%2s %s' % (len(t.examples), t.name)
|
|
3 SampleClass
|
|
|
|
Line numbers
|
|
~~~~~~~~~~~~
|
|
DocTestFinder finds the line number of each example:
|
|
|
|
>>> def f(x):
|
|
... '''
|
|
... >>> x = 12
|
|
...
|
|
... some text
|
|
...
|
|
... >>> # examples are not created for comments & bare prompts.
|
|
... >>>
|
|
... ...
|
|
...
|
|
... >>> for x in range(10):
|
|
... ... print x,
|
|
... 0 1 2 3 4 5 6 7 8 9
|
|
... >>> x//2
|
|
... 6
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> [e.lineno for e in test.examples]
|
|
[1, 9, 12]
|
|
"""
|
|
|
|
def test_DocTestParser(): r"""
|
|
Unit tests for the `DocTestParser` class.
|
|
|
|
DocTestParser is used to parse docstrings containing doctest examples.
|
|
|
|
The `parse` method divides a docstring into examples and intervening
|
|
text:
|
|
|
|
>>> s = '''
|
|
... >>> x, y = 2, 3 # no output expected
|
|
... >>> if 1:
|
|
... ... print x
|
|
... ... print y
|
|
... 2
|
|
... 3
|
|
...
|
|
... Some text.
|
|
... >>> x+y
|
|
... 5
|
|
... '''
|
|
>>> parser = doctest.DocTestParser()
|
|
>>> for piece in parser.parse(s):
|
|
... if isinstance(piece, doctest.Example):
|
|
... print 'Example:', (piece.source, piece.want, piece.lineno)
|
|
... else:
|
|
... print ' Text:', `piece`
|
|
Text: '\n'
|
|
Example: ('x, y = 2, 3 # no output expected\n', '', 1)
|
|
Text: ''
|
|
Example: ('if 1:\n print x\n print y\n', '2\n3\n', 2)
|
|
Text: '\nSome text.\n'
|
|
Example: ('x+y\n', '5\n', 9)
|
|
Text: ''
|
|
|
|
The `get_examples` method returns just the examples:
|
|
|
|
>>> for piece in parser.get_examples(s):
|
|
... print (piece.source, piece.want, piece.lineno)
|
|
('x, y = 2, 3 # no output expected\n', '', 1)
|
|
('if 1:\n print x\n print y\n', '2\n3\n', 2)
|
|
('x+y\n', '5\n', 9)
|
|
|
|
The `get_doctest` method creates a Test from the examples, along with the
|
|
given arguments:
|
|
|
|
>>> test = parser.get_doctest(s, {}, 'name', 'filename', lineno=5)
|
|
>>> (test.name, test.filename, test.lineno)
|
|
('name', 'filename', 5)
|
|
>>> for piece in test.examples:
|
|
... print (piece.source, piece.want, piece.lineno)
|
|
('x, y = 2, 3 # no output expected\n', '', 1)
|
|
('if 1:\n print x\n print y\n', '2\n3\n', 2)
|
|
('x+y\n', '5\n', 9)
|
|
"""
|
|
|
|
class test_DocTestRunner:
|
|
def basics(): r"""
|
|
Unit tests for the `DocTestRunner` class.
|
|
|
|
DocTestRunner is used to run DocTest test cases, and to accumulate
|
|
statistics. Here's a simple DocTest case we can use:
|
|
|
|
>>> def f(x):
|
|
... '''
|
|
... >>> x = 12
|
|
... >>> print x
|
|
... 12
|
|
... >>> x//2
|
|
... 6
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
|
|
The main DocTestRunner interface is the `run` method, which runs a
|
|
given DocTest case in a given namespace (globs). It returns a tuple
|
|
`(f,t)`, where `f` is the number of failed tests and `t` is the number
|
|
of tried tests.
|
|
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=3)
|
|
|
|
If any example produces incorrect output, then the test runner reports
|
|
the failure and proceeds to the next example:
|
|
|
|
>>> def f(x):
|
|
... '''
|
|
... >>> x = 12
|
|
... >>> print x
|
|
... 14
|
|
... >>> x//2
|
|
... 6
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=True).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
Trying:
|
|
x = 12
|
|
Expecting nothing
|
|
ok
|
|
Trying:
|
|
print x
|
|
Expecting:
|
|
14
|
|
**********************************************************************
|
|
File ..., line 4, in f
|
|
Failed example:
|
|
print x
|
|
Expected:
|
|
14
|
|
Got:
|
|
12
|
|
Trying:
|
|
x//2
|
|
Expecting:
|
|
6
|
|
ok
|
|
TestResults(failed=1, attempted=3)
|
|
"""
|
|
def verbose_flag(): r"""
|
|
The `verbose` flag makes the test runner generate more detailed
|
|
output:
|
|
|
|
>>> def f(x):
|
|
... '''
|
|
... >>> x = 12
|
|
... >>> print x
|
|
... 12
|
|
... >>> x//2
|
|
... 6
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
|
|
>>> doctest.DocTestRunner(verbose=True).run(test)
|
|
Trying:
|
|
x = 12
|
|
Expecting nothing
|
|
ok
|
|
Trying:
|
|
print x
|
|
Expecting:
|
|
12
|
|
ok
|
|
Trying:
|
|
x//2
|
|
Expecting:
|
|
6
|
|
ok
|
|
TestResults(failed=0, attempted=3)
|
|
|
|
If the `verbose` flag is unspecified, then the output will be verbose
|
|
iff `-v` appears in sys.argv:
|
|
|
|
>>> # Save the real sys.argv list.
|
|
>>> old_argv = sys.argv
|
|
|
|
>>> # If -v does not appear in sys.argv, then output isn't verbose.
|
|
>>> sys.argv = ['test']
|
|
>>> doctest.DocTestRunner().run(test)
|
|
TestResults(failed=0, attempted=3)
|
|
|
|
>>> # If -v does appear in sys.argv, then output is verbose.
|
|
>>> sys.argv = ['test', '-v']
|
|
>>> doctest.DocTestRunner().run(test)
|
|
Trying:
|
|
x = 12
|
|
Expecting nothing
|
|
ok
|
|
Trying:
|
|
print x
|
|
Expecting:
|
|
12
|
|
ok
|
|
Trying:
|
|
x//2
|
|
Expecting:
|
|
6
|
|
ok
|
|
TestResults(failed=0, attempted=3)
|
|
|
|
>>> # Restore sys.argv
|
|
>>> sys.argv = old_argv
|
|
|
|
In the remaining examples, the test runner's verbosity will be
|
|
explicitly set, to ensure that the test behavior is consistent.
|
|
"""
|
|
def exceptions(): r"""
|
|
Tests of `DocTestRunner`'s exception handling.
|
|
|
|
An expected exception is specified with a traceback message. The
|
|
lines between the first line and the type/value may be omitted or
|
|
replaced with any other string:
|
|
|
|
>>> def f(x):
|
|
... '''
|
|
... >>> x = 12
|
|
... >>> print x//0
|
|
... Traceback (most recent call last):
|
|
... ZeroDivisionError: integer division or modulo by zero
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=2)
|
|
|
|
An example may not generate output before it raises an exception; if
|
|
it does, then the traceback message will not be recognized as
|
|
signaling an expected exception, so the example will be reported as an
|
|
unexpected exception:
|
|
|
|
>>> def f(x):
|
|
... '''
|
|
... >>> x = 12
|
|
... >>> print 'pre-exception output', x//0
|
|
... pre-exception output
|
|
... Traceback (most recent call last):
|
|
... ZeroDivisionError: integer division or modulo by zero
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 4, in f
|
|
Failed example:
|
|
print 'pre-exception output', x//0
|
|
Exception raised:
|
|
...
|
|
ZeroDivisionError: integer division or modulo by zero
|
|
TestResults(failed=1, attempted=2)
|
|
|
|
Exception messages may contain newlines:
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> raise ValueError, 'multi\nline\nmessage'
|
|
... Traceback (most recent call last):
|
|
... ValueError: multi
|
|
... line
|
|
... message
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=1)
|
|
|
|
If an exception is expected, but an exception with the wrong type or
|
|
message is raised, then it is reported as a failure:
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> raise ValueError, 'message'
|
|
... Traceback (most recent call last):
|
|
... ValueError: wrong message
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 3, in f
|
|
Failed example:
|
|
raise ValueError, 'message'
|
|
Expected:
|
|
Traceback (most recent call last):
|
|
ValueError: wrong message
|
|
Got:
|
|
Traceback (most recent call last):
|
|
...
|
|
ValueError: message
|
|
TestResults(failed=1, attempted=1)
|
|
|
|
However, IGNORE_EXCEPTION_DETAIL can be used to allow a mismatch in the
|
|
detail:
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> raise ValueError, 'message' #doctest: +IGNORE_EXCEPTION_DETAIL
|
|
... Traceback (most recent call last):
|
|
... ValueError: wrong message
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=1)
|
|
|
|
IGNORE_EXCEPTION_DETAIL also ignores difference in exception formatting
|
|
between Python versions. For example, in Python 3.x, the module path of
|
|
the exception is in the output, but this will fail under Python 2:
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> from httplib import HTTPException
|
|
... >>> raise HTTPException('message')
|
|
... Traceback (most recent call last):
|
|
... httplib.HTTPException: message
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 4, in f
|
|
Failed example:
|
|
raise HTTPException('message')
|
|
Expected:
|
|
Traceback (most recent call last):
|
|
httplib.HTTPException: message
|
|
Got:
|
|
Traceback (most recent call last):
|
|
...
|
|
HTTPException: message
|
|
TestResults(failed=1, attempted=2)
|
|
|
|
But in Python 2 the module path is not included, an therefore a test must look
|
|
like the following test to succeed in Python 2. But that test will fail under
|
|
Python 3.
