mirror of https://github.com/python/cpython
1256 lines
49 KiB
Python
1256 lines
49 KiB
Python
"""Test case implementation"""
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import sys
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import functools
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import difflib
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import pprint
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import re
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import warnings
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import collections
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from . import result
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from .util import (strclass, safe_repr, sorted_list_difference,
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unorderable_list_difference)
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__unittest = True
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DIFF_OMITTED = ('\nDiff is %s characters long. '
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'Set self.maxDiff to None to see it.')
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class SkipTest(Exception):
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"""
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Raise this exception in a test to skip it.
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Usually you can use TestResult.skip() or one of the skipping decorators
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instead of raising this directly.
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"""
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class _ExpectedFailure(Exception):
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"""
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Raise this when a test is expected to fail.
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This is an implementation detail.
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"""
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def __init__(self, exc_info):
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super(_ExpectedFailure, self).__init__()
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self.exc_info = exc_info
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class _UnexpectedSuccess(Exception):
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"""
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The test was supposed to fail, but it didn't!
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"""
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class _Outcome(object):
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def __init__(self):
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self.success = True
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self.skipped = None
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self.unexpectedSuccess = None
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self.expectedFailure = None
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self.errors = []
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self.failures = []
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def _id(obj):
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return obj
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def skip(reason):
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"""
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Unconditionally skip a test.
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"""
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def decorator(test_item):
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if not (isinstance(test_item, type) and issubclass(test_item, TestCase)):
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@functools.wraps(test_item)
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def skip_wrapper(*args, **kwargs):
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raise SkipTest(reason)
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test_item = skip_wrapper
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test_item.__unittest_skip__ = True
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test_item.__unittest_skip_why__ = reason
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return test_item
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return decorator
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def skipIf(condition, reason):
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"""
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Skip a test if the condition is true.
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"""
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if condition:
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return skip(reason)
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return _id
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def skipUnless(condition, reason):
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"""
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Skip a test unless the condition is true.
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"""
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if not condition:
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return skip(reason)
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return _id
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def expectedFailure(func):
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@functools.wraps(func)
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def wrapper(*args, **kwargs):
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try:
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func(*args, **kwargs)
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except Exception:
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raise _ExpectedFailure(sys.exc_info())
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raise _UnexpectedSuccess
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return wrapper
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class _AssertRaisesBaseContext(object):
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def __init__(self, expected, test_case, callable_obj=None,
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expected_regex=None):
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self.expected = expected
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self.failureException = test_case.failureException
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if callable_obj is not None:
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try:
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self.obj_name = callable_obj.__name__
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except AttributeError:
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self.obj_name = str(callable_obj)
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else:
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self.obj_name = None
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if isinstance(expected_regex, (bytes, str)):
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expected_regex = re.compile(expected_regex)
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self.expected_regex = expected_regex
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class _AssertRaisesContext(_AssertRaisesBaseContext):
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"""A context manager used to implement TestCase.assertRaises* methods."""
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_value, tb):
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if exc_type is None:
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try:
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exc_name = self.expected.__name__
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except AttributeError:
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exc_name = str(self.expected)
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if self.obj_name:
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raise self.failureException("{0} not raised by {1}"
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.format(exc_name, self.obj_name))
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else:
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raise self.failureException("{0} not raised"
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.format(exc_name))
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if not issubclass(exc_type, self.expected):
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# let unexpected exceptions pass through
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return False
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# store exception, without traceback, for later retrieval
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self.exception = exc_value.with_traceback(None)
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if self.expected_regex is None:
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return True
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expected_regex = self.expected_regex
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if not expected_regex.search(str(exc_value)):
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raise self.failureException('"%s" does not match "%s"' %
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(expected_regex.pattern, str(exc_value)))
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return True
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class _AssertWarnsContext(_AssertRaisesBaseContext):
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"""A context manager used to implement TestCase.assertWarns* methods."""
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def __enter__(self):
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# The __warningregistry__'s need to be in a pristine state for tests
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# to work properly.
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for v in sys.modules.values():
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if getattr(v, '__warningregistry__', None):
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v.__warningregistry__ = {}
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self.warnings_manager = warnings.catch_warnings(record=True)
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self.warnings = self.warnings_manager.__enter__()
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warnings.simplefilter("always", self.expected)
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return self
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def __exit__(self, exc_type, exc_value, tb):
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self.warnings_manager.__exit__(exc_type, exc_value, tb)
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if exc_type is not None:
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# let unexpected exceptions pass through
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return
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try:
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exc_name = self.expected.__name__
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except AttributeError:
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exc_name = str(self.expected)
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first_matching = None
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for m in self.warnings:
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w = m.message
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if not isinstance(w, self.expected):
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continue
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if first_matching is None:
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first_matching = w
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if (self.expected_regex is not None and
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not self.expected_regex.search(str(w))):
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continue
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# store warning for later retrieval
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self.warning = w
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self.filename = m.filename
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self.lineno = m.lineno
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return
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# Now we simply try to choose a helpful failure message
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if first_matching is not None:
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raise self.failureException('"%s" does not match "%s"' %
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(self.expected_regex.pattern, str(first_matching)))
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if self.obj_name:
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raise self.failureException("{0} not triggered by {1}"
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.format(exc_name, self.obj_name))
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else:
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raise self.failureException("{0} not triggered"
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.format(exc_name))
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class _TypeEqualityDict(object):
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def __init__(self, testcase):
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self.testcase = testcase
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self._store = {}
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def __setitem__(self, key, value):
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self._store[key] = value
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def __getitem__(self, key):
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value = self._store[key]
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if isinstance(value, str):
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return getattr(self.testcase, value)
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return value
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def get(self, key, default=None):
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if key in self._store:
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return self[key]
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return default
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class TestCase(object):
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"""A class whose instances are single test cases.
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By default, the test code itself should be placed in a method named
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'runTest'.
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If the fixture may be used for many test cases, create as
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many test methods as are needed. When instantiating such a TestCase
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subclass, specify in the constructor arguments the name of the test method
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that the instance is to execute.
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Test authors should subclass TestCase for their own tests. Construction
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and deconstruction of the test's environment ('fixture') can be
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implemented by overriding the 'setUp' and 'tearDown' methods respectively.
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If it is necessary to override the __init__ method, the base class
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__init__ method must always be called. It is important that subclasses
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should not change the signature of their __init__ method, since instances
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of the classes are instantiated automatically by parts of the framework
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in order to be run.
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"""
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# This attribute determines which exception will be raised when
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# the instance's assertion methods fail; test methods raising this
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# exception will be deemed to have 'failed' rather than 'errored'
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failureException = AssertionError
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# This attribute determines whether long messages (including repr of
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# objects used in assert methods) will be printed on failure in *addition*
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# to any explicit message passed.
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longMessage = True
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# This attribute sets the maximum length of a diff in failure messages
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# by assert methods using difflib. It is looked up as an instance attribute
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# so can be configured by individual tests if required.
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maxDiff = 80*8
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# Attribute used by TestSuite for classSetUp
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_classSetupFailed = False
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def __init__(self, methodName='runTest'):
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"""Create an instance of the class that will use the named test
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method when executed. Raises a ValueError if the instance does
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not have a method with the specified name.
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"""
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self._testMethodName = methodName
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self._outcomeForDoCleanups = None
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try:
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testMethod = getattr(self, methodName)
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except AttributeError:
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raise ValueError("no such test method in %s: %s" %
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(self.__class__, methodName))
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self._testMethodDoc = testMethod.__doc__
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self._cleanups = []
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# Map types to custom assertEqual functions that will compare
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# instances of said type in more detail to generate a more useful
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# error message.
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self._type_equality_funcs = _TypeEqualityDict(self)
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self.addTypeEqualityFunc(dict, 'assertDictEqual')
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self.addTypeEqualityFunc(list, 'assertListEqual')
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self.addTypeEqualityFunc(tuple, 'assertTupleEqual')
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self.addTypeEqualityFunc(set, 'assertSetEqual')
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self.addTypeEqualityFunc(frozenset, 'assertSetEqual')
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self.addTypeEqualityFunc(str, 'assertMultiLineEqual')
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def addTypeEqualityFunc(self, typeobj, function):
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"""Add a type specific assertEqual style function to compare a type.
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This method is for use by TestCase subclasses that need to register
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their own type equality functions to provide nicer error messages.