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> from httplib import HTTPException
|
|
... >>> raise HTTPException('message')
|
|
... Traceback (most recent call last):
|
|
... HTTPException: message
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=2)
|
|
|
|
However, with IGNORE_EXCEPTION_DETAIL, the module name of the exception
|
|
(if any) will be ignored:
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> from httplib import HTTPException
|
|
... >>> raise HTTPException('message') #doctest: +IGNORE_EXCEPTION_DETAIL
|
|
... Traceback (most recent call last):
|
|
... HTTPException: message
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=2)
|
|
|
|
The module path will be completely ignored, so two different module paths will
|
|
still pass if IGNORE_EXCEPTION_DETAIL is given. This is intentional, so it can
|
|
be used when exceptions have changed module.
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> from httplib import HTTPException
|
|
... >>> raise HTTPException('message') #doctest: +IGNORE_EXCEPTION_DETAIL
|
|
... Traceback (most recent call last):
|
|
... foo.bar.HTTPException: message
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=2)
|
|
|
|
But IGNORE_EXCEPTION_DETAIL does not allow a mismatch in the exception type:
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> raise ValueError, 'message' #doctest: +IGNORE_EXCEPTION_DETAIL
|
|
... Traceback (most recent call last):
|
|
... TypeError: wrong type
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 3, in f
|
|
Failed example:
|
|
raise ValueError, 'message' #doctest: +IGNORE_EXCEPTION_DETAIL
|
|
Expected:
|
|
Traceback (most recent call last):
|
|
TypeError: wrong type
|
|
Got:
|
|
Traceback (most recent call last):
|
|
...
|
|
ValueError: message
|
|
TestResults(failed=1, attempted=1)
|
|
|
|
If an exception is raised but not expected, then it is reported as an
|
|
unexpected exception:
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> 1//0
|
|
... 0
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 3, in f
|
|
Failed example:
|
|
1//0
|
|
Exception raised:
|
|
Traceback (most recent call last):
|
|
...
|
|
ZeroDivisionError: integer division or modulo by zero
|
|
TestResults(failed=1, attempted=1)
|
|
"""
|
|
def displayhook(): r"""
|
|
Test that changing sys.displayhook doesn't matter for doctest.
|
|
|
|
>>> import sys
|
|
>>> orig_displayhook = sys.displayhook
|
|
>>> def my_displayhook(x):
|
|
... print('hi!')
|
|
>>> sys.displayhook = my_displayhook
|
|
>>> def f():
|
|
... '''
|
|
... >>> 3
|
|
... 3
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> r = doctest.DocTestRunner(verbose=False).run(test)
|
|
>>> post_displayhook = sys.displayhook
|
|
|
|
We need to restore sys.displayhook now, so that we'll be able to test
|
|
results.
|
|
|
|
>>> sys.displayhook = orig_displayhook
|
|
|
|
Ok, now we can check that everything is ok.
|
|
|
|
>>> r
|
|
TestResults(failed=0, attempted=1)
|
|
>>> post_displayhook is my_displayhook
|
|
True
|
|
"""
|
|
def optionflags(): r"""
|
|
Tests of `DocTestRunner`'s option flag handling.
|
|
|
|
Several option flags can be used to customize the behavior of the test
|
|
runner. These are defined as module constants in doctest, and passed
|
|
to the DocTestRunner constructor (multiple constants should be ORed
|
|
together).
|
|
|
|
The DONT_ACCEPT_TRUE_FOR_1 flag disables matches between True/False
|
|
and 1/0:
|
|
|
|
>>> def f(x):
|
|
... '>>> True\n1\n'
|
|
|
|
>>> # Without the flag:
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=1)
|
|
|
|
>>> # With the flag:
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> flags = doctest.DONT_ACCEPT_TRUE_FOR_1
|
|
>>> doctest.DocTestRunner(verbose=False, optionflags=flags).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 2, in f
|
|
Failed example:
|
|
True
|
|
Expected:
|
|
1
|
|
Got:
|
|
True
|
|
TestResults(failed=1, attempted=1)
|
|
|
|
The DONT_ACCEPT_BLANKLINE flag disables the match between blank lines
|
|
and the '<BLANKLINE>' marker:
|
|
|
|
>>> def f(x):
|
|
... '>>> print "a\\n\\nb"\na\n<BLANKLINE>\nb\n'
|
|
|
|
>>> # Without the flag:
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=1)
|
|
|
|
>>> # With the flag:
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> flags = doctest.DONT_ACCEPT_BLANKLINE
|
|
>>> doctest.DocTestRunner(verbose=False, optionflags=flags).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 2, in f
|
|
Failed example:
|
|
print "a\n\nb"
|
|
Expected:
|
|
a
|
|
<BLANKLINE>
|
|
b
|
|
Got:
|
|
a
|
|
<BLANKLINE>
|
|
b
|
|
TestResults(failed=1, attempted=1)
|
|
|
|
The NORMALIZE_WHITESPACE flag causes all sequences of whitespace to be
|
|
treated as equal:
|
|
|
|
>>> def f(x):
|
|
... '>>> print 1, 2, 3\n 1 2\n 3'
|
|
|
|
>>> # Without the flag:
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 2, in f
|
|
Failed example:
|
|
print 1, 2, 3
|
|
Expected:
|
|
1 2
|
|
3
|
|
Got:
|
|
1 2 3
|
|
TestResults(failed=1, attempted=1)
|
|
|
|
>>> # With the flag:
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> flags = doctest.NORMALIZE_WHITESPACE
|
|
>>> doctest.DocTestRunner(verbose=False, optionflags=flags).run(test)
|
|
TestResults(failed=0, attempted=1)
|
|
|
|
An example from the docs:
|
|
>>> print range(20) #doctest: +NORMALIZE_WHITESPACE
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
|
10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
|
|
|
|
The ELLIPSIS flag causes ellipsis marker ("...") in the expected
|
|
output to match any substring in the actual output:
|
|
|
|
>>> def f(x):
|
|
... '>>> print range(15)\n[0, 1, 2, ..., 14]\n'
|
|
|
|
>>> # Without the flag:
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 2, in f
|
|
Failed example:
|
|
print range(15)
|
|
Expected:
|
|
[0, 1, 2, ..., 14]
|
|
Got:
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
|
|
TestResults(failed=1, attempted=1)
|
|
|
|
>>> # With the flag:
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> flags = doctest.ELLIPSIS
|
|
>>> doctest.DocTestRunner(verbose=False, optionflags=flags).run(test)
|
|
TestResults(failed=0, attempted=1)
|
|
|
|
... also matches nothing:
|
|
|
|
>>> for i in range(100):
|
|
... print i**2, #doctest: +ELLIPSIS
|
|
0 1...4...9 16 ... 36 49 64 ... 9801
|
|
|
|
... can be surprising; e.g., this test passes:
|
|
|
|
>>> for i in range(21): #doctest: +ELLIPSIS
|
|
... print i,
|
|
0 1 2 ...1...2...0
|
|
|
|
Examples from the docs:
|
|
|
|
>>> print range(20) # doctest:+ELLIPSIS
|
|
[0, 1, ..., 18, 19]
|
|
|
|
>>> print range(20) # doctest: +ELLIPSIS
|
|
... # doctest: +NORMALIZE_WHITESPACE
|
|
[0, 1, ..., 18, 19]
|
|
|
|
The SKIP flag causes an example to be skipped entirely. I.e., the
|
|
example is not run. It can be useful in contexts where doctest
|
|
examples serve as both documentation and test cases, and an example
|
|
should be included for documentation purposes, but should not be
|
|
checked (e.g., because its output is random, or depends on resources
|
|
which would be unavailable.) The SKIP flag can also be used for
|
|
'commenting out' broken examples.