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Args:
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typeobj: The data type to call this function on when both values
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are of the same type in assertEqual().
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function: The callable taking two arguments and an optional
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msg= argument that raises self.failureException with a
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useful error message when the two arguments are not equal.
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"""
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self._type_equality_funcs[typeobj] = function
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def addCleanup(self, function, *args, **kwargs):
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"""Add a function, with arguments, to be called when the test is
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completed. Functions added are called on a LIFO basis and are
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called after tearDown on test failure or success.
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Cleanup items are called even if setUp fails (unlike tearDown)."""
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self._cleanups.append((function, args, kwargs))
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def setUp(self):
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"Hook method for setting up the test fixture before exercising it."
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pass
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def tearDown(self):
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"Hook method for deconstructing the test fixture after testing it."
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pass
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@classmethod
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def setUpClass(cls):
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"Hook method for setting up class fixture before running tests in the class."
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@classmethod
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def tearDownClass(cls):
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"Hook method for deconstructing the class fixture after running all tests in the class."
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def countTestCases(self):
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return 1
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def defaultTestResult(self):
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return result.TestResult()
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def shortDescription(self):
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"""Returns a one-line description of the test, or None if no
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description has been provided.
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The default implementation of this method returns the first line of
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the specified test method's docstring.
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"""
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doc = self._testMethodDoc
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return doc and doc.split("\n")[0].strip() or None
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def id(self):
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return "%s.%s" % (strclass(self.__class__), self._testMethodName)
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def __eq__(self, other):
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if type(self) is not type(other):
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return NotImplemented
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return self._testMethodName == other._testMethodName
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def __hash__(self):
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return hash((type(self), self._testMethodName))
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def __str__(self):
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return "%s (%s)" % (self._testMethodName, strclass(self.__class__))
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def __repr__(self):
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return "<%s testMethod=%s>" % \
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(strclass(self.__class__), self._testMethodName)
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def _addSkip(self, result, reason):
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addSkip = getattr(result, 'addSkip', None)
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if addSkip is not None:
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addSkip(self, reason)
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else:
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warnings.warn("TestResult has no addSkip method, skips not reported",
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RuntimeWarning, 2)
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result.addSuccess(self)
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def _executeTestPart(self, function, outcome, isTest=False):
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try:
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function()
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except KeyboardInterrupt:
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raise
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except SkipTest as e:
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outcome.success = False
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outcome.skipped = str(e)
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except _UnexpectedSuccess:
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exc_info = sys.exc_info()
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outcome.success = False
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if isTest:
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outcome.unexpectedSuccess = exc_info
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else:
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outcome.errors.append(exc_info)
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except _ExpectedFailure:
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outcome.success = False
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exc_info = sys.exc_info()
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if isTest:
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outcome.expectedFailure = exc_info
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else:
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outcome.errors.append(exc_info)
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except self.failureException:
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outcome.success = False
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outcome.failures.append(sys.exc_info())
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exc_info = sys.exc_info()
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except:
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outcome.success = False
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outcome.errors.append(sys.exc_info())
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def run(self, result=None):
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orig_result = result
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if result is None:
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result = self.defaultTestResult()
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startTestRun = getattr(result, 'startTestRun', None)
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if startTestRun is not None:
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startTestRun()
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result.startTest(self)
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testMethod = getattr(self, self._testMethodName)
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if (getattr(self.__class__, "__unittest_skip__", False) or
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getattr(testMethod, "__unittest_skip__", False)):
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# If the class or method was skipped.
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try:
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skip_why = (getattr(self.__class__, '__unittest_skip_why__', '')
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or getattr(testMethod, '__unittest_skip_why__', ''))
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self._addSkip(result, skip_why)
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finally:
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result.stopTest(self)
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return
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try:
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outcome = _Outcome()
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self._outcomeForDoCleanups = outcome
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self._executeTestPart(self.setUp, outcome)
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if outcome.success:
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self._executeTestPart(testMethod, outcome, isTest=True)
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self._executeTestPart(self.tearDown, outcome)
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self.doCleanups()
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if outcome.success:
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result.addSuccess(self)
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else:
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if outcome.skipped is not None:
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self._addSkip(result, outcome.skipped)
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for exc_info in outcome.errors:
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result.addError(self, exc_info)
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for exc_info in outcome.failures:
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result.addFailure(self, exc_info)
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if outcome.unexpectedSuccess is not None:
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addUnexpectedSuccess = getattr(result, 'addUnexpectedSuccess', None)
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if addUnexpectedSuccess is not None:
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addUnexpectedSuccess(self)
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else:
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warnings.warn("TestResult has no addUnexpectedSuccess method, reporting as failures",
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RuntimeWarning)
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result.addFailure(self, outcome.unexpectedSuccess)
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if outcome.expectedFailure is not None:
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addExpectedFailure = getattr(result, 'addExpectedFailure', None)
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if addExpectedFailure is not None:
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addExpectedFailure(self, outcome.expectedFailure)
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else:
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warnings.warn("TestResult has no addExpectedFailure method, reporting as passes",
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RuntimeWarning)
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result.addSuccess(self)
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finally:
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result.stopTest(self)
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if orig_result is None:
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stopTestRun = getattr(result, 'stopTestRun', None)
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if stopTestRun is not None:
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stopTestRun()
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|
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def doCleanups(self):
|
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"""Execute all cleanup functions. Normally called for you after
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tearDown."""
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outcome = self._outcomeForDoCleanups or _Outcome()
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while self._cleanups:
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function, args, kwargs = self._cleanups.pop()
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part = lambda: function(*args, **kwargs)
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self._executeTestPart(part, outcome)
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|
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# return this for backwards compatibility
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# even though we no longer us it internally
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return outcome.success
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|
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def __call__(self, *args, **kwds):
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return self.run(*args, **kwds)
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|
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def debug(self):
|
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"""Run the test without collecting errors in a TestResult"""
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self.setUp()
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getattr(self, self._testMethodName)()
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self.tearDown()
|
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while self._cleanups:
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function, args, kwargs = self._cleanups.pop(-1)
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function(*args, **kwargs)
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|
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def skipTest(self, reason):
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"""Skip this test."""
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raise SkipTest(reason)
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def fail(self, msg=None):
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"""Fail immediately, with the given message."""
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raise self.failureException(msg)
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def assertFalse(self, expr, msg=None):
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"""Check that the expression is false."""
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if expr:
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msg = self._formatMessage(msg, "%s is not false" % safe_repr(expr))
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raise self.failureException(msg)
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def assertTrue(self, expr, msg=None):
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"""Check that the expression is true."""
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if not expr:
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msg = self._formatMessage(msg, "%s is not true" % safe_repr(expr))
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raise self.failureException(msg)
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def _formatMessage(self, msg, standardMsg):
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"""Honour the longMessage attribute when generating failure messages.
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If longMessage is False this means:
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* Use only an explicit message if it is provided
|
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* Otherwise use the standard message for the assert
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|
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If longMessage is True:
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* Use the standard message
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* If an explicit message is provided, plus ' : ' and the explicit message
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"""
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if not self.longMessage:
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return msg or standardMsg
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if msg is None:
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return standardMsg
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try:
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|
# don't switch to '{}' formatting in Python 2.X
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|
# it changes the way unicode input is handled
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return '%s : %s' % (standardMsg, msg)
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except UnicodeDecodeError:
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return '%s : %s' % (safe_repr(standardMsg), safe_repr(msg))
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|
|
|
|
def assertRaises(self, excClass, callableObj=None, *args, **kwargs):
|
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"""Fail unless an exception of class excClass is thrown
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by callableObj when invoked with arguments args and keyword
|
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arguments kwargs. If a different type of exception is
|
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thrown, it will not be caught, and the test case will be
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deemed to have suffered an error, exactly as for an
|
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unexpected exception.