|
|
|
|
>>> import unavailable_resource # doctest: +SKIP
|
|
>>> unavailable_resource.do_something() # doctest: +SKIP
|
|
>>> unavailable_resource.blow_up() # doctest: +SKIP
|
|
Traceback (most recent call last):
|
|
...
|
|
UncheckedBlowUpError: Nobody checks me.
|
|
|
|
>>> import random
|
|
>>> print random.random() # doctest: +SKIP
|
|
0.721216923889
|
|
|
|
The REPORT_UDIFF flag causes failures that involve multi-line expected
|
|
and actual outputs to be displayed using a unified diff:
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> print '\n'.join('abcdefg')
|
|
... a
|
|
... B
|
|
... c
|
|
... d
|
|
... f
|
|
... g
|
|
... h
|
|
... '''
|
|
|
|
>>> # Without the flag:
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 3, in f
|
|
Failed example:
|
|
print '\n'.join('abcdefg')
|
|
Expected:
|
|
a
|
|
B
|
|
c
|
|
d
|
|
f
|
|
g
|
|
h
|
|
Got:
|
|
a
|
|
b
|
|
c
|
|
d
|
|
e
|
|
f
|
|
g
|
|
TestResults(failed=1, attempted=1)
|
|
|
|
>>> # With the flag:
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> flags = doctest.REPORT_UDIFF
|
|
>>> doctest.DocTestRunner(verbose=False, optionflags=flags).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 3, in f
|
|
Failed example:
|
|
print '\n'.join('abcdefg')
|
|
Differences (unified diff with -expected +actual):
|
|
@@ -1,7 +1,7 @@
|
|
a
|
|
-B
|
|
+b
|
|
c
|
|
d
|
|
+e
|
|
f
|
|
g
|
|
-h
|
|
TestResults(failed=1, attempted=1)
|
|
|
|
The REPORT_CDIFF flag causes failures that involve multi-line expected
|
|
and actual outputs to be displayed using a context diff:
|
|
|
|
>>> # Reuse f() from the REPORT_UDIFF example, above.
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> flags = doctest.REPORT_CDIFF
|
|
>>> doctest.DocTestRunner(verbose=False, optionflags=flags).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 3, in f
|
|
Failed example:
|
|
print '\n'.join('abcdefg')
|
|
Differences (context diff with expected followed by actual):
|
|
***************
|
|
*** 1,7 ****
|
|
a
|
|
! B
|
|
c
|
|
d
|
|
f
|
|
g
|
|
- h
|
|
--- 1,7 ----
|
|
a
|
|
! b
|
|
c
|
|
d
|
|
+ e
|
|
f
|
|
g
|
|
TestResults(failed=1, attempted=1)
|
|
|
|
|
|
The REPORT_NDIFF flag causes failures to use the difflib.Differ algorithm
|
|
used by the popular ndiff.py utility. This does intraline difference
|
|
marking, as well as interline differences.
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> print "a b c d e f g h i j k l m"
|
|
... a b c d e f g h i j k 1 m
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> flags = doctest.REPORT_NDIFF
|
|
>>> doctest.DocTestRunner(verbose=False, optionflags=flags).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 3, in f
|
|
Failed example:
|
|
print "a b c d e f g h i j k l m"
|
|
Differences (ndiff with -expected +actual):
|
|
- a b c d e f g h i j k 1 m
|
|
? ^
|
|
+ a b c d e f g h i j k l m
|
|
? + ++ ^
|
|
TestResults(failed=1, attempted=1)
|
|
|
|
The REPORT_ONLY_FIRST_FAILURE suppresses result output after the first
|
|
failing example:
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> print 1 # first success
|
|
... 1
|
|
... >>> print 2 # first failure
|
|
... 200
|
|
... >>> print 3 # second failure
|
|
... 300
|
|
... >>> print 4 # second success
|
|
... 4
|
|
... >>> print 5 # third failure
|
|
... 500
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> flags = doctest.REPORT_ONLY_FIRST_FAILURE
|
|
>>> doctest.DocTestRunner(verbose=False, optionflags=flags).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 5, in f
|
|
Failed example:
|
|
print 2 # first failure
|
|
Expected:
|
|
200
|
|
Got:
|
|
2
|
|
TestResults(failed=3, attempted=5)
|
|
|
|
However, output from `report_start` is not suppressed:
|
|
|
|
>>> doctest.DocTestRunner(verbose=True, optionflags=flags).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
Trying:
|
|
print 1 # first success
|
|
Expecting:
|
|
1
|
|
ok
|
|
Trying:
|
|
print 2 # first failure
|
|
Expecting:
|
|
200
|
|
**********************************************************************
|
|
File ..., line 5, in f
|
|
Failed example:
|
|
print 2 # first failure
|
|
Expected:
|
|
200
|
|
Got:
|
|
2
|
|
TestResults(failed=3, attempted=5)
|
|
|
|
For the purposes of REPORT_ONLY_FIRST_FAILURE, unexpected exceptions
|
|
count as failures:
|
|
|
|
>>> def f(x):
|
|
... r'''
|
|
... >>> print 1 # first success
|
|
... 1
|
|
... >>> raise ValueError(2) # first failure
|
|
... 200
|
|
... >>> print 3 # second failure
|
|
... 300
|
|
... >>> print 4 # second success
|
|
... 4
|
|
... >>> print 5 # third failure
|
|
... 500
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> flags = doctest.REPORT_ONLY_FIRST_FAILURE
|
|
>>> doctest.DocTestRunner(verbose=False, optionflags=flags).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 5, in f
|
|
Failed example:
|
|
raise ValueError(2) # first failure
|
|
Exception raised:
|
|
...
|
|
ValueError: 2
|
|
TestResults(failed=3, attempted=5)
|
|
|
|
New option flags can also be registered, via register_optionflag(). Here
|
|
we reach into doctest's internals a bit.
|
|
|
|
>>> unlikely = "UNLIKELY_OPTION_NAME"
|
|
>>> unlikely in doctest.OPTIONFLAGS_BY_NAME
|
|
False
|
|
>>> new_flag_value = doctest.register_optionflag(unlikely)
|
|
>>> unlikely in doctest.OPTIONFLAGS_BY_NAME
|
|
True
|
|
|
|
Before 2.4.4/2.5, registering a name more than once erroneously created
|
|
more than one flag value. Here we verify that's fixed:
|
|
|
|
>>> redundant_flag_value = doctest.register_optionflag(unlikely)
|
|
>>> redundant_flag_value == new_flag_value
|
|
True
|
|
|
|
Clean up.
|
|
>>> del doctest.OPTIONFLAGS_BY_NAME[unlikely]
|
|
|
|
"""
|
|
|
|
def option_directives(): r"""
|
|
Tests of `DocTestRunner`'s option directive mechanism.
|
|
|
|
Option directives can be used to turn option flags on or off for a
|
|
single example. To turn an option on for an example, follow that
|
|
example with a comment of the form ``# doctest: +OPTION``:
|
|
|
|
>>> def f(x): r'''
|
|
... >>> print range(10) # should fail: no ellipsis
|
|
... [0, 1, ..., 9]
|
|
...
|
|
... >>> print range(10) # doctest: +ELLIPSIS
|
|
... [0, 1, ..., 9]
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 2, in f
|
|
Failed example:
|
|
print range(10) # should fail: no ellipsis
|
|
Expected:
|
|
[0, 1, ..., 9]
|
|
Got:
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
|
|
TestResults(failed=1, attempted=2)
|
|
|
|
To turn an option off for an example, follow that example with a
|
|
comment of the form ``# doctest: -OPTION``:
|
|
|
|
>>> def f(x): r'''
|
|
... >>> print range(10)
|
|
... [0, 1, ..., 9]
|
|
...
|
|
... >>> # should fail: no ellipsis
|
|
... >>> print range(10) # doctest: -ELLIPSIS
|
|
... [0, 1, ..., 9]
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False,
|
|
... optionflags=doctest.ELLIPSIS).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 6, in f
|
|
Failed example:
|
|
print range(10) # doctest: -ELLIPSIS
|
|
Expected:
|
|
[0, 1, ..., 9]
|
|
Got:
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
|
|
TestResults(failed=1, attempted=2)
|
|
|
|
Option directives affect only the example that they appear with; they
|
|
do not change the options for surrounding examples:
|
|
|
|
>>> def f(x): r'''
|
|
... >>> print range(10) # Should fail: no ellipsis
|
|
... [0, 1, ..., 9]
|
|
...