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|
|
If called with callableObj omitted or None, will return a
|
|
context object used like this::
|
|
|
|
with self.assertRaises(SomeException):
|
|
do_something()
|
|
|
|
The context manager keeps a reference to the exception as
|
|
the 'exception' attribute. This allows you to inspect the
|
|
exception after the assertion::
|
|
|
|
with self.assertRaises(SomeException) as cm:
|
|
do_something()
|
|
the_exception = cm.exception
|
|
self.assertEqual(the_exception.error_code, 3)
|
|
"""
|
|
context = _AssertRaisesContext(excClass, self, callableObj)
|
|
if callableObj is None:
|
|
return context
|
|
with context:
|
|
callableObj(*args, **kwargs)
|
|
|
|
def assertWarns(self, expected_warning, callable_obj=None, *args, **kwargs):
|
|
"""Fail unless a warning of class warnClass is triggered
|
|
by callableObj when invoked with arguments args and keyword
|
|
arguments kwargs. If a different type of warning is
|
|
triggered, it will not be handled: depending on the other
|
|
warning filtering rules in effect, it might be silenced, printed
|
|
out, or raised as an exception.
|
|
|
|
If called with callableObj omitted or None, will return a
|
|
context object used like this::
|
|
|
|
with self.assertWarns(SomeWarning):
|
|
do_something()
|
|
|
|
The context manager keeps a reference to the first matching
|
|
warning as the 'warning' attribute; similarly, the 'filename'
|
|
and 'lineno' attributes give you information about the line
|
|
of Python code from which the warning was triggered.
|
|
This allows you to inspect the warning after the assertion::
|
|
|
|
with self.assertWarns(SomeWarning) as cm:
|
|
do_something()
|
|
the_warning = cm.warning
|
|
self.assertEqual(the_warning.some_attribute, 147)
|
|
"""
|
|
context = _AssertWarnsContext(expected_warning, self, callable_obj)
|
|
if callable_obj is None:
|
|
return context
|
|
with context:
|
|
callable_obj(*args, **kwargs)
|
|
|
|
def _getAssertEqualityFunc(self, first, second):
|
|
"""Get a detailed comparison function for the types of the two args.
|
|
|
|
Returns: A callable accepting (first, second, msg=None) that will
|
|
raise a failure exception if first != second with a useful human
|
|
readable error message for those types.
|
|
"""
|
|
#
|
|
# NOTE(gregory.p.smith): I considered isinstance(first, type(second))
|
|
# and vice versa. I opted for the conservative approach in case
|
|
# subclasses are not intended to be compared in detail to their super
|
|
# class instances using a type equality func. This means testing
|
|
# subtypes won't automagically use the detailed comparison. Callers
|
|
# should use their type specific assertSpamEqual method to compare
|
|
# subclasses if the detailed comparison is desired and appropriate.
|
|
# See the discussion in http://bugs.python.org/issue2578.
|
|
#
|
|
if type(first) is type(second):
|
|
asserter = self._type_equality_funcs.get(type(first))
|
|
if asserter is not None:
|
|
return asserter
|
|
|
|
return self._baseAssertEqual
|
|
|
|
def _baseAssertEqual(self, first, second, msg=None):
|
|
"""The default assertEqual implementation, not type specific."""
|
|
if not first == second:
|
|
standardMsg = '%s != %s' % (safe_repr(first), safe_repr(second))
|
|
msg = self._formatMessage(msg, standardMsg)
|
|
raise self.failureException(msg)
|
|
|
|
def assertEqual(self, first, second, msg=None):
|
|
"""Fail if the two objects are unequal as determined by the '=='
|
|
operator.
|
|
"""
|
|
assertion_func = self._getAssertEqualityFunc(first, second)
|
|
assertion_func(first, second, msg=msg)
|
|
|
|
def assertNotEqual(self, first, second, msg=None):
|
|
"""Fail if the two objects are equal as determined by the '=='
|
|
operator.
|
|
"""
|
|
if not first != second:
|
|
msg = self._formatMessage(msg, '%s == %s' % (safe_repr(first),
|
|
safe_repr(second)))
|
|
raise self.failureException(msg)
|
|
|
|
def assertAlmostEqual(self, first, second, places=None, msg=None,
|
|
delta=None):
|
|
"""Fail if the two objects are unequal as determined by their
|
|
difference rounded to the given number of decimal places
|
|
(default 7) and comparing to zero, or by comparing that the
|
|
between the two objects is more than the given delta.
|
|
|
|
Note that decimal places (from zero) are usually not the same
|
|
as significant digits (measured from the most signficant digit).
|
|
|
|
If the two objects compare equal then they will automatically
|
|
compare almost equal.