|
|
... >>> print range(10) # doctest: +ELLIPSIS
|
|
... [0, 1, ..., 9]
|
|
...
|
|
... >>> print range(10) # Should fail: no ellipsis
|
|
... [0, 1, ..., 9]
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 2, in f
|
|
Failed example:
|
|
print range(10) # Should fail: no ellipsis
|
|
Expected:
|
|
[0, 1, ..., 9]
|
|
Got:
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
|
|
**********************************************************************
|
|
File ..., line 8, in f
|
|
Failed example:
|
|
print range(10) # Should fail: no ellipsis
|
|
Expected:
|
|
[0, 1, ..., 9]
|
|
Got:
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
|
|
TestResults(failed=2, attempted=3)
|
|
|
|
Multiple options may be modified by a single option directive. They
|
|
may be separated by whitespace, commas, or both:
|
|
|
|
>>> def f(x): r'''
|
|
... >>> print range(10) # Should fail
|
|
... [0, 1, ..., 9]
|
|
... >>> print range(10) # Should succeed
|
|
... ... # doctest: +ELLIPSIS +NORMALIZE_WHITESPACE
|
|
... [0, 1, ..., 9]
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 2, in f
|
|
Failed example:
|
|
print range(10) # Should fail
|
|
Expected:
|
|
[0, 1, ..., 9]
|
|
Got:
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
|
|
TestResults(failed=1, attempted=2)
|
|
|
|
>>> def f(x): r'''
|
|
... >>> print range(10) # Should fail
|
|
... [0, 1, ..., 9]
|
|
... >>> print range(10) # Should succeed
|
|
... ... # doctest: +ELLIPSIS,+NORMALIZE_WHITESPACE
|
|
... [0, 1, ..., 9]
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 2, in f
|
|
Failed example:
|
|
print range(10) # Should fail
|
|
Expected:
|
|
[0, 1, ..., 9]
|
|
Got:
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
|
|
TestResults(failed=1, attempted=2)
|
|
|
|
>>> def f(x): r'''
|
|
... >>> print range(10) # Should fail
|
|
... [0, 1, ..., 9]
|
|
... >>> print range(10) # Should succeed
|
|
... ... # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
|
|
... [0, 1, ..., 9]
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File ..., line 2, in f
|
|
Failed example:
|
|
print range(10) # Should fail
|
|
Expected:
|
|
[0, 1, ..., 9]
|
|
Got:
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
|
|
TestResults(failed=1, attempted=2)
|
|
|
|
The option directive may be put on the line following the source, as
|
|
long as a continuation prompt is used:
|
|
|
|
>>> def f(x): r'''
|
|
... >>> print range(10)
|
|
... ... # doctest: +ELLIPSIS
|
|
... [0, 1, ..., 9]
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=1)
|
|
|
|
For examples with multi-line source, the option directive may appear
|
|
at the end of any line:
|
|
|
|
>>> def f(x): r'''
|
|
... >>> for x in range(10): # doctest: +ELLIPSIS
|
|
... ... print x,
|
|
... 0 1 2 ... 9
|
|
...
|
|
... >>> for x in range(10):
|
|
... ... print x, # doctest: +ELLIPSIS
|
|
... 0 1 2 ... 9
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=2)
|
|
|
|
If more than one line of an example with multi-line source has an
|
|
option directive, then they are combined:
|
|
|
|
>>> def f(x): r'''
|
|
... Should fail (option directive not on the last line):
|
|
... >>> for x in range(10): # doctest: +ELLIPSIS
|
|
... ... print x, # doctest: +NORMALIZE_WHITESPACE
|
|
... 0 1 2...9
|
|
... '''
|
|
>>> test = doctest.DocTestFinder().find(f)[0]
|
|
>>> doctest.DocTestRunner(verbose=False).run(test)
|
|
TestResults(failed=0, attempted=1)
|
|
|
|
It is an error to have a comment of the form ``# doctest:`` that is
|
|
*not* followed by words of the form ``+OPTION`` or ``-OPTION``, where
|
|
``OPTION`` is an option that has been registered with
|
|
`register_option`:
|
|
|
|
>>> # Error: Option not registered
|
|
>>> s = '>>> print 12 #doctest: +BADOPTION'
|
|
>>> test = doctest.DocTestParser().get_doctest(s, {}, 's', 's.py', 0)
|
|
Traceback (most recent call last):
|
|
ValueError: line 1 of the doctest for s has an invalid option: '+BADOPTION'
|
|
|
|
>>> # Error: No + or - prefix
|
|
>>> s = '>>> print 12 #doctest: ELLIPSIS'
|
|
>>> test = doctest.DocTestParser().get_doctest(s, {}, 's', 's.py', 0)
|
|
Traceback (most recent call last):
|
|
ValueError: line 1 of the doctest for s has an invalid option: 'ELLIPSIS'
|
|
|
|
It is an error to use an option directive on a line that contains no
|
|
source:
|
|
|
|
>>> s = '>>> # doctest: +ELLIPSIS'
|
|
>>> test = doctest.DocTestParser().get_doctest(s, {}, 's', 's.py', 0)
|
|
Traceback (most recent call last):
|
|
ValueError: line 0 of the doctest for s has an option directive on a line with no example: '# doctest: +ELLIPSIS'
|
|
|
|
"""
|
|
|
|
def test_unicode_output(self): r"""
|
|
|
|
Check that unicode output works:
|
|
|
|
>>> u'\xe9'
|
|
u'\xe9'
|
|
|
|
If we return unicode, SpoofOut's buf variable becomes automagically
|
|
converted to unicode. This means all subsequent output becomes converted
|
|
to unicode, and if the output contains non-ascii characters that failed.
|
|
It used to be that this state change carried on between tests, meaning
|
|
tests would fail if unicode has been output previously in the testrun.
|
|
This test tests that this is no longer so:
|
|
|
|
>>> print u'abc'
|
|
abc
|
|
|
|
And then return a string with non-ascii characters:
|
|
|
|
>>> print u'\xe9'.encode('utf-8')
|
|
é
|
|
|
|
"""
|
|
|
|
|
|
def test_testsource(): r"""
|
|
Unit tests for `testsource()`.
|
|
|
|
The testsource() function takes a module and a name, finds the (first)
|
|
test with that name in that module, and converts it to a script. The
|
|
example code is converted to regular Python code. The surrounding
|
|
words and expected output are converted to comments:
|
|
|
|
>>> import test.test_doctest
|
|
>>> name = 'test.test_doctest.sample_func'
|
|
>>> print doctest.testsource(test.test_doctest, name)
|
|
# Blah blah
|
|
#
|
|
print sample_func(22)
|
|
# Expected:
|
|
## 44
|
|
#
|
|
# Yee ha!
|
|
<BLANKLINE>
|
|
|
|
>>> name = 'test.test_doctest.SampleNewStyleClass'
|
|
>>> print doctest.testsource(test.test_doctest, name)
|
|
print '1\n2\n3'
|
|
# Expected:
|
|
## 1
|
|
## 2
|
|
## 3
|
|
<BLANKLINE>
|
|
|
|
>>> name = 'test.test_doctest.SampleClass.a_classmethod'
|
|
>>> print doctest.testsource(test.test_doctest, name)
|
|
print SampleClass.a_classmethod(10)
|
|
# Expected:
|
|
## 12
|
|
print SampleClass(0).a_classmethod(10)
|
|
# Expected:
|
|
## 12
|
|
<BLANKLINE>
|
|
"""
|
|
|
|
def test_debug(): r"""
|
|
|
|
Create a docstring that we want to debug:
|
|
|
|
>>> s = '''
|
|
... >>> x = 12
|
|
... >>> print x
|
|
... 12
|
|
... '''
|
|
|
|
Create some fake stdin input, to feed to the debugger:
|
|
|
|
>>> import tempfile
|
|
>>> real_stdin = sys.stdin
|
|
>>> sys.stdin = _FakeInput(['next', 'print x', 'continue'])
|
|
|
|
Run the debugger on the docstring, and then restore sys.stdin.
|
|
|
|
>>> try: doctest.debug_src(s)
|
|
... finally: sys.stdin = real_stdin
|
|
> <string>(1)<module>()
|
|
(Pdb) next
|
|
12
|
|
--Return--
|
|
> <string>(1)<module>()->None
|
|
(Pdb) print x
|
|
12
|
|
(Pdb) continue
|
|
|
|
"""
|
|
|
|
def test_pdb_set_trace():
|
|
"""Using pdb.set_trace from a doctest.
|
|
|
|
You can use pdb.set_trace from a doctest. To do so, you must
|
|
retrieve the set_trace function from the pdb module at the time
|
|
you use it. The doctest module changes sys.stdout so that it can
|
|
capture program output. It also temporarily replaces pdb.set_trace
|
|
with a version that restores stdout. This is necessary for you to
|
|
see debugger output.
|
|
|
|
>>> doc = '''
|
|
... >>> x = 42
|
|
... >>> raise Exception('clé')
|
|
... Traceback (most recent call last):
|
|
... Exception: clé
|
|
... >>> import pdb; pdb.set_trace()
|
|
... '''
|
|
>>> parser = doctest.DocTestParser()
|
|
>>> test = parser.get_doctest(doc, {}, "foo-bär@baz", "foo-bär@baz.py", 0)
|
|
>>> runner = doctest.DocTestRunner(verbose=False)
|
|
|
|
To demonstrate this, we'll create a fake standard input that
|
|
captures our debugger input:
|
|
|
|
>>> import tempfile
|
|
>>> real_stdin = sys.stdin
|
|
>>> sys.stdin = _FakeInput([
|
|
... 'print x', # print data defined by the example
|
|
... 'continue', # stop debugging
|
|
... ''])
|
|
|
|
>>> try: runner.run(test)
|
|
... finally: sys.stdin = real_stdin
|
|
--Return--
|
|
> <doctest foo-bär@baz[2]>(1)<module>()->None
|
|
-> import pdb; pdb.set_trace()
|
|
(Pdb) print x
|
|
42
|
|
(Pdb) continue
|
|
TestResults(failed=0, attempted=3)
|
|
|
|
You can also put pdb.set_trace in a function called from a test:
|
|
|
|
>>> def calls_set_trace():
|
|
... y=2
|
|
... import pdb; pdb.set_trace()
|
|
|
|
>>> doc = '''
|
|
... >>> x=1
|
|
... >>> calls_set_trace()
|
|
... '''
|
|
>>> test = parser.get_doctest(doc, globals(), "foo-bär@baz", "foo-bär@baz.py", 0)
|
|
>>> real_stdin = sys.stdin
|
|
>>> sys.stdin = _FakeInput([
|
|
... 'print y', # print data defined in the function
|
|
... 'up', # out of function
|
|
... 'print x', # print data defined by the example
|
|
... 'continue', # stop debugging
|
|
... ''])
|
|
|
|
>>> try:
|
|
... runner.run(test)
|
|
... finally:
|
|
... sys.stdin = real_stdin
|
|
--Return--
|
|
> <doctest test.test_doctest.test_pdb_set_trace[8]>(3)calls_set_trace()->None
|
|
-> import pdb; pdb.set_trace()
|
|
(Pdb) print y
|
|
2
|
|
(Pdb) up
|
|
> <doctest foo-bär@baz[1]>(1)<module>()
|
|
-> calls_set_trace()
|
|
(Pdb) print x
|
|
1
|
|
(Pdb) continue
|
|
TestResults(failed=0, attempted=2)
|
|
|
|
During interactive debugging, source code is shown, even for
|
|
doctest examples:
|
|
|
|
>>> doc = '''
|
|
... >>> def f(x):
|
|
... ... g(x*2)
|
|
... >>> def g(x):
|
|
... ... print x+3
|
|
... ... import pdb; pdb.set_trace()
|
|
... >>> f(3)
|
|
... '''
|
|
>>> test = parser.get_doctest(doc, globals(), "foo-bär@baz", "foo-bär@baz.py", 0)
|
|
>>> real_stdin = sys.stdin
|
|
>>> sys.stdin = _FakeInput([
|
|
... 'list', # list source from example 2
|
|
... 'next', # return from g()
|
|
... 'list', # list source from example 1
|
|
... 'next', # return from f()
|
|
... 'list', # list source from example 3
|
|
... 'continue', # stop debugging
|
|
... ''])
|
|
>>> try: runner.run(test)
|
|
... finally: sys.stdin = real_stdin
|
|
... # doctest: +NORMALIZE_WHITESPACE
|
|
--Return--
|
|
> <doctest foo-bär@baz[1]>(3)g()->None
|
|
-> import pdb; pdb.set_trace()
|
|
(Pdb) list
|
|
1 def g(x):
|
|
2 print x+3
|
|
3 -> import pdb; pdb.set_trace()
|
|
[EOF]
|
|
(Pdb) next
|
|
--Return--
|
|
> <doctest foo-bär@baz[0]>(2)f()->None
|
|
-> g(x*2)
|
|
(Pdb) list
|
|
1 def f(x):
|
|
2 -> g(x*2)
|
|
[EOF]
|
|
(Pdb) next
|
|
--Return--
|
|
> <doctest foo-bär@baz[2]>(1)<module>()->None
|
|
-> f(3)
|
|
(Pdb) list
|
|
1 -> f(3)
|
|
[EOF]
|
|
(Pdb) continue
|
|
**********************************************************************
|
|
File "foo-bär@baz.py", line 7, in foo-bär@baz
|
|
Failed example:
|
|
f(3)
|
|
Expected nothing
|
|
Got:
|
|
9
|
|
TestResults(failed=1, attempted=3)
|
|
"""
|
|
|
|
def test_pdb_set_trace_nested():
|
|
"""This illustrates more-demanding use of set_trace with nested functions.
|
|
|
|
>>> class C(object):
|
|
... def calls_set_trace(self):
|
|
... y = 1
|
|
... import pdb; pdb.set_trace()
|
|
... self.f1()
|
|
... y = 2
|
|
... def f1(self):
|
|
... x = 1
|
|
... self.f2()
|
|
... x = 2
|
|
... def f2(self):
|
|
... z = 1
|
|
... z = 2
|
|
|
|
>>> calls_set_trace = C().calls_set_trace
|
|
|
|
>>> doc = '''
|
|
... >>> a = 1
|
|
... >>> calls_set_trace()
|
|
... '''
|
|
>>> parser = doctest.DocTestParser()
|
|
>>> runner = doctest.DocTestRunner(verbose=False)
|
|
>>> test = parser.get_doctest(doc, globals(), "foo-bär@baz", "foo-bär@baz.py", 0)
|
|
>>> real_stdin = sys.stdin
|
|
>>> sys.stdin = _FakeInput([
|
|
... 'print y', # print data defined in the function
|
|
... 'step', 'step', 'step', 'step', 'step', 'step', 'print z',
|
|
... 'up', 'print x',
|
|
... 'up', 'print y',
|
|
... 'up', 'print foo',
|
|
... 'continue', # stop debugging
|
|
... ''])
|
|
|
|
>>> try:
|
|
... runner.run(test)
|
|
... finally:
|
|
... sys.stdin = real_stdin
|
|
> <doctest test.test_doctest.test_pdb_set_trace_nested[0]>(5)calls_set_trace()
|
|
-> self.f1()
|
|
(Pdb) print y
|
|
1
|
|
(Pdb) step
|
|
--Call--
|
|
> <doctest test.test_doctest.test_pdb_set_trace_nested[0]>(7)f1()
|
|
-> def f1(self):
|
|
(Pdb) step
|
|
> <doctest test.test_doctest.test_pdb_set_trace_nested[0]>(8)f1()
|
|
-> x = 1
|
|
(Pdb) step
|
|
> <doctest test.test_doctest.test_pdb_set_trace_nested[0]>(9)f1()
|
|
-> self.f2()
|
|
(Pdb) step
|
|
--Call--
|
|
> <doctest test.test_doctest.test_pdb_set_trace_nested[0]>(11)f2()
|
|
-> def f2(self):
|
|
(Pdb) step
|
|
> <doctest test.test_doctest.test_pdb_set_trace_nested[0]>(12)f2()
|
|
-> z = 1
|
|
(Pdb) step
|
|
> <doctest test.test_doctest.test_pdb_set_trace_nested[0]>(13)f2()
|
|
-> z = 2
|
|
(Pdb) print z
|
|
1
|
|
(Pdb) up
|
|
> <doctest test.test_doctest.test_pdb_set_trace_nested[0]>(9)f1()
|
|
-> self.f2()
|
|
(Pdb) print x
|
|
1
|
|
(Pdb) up
|
|
> <doctest test.test_doctest.test_pdb_set_trace_nested[0]>(5)calls_set_trace()
|
|
-> self.f1()
|
|
(Pdb) print y
|
|
1
|
|
(Pdb) up
|
|
> <doctest foo-bär@baz[1]>(1)<module>()
|
|
-> calls_set_trace()
|
|
(Pdb) print foo
|
|
*** NameError: name 'foo' is not defined
|
|
(Pdb) continue
|
|
TestResults(failed=0, attempted=2)
|
|
"""
|
|
|
|
def test_DocTestSuite():
|
|
"""DocTestSuite creates a unittest test suite from a doctest.