|
|
"""
|
|
if first == second:
|
|
# shortcut
|
|
return
|
|
if delta is not None and places is not None:
|
|
raise TypeError("specify delta or places not both")
|
|
|
|
if delta is not None:
|
|
if abs(first - second) <= delta:
|
|
return
|
|
|
|
standardMsg = '%s != %s within %s delta' % (safe_repr(first),
|
|
safe_repr(second),
|
|
safe_repr(delta))
|
|
else:
|
|
if places is None:
|
|
places = 7
|
|
|
|
if round(abs(second-first), places) == 0:
|
|
return
|
|
|
|
standardMsg = '%s != %s within %r places' % (safe_repr(first),
|
|
safe_repr(second),
|
|
places)
|
|
msg = self._formatMessage(msg, standardMsg)
|
|
raise self.failureException(msg)
|
|
|
|
def assertNotAlmostEqual(self, first, second, places=None, msg=None,
|
|
delta=None):
|
|
"""Fail if the two objects are equal as determined by their
|
|
difference rounded to the given number of decimal places
|
|
(default 7) and comparing to zero, or by comparing that the
|
|
between the two objects is less than the given delta.
|
|
|
|
Note that decimal places (from zero) are usually not the same
|
|
as significant digits (measured from the most signficant digit).
|
|
|
|
Objects that are equal automatically fail.
|
|
"""
|
|
if delta is not None and places is not None:
|
|
raise TypeError("specify delta or places not both")
|
|
if delta is not None:
|
|
if not (first == second) and abs(first - second) > delta:
|
|
return
|
|
standardMsg = '%s == %s within %s delta' % (safe_repr(first),
|
|
safe_repr(second),
|
|
safe_repr(delta))
|
|
else:
|
|
if places is None:
|
|
places = 7
|
|
if not (first == second) and round(abs(second-first), places) != 0:
|
|
return
|
|
standardMsg = '%s == %s within %r places' % (safe_repr(first),
|
|
safe_repr(second),
|
|
places)
|
|
|
|
msg = self._formatMessage(msg, standardMsg)
|
|
raise self.failureException(msg)
|
|
|
|
|
|
def assertSequenceEqual(self, seq1, seq2, msg=None, seq_type=None):
|
|
"""An equality assertion for ordered sequences (like lists and tuples).
|
|
|
|
For the purposes of this function, a valid ordered sequence type is one
|
|
which can be indexed, has a length, and has an equality operator.
|
|
|
|
Args:
|
|
seq1: The first sequence to compare.
|
|
seq2: The second sequence to compare.
|
|
seq_type: The expected datatype of the sequences, or None if no
|
|
datatype should be enforced.
|
|
msg: Optional message to use on failure instead of a list of
|
|
differences.
|
|
"""
|
|
if seq_type != None:
|
|
seq_type_name = seq_type.__name__
|
|
if not isinstance(seq1, seq_type):
|
|
raise self.failureException('First sequence is not a %s: %s'
|
|
% (seq_type_name, safe_repr(seq1)))
|
|
if not isinstance(seq2, seq_type):
|
|
raise self.failureException('Second sequence is not a %s: %s'
|
|
% (seq_type_name, safe_repr(seq2)))
|
|
else:
|
|
seq_type_name = "sequence"
|
|
|
|
differing = None
|
|
try:
|
|
len1 = len(seq1)
|
|
except (TypeError, NotImplementedError):
|
|
differing = 'First %s has no length. Non-sequence?' % (
|
|
seq_type_name)
|
|
|
|
if differing is None:
|
|
try:
|
|
len2 = len(seq2)
|
|
except (TypeError, NotImplementedError):
|
|
differing = 'Second %s has no length. Non-sequence?' % (
|
|
seq_type_name)
|
|
|
|
if differing is None:
|
|
if seq1 == seq2:
|
|
return
|
|
|
|
seq1_repr = safe_repr(seq1)
|
|
seq2_repr = safe_repr(seq2)
|
|
if len(seq1_repr) > 30:
|
|
seq1_repr = seq1_repr[:30] + '...'
|
|
if len(seq2_repr) > 30:
|
|
seq2_repr = seq2_repr[:30] + '...'