|
|
|
|
We create a Suite by providing a module. A module can be provided
|
|
by passing a module object:
|
|
|
|
>>> import unittest
|
|
>>> import test.sample_doctest
|
|
>>> suite = doctest.DocTestSuite(test.sample_doctest)
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=9 errors=0 failures=4>
|
|
|
|
We can also supply the module by name:
|
|
|
|
>>> suite = doctest.DocTestSuite('test.sample_doctest')
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=9 errors=0 failures=4>
|
|
|
|
The module need not contain any doctest examples:
|
|
|
|
>>> suite = doctest.DocTestSuite('test.sample_doctest_no_doctests')
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=0 errors=0 failures=0>
|
|
|
|
However, if DocTestSuite finds no docstrings, it raises an error:
|
|
|
|
>>> try:
|
|
... doctest.DocTestSuite('test.sample_doctest_no_docstrings')
|
|
... except ValueError as e:
|
|
... error = e
|
|
|
|
>>> print(error.args[1])
|
|
has no docstrings
|
|
|
|
You can prevent this error by passing a DocTestFinder instance with
|
|
the `exclude_empty` keyword argument set to False:
|
|
|
|
>>> finder = doctest.DocTestFinder(exclude_empty=False)
|
|
>>> suite = doctest.DocTestSuite('test.sample_doctest_no_docstrings',
|
|
... test_finder=finder)
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=0 errors=0 failures=0>
|
|
|
|
We can use the current module:
|
|
|
|
>>> suite = test.sample_doctest.test_suite()
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=9 errors=0 failures=4>
|
|
|
|
We can supply global variables. If we pass globs, they will be
|
|
used instead of the module globals. Here we'll pass an empty
|
|
globals, triggering an extra error:
|
|
|
|
>>> suite = doctest.DocTestSuite('test.sample_doctest', globs={})
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=9 errors=0 failures=5>
|
|
|
|
Alternatively, we can provide extra globals. Here we'll make an
|
|
error go away by providing an extra global variable:
|
|
|
|
>>> suite = doctest.DocTestSuite('test.sample_doctest',
|
|
... extraglobs={'y': 1})
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=9 errors=0 failures=3>
|
|
|
|
You can pass option flags. Here we'll cause an extra error
|
|
by disabling the blank-line feature:
|
|
|
|
>>> suite = doctest.DocTestSuite('test.sample_doctest',
|
|
... optionflags=doctest.DONT_ACCEPT_BLANKLINE)
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=9 errors=0 failures=5>
|
|
|
|
You can supply setUp and tearDown functions:
|
|
|
|
>>> def setUp(t):
|
|
... import test.test_doctest
|
|
... test.test_doctest.sillySetup = True
|
|
|
|
>>> def tearDown(t):
|
|
... import test.test_doctest
|
|
... del test.test_doctest.sillySetup
|
|
|
|
Here, we installed a silly variable that the test expects:
|
|
|
|
>>> suite = doctest.DocTestSuite('test.sample_doctest',
|
|
... setUp=setUp, tearDown=tearDown)
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=9 errors=0 failures=3>
|
|
|
|
But the tearDown restores sanity:
|
|
|
|
>>> import test.test_doctest
|
|
>>> test.test_doctest.sillySetup
|
|
Traceback (most recent call last):
|
|
...
|
|
AttributeError: 'module' object has no attribute 'sillySetup'
|
|
|
|
The setUp and tearDown funtions are passed test objects. Here
|
|
we'll use the setUp function to supply the missing variable y:
|
|
|
|
>>> def setUp(test):
|
|
... test.globs['y'] = 1
|
|
|
|
>>> suite = doctest.DocTestSuite('test.sample_doctest', setUp=setUp)
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=9 errors=0 failures=3>
|
|
|
|
Here, we didn't need to use a tearDown function because we
|
|
modified the test globals, which are a copy of the
|
|
sample_doctest module dictionary. The test globals are
|
|
automatically cleared for us after a test.
|
|
"""
|
|
|
|
def test_DocFileSuite():
|
|
"""We can test tests found in text files using a DocFileSuite.
|
|
|
|
We create a suite by providing the names of one or more text
|
|
files that include examples:
|
|
|
|
>>> import unittest
|
|
>>> suite = doctest.DocFileSuite('test_doctest.txt',
|
|
... 'test_doctest2.txt',
|
|
... 'test_doctest4.txt')
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=3 errors=0 failures=3>
|
|
|
|
The test files are looked for in the directory containing the
|
|
calling module. A package keyword argument can be provided to
|
|
specify a different relative location.
|
|
|
|
>>> import unittest
|
|
>>> suite = doctest.DocFileSuite('test_doctest.txt',
|
|
... 'test_doctest2.txt',
|
|
... 'test_doctest4.txt',
|
|
... package='test')
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=3 errors=0 failures=3>
|
|
|
|
Support for using a package's __loader__.get_data() is also
|
|
provided.
|
|
|
|
>>> import unittest, pkgutil, test
|
|
>>> added_loader = False
|
|
>>> if not hasattr(test, '__loader__'):
|
|
... test.__loader__ = pkgutil.get_loader(test)
|
|
... added_loader = True
|
|
>>> try:
|
|
... suite = doctest.DocFileSuite('test_doctest.txt',
|
|
... 'test_doctest2.txt',
|
|
... 'test_doctest4.txt',
|
|
... package='test')
|
|
... suite.run(unittest.TestResult())
|
|
... finally:
|
|
... if added_loader:
|
|
... del test.__loader__
|
|
<unittest.result.TestResult run=3 errors=0 failures=3>
|
|
|
|
'/' should be used as a path separator. It will be converted
|
|
to a native separator at run time:
|
|
|
|
>>> suite = doctest.DocFileSuite('../test/test_doctest.txt')
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=1 errors=0 failures=1>
|
|
|
|
If DocFileSuite is used from an interactive session, then files
|
|
are resolved relative to the directory of sys.argv[0]:
|
|
|
|
>>> import types, os.path, test.test_doctest
|
|
>>> save_argv = sys.argv
|
|
>>> sys.argv = [test.test_doctest.__file__]
|
|
>>> suite = doctest.DocFileSuite('test_doctest.txt',
|
|
... package=types.ModuleType('__main__'))
|
|
>>> sys.argv = save_argv
|
|
|
|
By setting `module_relative=False`, os-specific paths may be
|
|
used (including absolute paths and paths relative to the
|
|
working directory):
|
|
|
|
>>> # Get the absolute path of the test package.
|
|
>>> test_doctest_path = os.path.abspath(test.test_doctest.__file__)
|
|
>>> test_pkg_path = os.path.split(test_doctest_path)[0]
|
|
|
|
>>> # Use it to find the absolute path of test_doctest.txt.
|
|
>>> test_file = os.path.join(test_pkg_path, 'test_doctest.txt')
|
|
|
|
>>> suite = doctest.DocFileSuite(test_file, module_relative=False)
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=1 errors=0 failures=1>
|
|
|
|
It is an error to specify `package` when `module_relative=False`:
|
|
|
|
>>> suite = doctest.DocFileSuite(test_file, module_relative=False,
|
|
... package='test')
|
|
Traceback (most recent call last):
|
|
ValueError: Package may only be specified for module-relative paths.
|
|
|
|
You can specify initial global variables:
|
|
|
|
>>> suite = doctest.DocFileSuite('test_doctest.txt',
|
|
... 'test_doctest2.txt',
|
|
... 'test_doctest4.txt',
|
|
... globs={'favorite_color': 'blue'})
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=3 errors=0 failures=2>
|
|
|
|
In this case, we supplied a missing favorite color. You can
|
|
provide doctest options:
|
|
|
|
>>> suite = doctest.DocFileSuite('test_doctest.txt',
|
|
... 'test_doctest2.txt',
|
|
... 'test_doctest4.txt',
|
|
... optionflags=doctest.DONT_ACCEPT_BLANKLINE,
|
|
... globs={'favorite_color': 'blue'})
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=3 errors=0 failures=3>
|
|
|
|
And, you can provide setUp and tearDown functions:
|
|
|
|
>>> def setUp(t):
|
|
... import test.test_doctest
|
|
... test.test_doctest.sillySetup = True
|
|
|
|
>>> def tearDown(t):
|
|
... import test.test_doctest
|
|
... del test.test_doctest.sillySetup
|
|
|
|
Here, we installed a silly variable that the test expects:
|
|
|
|
>>> suite = doctest.DocFileSuite('test_doctest.txt',
|
|
... 'test_doctest2.txt',
|
|
... 'test_doctest4.txt',
|
|
... setUp=setUp, tearDown=tearDown)
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=3 errors=0 failures=2>
|
|
|
|
But the tearDown restores sanity:
|
|
|
|
>>> import test.test_doctest
|
|
>>> test.test_doctest.sillySetup
|
|
Traceback (most recent call last):
|
|
...
|
|
AttributeError: 'module' object has no attribute 'sillySetup'
|
|
|
|
The setUp and tearDown funtions are passed test objects.
|
|
Here, we'll use a setUp function to set the favorite color in
|
|
test_doctest.txt:
|
|
|
|
>>> def setUp(test):
|
|
... test.globs['favorite_color'] = 'blue'
|
|
|
|
>>> suite = doctest.DocFileSuite('test_doctest.txt', setUp=setUp)
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=1 errors=0 failures=0>
|
|
|
|
Here, we didn't need to use a tearDown function because we
|
|
modified the test globals. The test globals are
|
|
automatically cleared for us after a test.
|
|
|
|
Tests in a file run using `DocFileSuite` can also access the
|
|
`__file__` global, which is set to the name of the file
|
|
containing the tests:
|
|
|
|
>>> suite = doctest.DocFileSuite('test_doctest3.txt')
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=1 errors=0 failures=0>
|
|
|
|
If the tests contain non-ASCII characters, we have to specify which
|
|
encoding the file is encoded with. We do so by using the `encoding`
|
|
parameter:
|
|
|
|
>>> suite = doctest.DocFileSuite('test_doctest.txt',
|
|
... 'test_doctest2.txt',
|
|
... 'test_doctest4.txt',
|
|
... encoding='utf-8')
|
|
>>> suite.run(unittest.TestResult())
|
|
<unittest.result.TestResult run=3 errors=0 failures=2>
|
|
|
|
"""
|
|
|
|
def test_trailing_space_in_test():
|
|
"""
|
|
Trailing spaces in expected output are significant:
|
|
|
|
>>> x, y = 'foo', ''
|
|
>>> print x, y
|
|
foo \n
|
|
"""
|
|
|
|
|
|
def test_unittest_reportflags():
|
|
"""Default unittest reporting flags can be set to control reporting
|
|
|
|
Here, we'll set the REPORT_ONLY_FIRST_FAILURE option so we see
|
|
only the first failure of each test. First, we'll look at the
|
|
output without the flag. The file test_doctest.txt file has two
|
|
tests. They both fail if blank lines are disabled:
|
|
|
|
>>> suite = doctest.DocFileSuite('test_doctest.txt',
|
|
... optionflags=doctest.DONT_ACCEPT_BLANKLINE)
|
|
>>> import unittest
|
|
>>> result = suite.run(unittest.TestResult())
|
|
>>> print result.failures[0][1] # doctest: +ELLIPSIS
|
|
Traceback ...
|
|
Failed example:
|
|
favorite_color
|
|
...
|
|
Failed example:
|
|
if 1:
|
|
...
|
|
|
|
Note that we see both failures displayed.
|
|
|
|
>>> old = doctest.set_unittest_reportflags(
|
|
... doctest.REPORT_ONLY_FIRST_FAILURE)
|
|
|
|
Now, when we run the test:
|
|
|
|
>>> result = suite.run(unittest.TestResult())
|
|
>>> print result.failures[0][1] # doctest: +ELLIPSIS
|
|
Traceback ...
|
|
Failed example:
|
|
favorite_color
|
|
Exception raised:
|
|
...
|
|
NameError: name 'favorite_color' is not defined
|
|
<BLANKLINE>
|
|
<BLANKLINE>
|
|
|
|
We get only the first failure.
|
|
|
|
If we give any reporting options when we set up the tests,
|
|
however:
|
|
|
|
>>> suite = doctest.DocFileSuite('test_doctest.txt',
|
|
... optionflags=doctest.DONT_ACCEPT_BLANKLINE | doctest.REPORT_NDIFF)
|
|
|
|
Then the default eporting options are ignored:
|
|
|
|
>>> result = suite.run(unittest.TestResult())
|
|
>>> print result.failures[0][1] # doctest: +ELLIPSIS
|
|
Traceback ...
|
|
Failed example:
|
|
favorite_color
|
|
...
|
|
Failed example:
|
|
if 1:
|
|
print 'a'
|
|
print
|
|
print 'b'
|
|
Differences (ndiff with -expected +actual):
|
|
a
|
|
- <BLANKLINE>
|
|
+
|
|
b
|
|
<BLANKLINE>
|
|
<BLANKLINE>
|
|
|
|
|
|
Test runners can restore the formatting flags after they run:
|
|
|
|
>>> ignored = doctest.set_unittest_reportflags(old)
|
|
|
|
"""
|
|
|
|
def test_testfile(): r"""
|
|
Tests for the `testfile()` function. This function runs all the
|
|
doctest examples in a given file. In its simple invokation, it is
|
|
called with the name of a file, which is taken to be relative to the
|
|
calling module. The return value is (#failures, #tests).
|
|
|
|
We don't want `-v` in sys.argv for these tests.
|
|
|
|
>>> save_argv = sys.argv
|
|
>>> if '-v' in sys.argv:
|
|
... sys.argv = [arg for arg in save_argv if arg != '-v']
|
|
|
|
|
|
>>> doctest.testfile('test_doctest.txt') # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File "...", line 6, in test_doctest.txt
|
|
Failed example:
|
|
favorite_color
|
|
Exception raised:
|
|
...
|
|
NameError: name 'favorite_color' is not defined
|
|
**********************************************************************
|
|
1 items had failures:
|
|
1 of 2 in test_doctest.txt
|
|
***Test Failed*** 1 failures.
|
|
TestResults(failed=1, attempted=2)
|
|
>>> doctest.master = None # Reset master.
|
|
|
|
(Note: we'll be clearing doctest.master after each call to
|
|
`doctest.testfile`, to suppress warnings about multiple tests with the
|
|
same name.)
|
|
|
|
Globals may be specified with the `globs` and `extraglobs` parameters:
|
|
|
|
>>> globs = {'favorite_color': 'blue'}
|
|
>>> doctest.testfile('test_doctest.txt', globs=globs)
|
|
TestResults(failed=0, attempted=2)
|
|
>>> doctest.master = None # Reset master.
|
|
|
|
>>> extraglobs = {'favorite_color': 'red'}
|
|
>>> doctest.testfile('test_doctest.txt', globs=globs,
|
|
... extraglobs=extraglobs) # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File "...", line 6, in test_doctest.txt
|
|
Failed example:
|
|
favorite_color
|
|
Expected:
|
|
'blue'
|
|
Got:
|
|
'red'
|
|
**********************************************************************
|
|
1 items had failures:
|
|
1 of 2 in test_doctest.txt
|
|
***Test Failed*** 1 failures.
|
|
TestResults(failed=1, attempted=2)
|
|
>>> doctest.master = None # Reset master.
|
|
|
|
The file may be made relative to a given module or package, using the
|
|
optional `module_relative` parameter:
|
|
|
|
>>> doctest.testfile('test_doctest.txt', globs=globs,
|
|
... module_relative='test')
|
|
TestResults(failed=0, attempted=2)
|
|
>>> doctest.master = None # Reset master.
|
|
|
|
Verbosity can be increased with the optional `verbose` parameter:
|
|
|
|
>>> doctest.testfile('test_doctest.txt', globs=globs, verbose=True)
|
|
Trying:
|
|
favorite_color
|
|
Expecting:
|
|
'blue'
|
|
ok
|
|
Trying:
|
|
if 1:
|
|
print 'a'
|
|
print
|
|
print 'b'
|
|
Expecting:
|
|
a
|
|
<BLANKLINE>
|
|
b
|
|
ok
|
|
1 items passed all tests:
|
|
2 tests in test_doctest.txt
|
|
2 tests in 1 items.
|
|
2 passed and 0 failed.
|
|
Test passed.
|
|
TestResults(failed=0, attempted=2)
|
|
>>> doctest.master = None # Reset master.
|
|
|
|
The name of the test may be specified with the optional `name`
|
|
parameter:
|
|
|
|
>>> doctest.testfile('test_doctest.txt', name='newname')
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File "...", line 6, in newname
|
|
...
|
|
TestResults(failed=1, attempted=2)
|
|
>>> doctest.master = None # Reset master.
|
|
|
|
The summary report may be suppressed with the optional `report`
|
|
parameter:
|
|
|
|
>>> doctest.testfile('test_doctest.txt', report=False)
|
|
... # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File "...", line 6, in test_doctest.txt
|
|
Failed example:
|
|
favorite_color
|
|
Exception raised:
|
|
...
|
|
NameError: name 'favorite_color' is not defined
|
|
TestResults(failed=1, attempted=2)
|
|
>>> doctest.master = None # Reset master.
|
|
|
|
The optional keyword argument `raise_on_error` can be used to raise an
|
|
exception on the first error (which may be useful for postmortem
|
|
debugging):
|
|
|
|
>>> doctest.testfile('test_doctest.txt', raise_on_error=True)
|
|
... # doctest: +ELLIPSIS
|
|
Traceback (most recent call last):
|
|
UnexpectedException: ...
|
|
>>> doctest.master = None # Reset master.
|
|
|
|
If the tests contain non-ASCII characters, the tests might fail, since
|
|
it's unknown which encoding is used. The encoding can be specified
|
|
using the optional keyword argument `encoding`:
|
|
|
|
>>> doctest.testfile('test_doctest4.txt') # doctest: +ELLIPSIS
|
|
**********************************************************************
|
|
File "...", line 7, in test_doctest4.txt
|
|
Failed example:
|
|
u'...'
|
|
Expected:
|
|
u'f\xf6\xf6'
|
|
Got:
|
|
u'f\xc3\xb6\xc3\xb6'
|
|
**********************************************************************
|
|
...
|
|
**********************************************************************
|
|
1 items had failures:
|
|
2 of 4 in test_doctest4.txt
|
|
***Test Failed*** 2 failures.
|
|
TestResults(failed=2, attempted=4)
|
|
>>> doctest.master = None # Reset master.
|
|
|
|
>>> doctest.testfile('test_doctest4.txt', encoding='utf-8')
|
|
TestResults(failed=0, attempted=4)
|
|
>>> doctest.master = None # Reset master.
|
|
|
|
Switch the module encoding to 'utf-8' to test the verbose output without
|
|
bothering with the current sys.stdout encoding.
|
|
|
|
>>> doctest._encoding, saved_encoding = 'utf-8', doctest._encoding
|
|
>>> doctest.testfile('test_doctest4.txt', encoding='utf-8', verbose=True)
|
|
Trying:
|
|
u'föö'
|
|
Expecting:
|
|
u'f\xf6\xf6'
|
|
ok
|
|
Trying:
|
|
u'bąr'
|
|
Expecting:
|
|
u'b\u0105r'
|
|
ok
|
|
Trying:
|
|
'föö'
|
|
Expecting:
|
|
'f\xc3\xb6\xc3\xb6'
|
|
ok
|
|
Trying:
|
|
'bąr'
|
|
Expecting:
|
|
'b\xc4\x85r'
|
|
ok
|
|
1 items passed all tests:
|
|
4 tests in test_doctest4.txt
|
|
4 tests in 1 items.
|
|
4 passed and 0 failed.
|
|
Test passed.
|
|
TestResults(failed=0, attempted=4)
|
|
>>> doctest._encoding = saved_encoding
|
|
>>> doctest.master = None # Reset master.
|
|
>>> sys.argv = save_argv
|
|
"""
|
|
|
|
# old_test1, ... used to live in doctest.py, but cluttered it. Note
|
|
# that these use the deprecated doctest.Tester, so should go away (or
|
|
# be rewritten) someday.
|
|
|
|
def old_test1(): r"""
|
|
>>> from doctest import Tester
|
|
>>> t = Tester(globs={'x': 42}, verbose=0)
|
|
>>> t.runstring(r'''
|
|
... >>> x = x * 2
|
|
... >>> print x
|
|
... 42
|
|
... ''', 'XYZ')
|
|
**********************************************************************
|
|
Line 3, in XYZ
|
|
Failed example:
|
|
print x
|
|
Expected:
|
|
42
|
|
Got:
|
|
84
|
|
TestResults(failed=1, attempted=2)
|
|
>>> t.runstring(">>> x = x * 2\n>>> print x\n84\n", 'example2')
|
|
TestResults(failed=0, attempted=2)
|
|
>>> t.summarize()
|
|
**********************************************************************
|
|
1 items had failures:
|
|
1 of 2 in XYZ
|
|
***Test Failed*** 1 failures.
|
|
TestResults(failed=1, attempted=4)
|
|
>>> t.summarize(verbose=1)
|
|
1 items passed all tests:
|
|
2 tests in example2
|
|
**********************************************************************
|
|
1 items had failures:
|
|
1 of 2 in XYZ
|
|
4 tests in 2 items.
|
|
3 passed and 1 failed.
|
|
***Test Failed*** 1 failures.
|
|
TestResults(failed=1, attempted=4)
|
|
"""
|
|
|
|
def old_test2(): r"""
|
|
>>> from doctest import Tester
|
|
>>> t = Tester(globs={}, verbose=1)
|
|
>>> test = r'''
|
|
... # just an example
|
|
... >>> x = 1 + 2
|
|
... >>> x
|
|
... 3
|
|
... '''
|
|
>>> t.runstring(test, "Example")
|
|
Running string Example
|
|
Trying:
|
|
x = 1 + 2
|
|
Expecting nothing
|
|
ok
|
|
Trying:
|
|
x
|
|
Expecting:
|
|
3
|
|
ok
|
|
0 of 2 examples failed in string Example
|
|
TestResults(failed=0, attempted=2)
|
|
"""
|
|
|
|
def old_test3(): r"""
|
|
>>> from doctest import Tester
|
|
>>> t = Tester(globs={}, verbose=0)
|
|
>>> def _f():
|
|
... '''Trivial docstring example.
|
|
... >>> assert 2 == 2
|
|
... '''
|
|
... return 32
|
|
...
|
|
>>> t.rundoc(_f) # expect 0 failures in 1 example
|
|
TestResults(failed=0, attempted=1)
|
|
"""
|
|
|
|
def old_test4(): """
|
|
>>> import types
|
|
>>> m1 = types.ModuleType('_m1')
|
|
>>> m2 = types.ModuleType('_m2')
|
|
>>> test_data = \"""
|
|
... def _f():
|
|
... '''>>> assert 1 == 1
|
|
... '''
|
|
... def g():
|
|
... '''>>> assert 2 != 1
|
|
... '''
|
|
... class H:
|
|
... '''>>> assert 2 > 1
|
|
... '''
|
|
... def bar(self):
|
|
... '''>>> assert 1 < 2
|
|
... '''
|
|
... \"""
|
|
>>> exec test_data in m1.__dict__
|
|
>>> exec test_data in m2.__dict__
|
|
>>> m1.__dict__.update({"f2": m2._f, "g2": m2.g, "h2": m2.H})
|
|
|
|
Tests that objects outside m1 are excluded:
|
|
|
|
>>> from doctest import Tester
|
|
>>> t = Tester(globs={}, verbose=0)
|
|
>>> t.rundict(m1.__dict__, "rundict_test", m1) # f2 and g2 and h2 skipped
|
|
TestResults(failed=0, attempted=4)
|
|
|
|
Once more, not excluding stuff outside m1:
|
|
|
|
>>> t = Tester(globs={}, verbose=0)
|
|
>>> t.rundict(m1.__dict__, "rundict_test_pvt") # None are skipped.
|
|
TestResults(failed=0, attempted=8)
|
|
|
|
The exclusion of objects from outside the designated module is
|
|
meant to be invoked automagically by testmod.
|
|
|
|
>>> doctest.testmod(m1, verbose=False)
|
|
TestResults(failed=0, attempted=4)
|
|
"""
|
|
|
|
######################################################################
|
|
## Main
|
|
######################################################################
|
|
|
|
def test_main():
|
|
# Check the doctest cases in doctest itself:
|
|
test_support.run_doctest(doctest, verbosity=True)
|
|
|
|
from test import test_doctest
|
|
|
|
# Ignore all warnings about the use of class Tester in this module.
|
|
deprecations = [("class Tester is deprecated", DeprecationWarning)]
|
|
if sys.py3kwarning:
|
|
deprecations += [("backquote not supported", SyntaxWarning),
|
|
("execfile.. not supported", DeprecationWarning)]
|
|
with test_support.check_warnings(*deprecations):
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# Check the doctest cases defined here:
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test_support.run_doctest(test_doctest, verbosity=True)
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|
|
|
import sys
|
|
def test_coverage(coverdir):
|
|
trace = test_support.import_module('trace')
|
|
tracer = trace.Trace(ignoredirs=[sys.prefix, sys.exec_prefix,],
|
|
trace=0, count=1)
|
|
tracer.run('reload(doctest); test_main()')
|
|
r = tracer.results()
|
|
print 'Writing coverage results...'
|
|
r.write_results(show_missing=True, summary=True,
|
|
coverdir=coverdir)
|
|
|
|
if __name__ == '__main__':
|
|
if '-c' in sys.argv:
|
|
test_coverage('/tmp/doctest.cover')
|
|
else:
|
|
test_main()
|