|
|
elements = (seq_type_name.capitalize(), seq1_repr, seq2_repr)
|
|
differing = '%ss differ: %s != %s\n' % elements
|
|
|
|
for i in range(min(len1, len2)):
|
|
try:
|
|
item1 = seq1[i]
|
|
except (TypeError, IndexError, NotImplementedError):
|
|
differing += ('\nUnable to index element %d of first %s\n' %
|
|
(i, seq_type_name))
|
|
break
|
|
|
|
try:
|
|
item2 = seq2[i]
|
|
except (TypeError, IndexError, NotImplementedError):
|
|
differing += ('\nUnable to index element %d of second %s\n' %
|
|
(i, seq_type_name))
|
|
break
|
|
|
|
if item1 != item2:
|
|
differing += ('\nFirst differing element %d:\n%s\n%s\n' %
|
|
(i, item1, item2))
|
|
break
|
|
else:
|
|
if (len1 == len2 and seq_type is None and
|
|
type(seq1) != type(seq2)):
|
|
# The sequences are the same, but have differing types.
|
|
return
|
|
|
|
if len1 > len2:
|
|
differing += ('\nFirst %s contains %d additional '
|
|
'elements.\n' % (seq_type_name, len1 - len2))
|
|
try:
|
|
differing += ('First extra element %d:\n%s\n' %
|
|
(len2, seq1[len2]))
|
|
except (TypeError, IndexError, NotImplementedError):
|
|
differing += ('Unable to index element %d '
|
|
'of first %s\n' % (len2, seq_type_name))
|
|
elif len1 < len2:
|
|
differing += ('\nSecond %s contains %d additional '
|
|
'elements.\n' % (seq_type_name, len2 - len1))
|
|
try:
|
|
differing += ('First extra element %d:\n%s\n' %
|
|
(len1, seq2[len1]))
|
|
except (TypeError, IndexError, NotImplementedError):
|
|
differing += ('Unable to index element %d '
|
|
'of second %s\n' % (len1, seq_type_name))
|
|
standardMsg = differing
|
|
diffMsg = '\n' + '\n'.join(
|
|
difflib.ndiff(pprint.pformat(seq1).splitlines(),
|
|
pprint.pformat(seq2).splitlines()))
|
|
|
|
standardMsg = self._truncateMessage(standardMsg, diffMsg)
|
|
msg = self._formatMessage(msg, standardMsg)
|
|
self.fail(msg)
|
|
|
|
def _truncateMessage(self, message, diff):
|
|
max_diff = self.maxDiff
|
|
if max_diff is None or len(diff) <= max_diff:
|
|
return message + diff
|
|
return message + (DIFF_OMITTED % len(diff))
|
|
|
|
def assertListEqual(self, list1, list2, msg=None):
|
|
"""A list-specific equality assertion.
|
|
|
|
Args:
|
|
list1: The first list to compare.
|
|
list2: The second list to compare.
|
|
msg: Optional message to use on failure instead of a list of
|
|
differences.
|
|
|
|
"""
|
|
self.assertSequenceEqual(list1, list2, msg, seq_type=list)
|
|
|
|
def assertTupleEqual(self, tuple1, tuple2, msg=None):
|
|
"""A tuple-specific equality assertion.
|
|
|
|
Args:
|
|
tuple1: The first tuple to compare.
|
|
tuple2: The second tuple to compare.
|
|
msg: Optional message to use on failure instead of a list of
|
|
differences.
|
|
"""
|
|
self.assertSequenceEqual(tuple1, tuple2, msg, seq_type=tuple)
|
|
|
|
def assertSetEqual(self, set1, set2, msg=None):
|
|
"""A set-specific equality assertion.
|
|
|
|
Args:
|
|
set1: The first set to compare.
|
|
set2: The second set to compare.
|
|
msg: Optional message to use on failure instead of a list of
|
|
differences.
|
|
|
|
assertSetEqual uses ducktyping to support different types of sets, and
|
|
is optimized for sets specifically (parameters must support a
|
|
difference method).
|
|
"""
|
|
try:
|
|
difference1 = set1.difference(set2)
|
|
except TypeError as e:
|
|
self.fail('invalid type when attempting set difference: %s' % e)
|
|
except AttributeError as e:
|
|
self.fail('first argument does not support set difference: %s' % e)
|
|
|
|
try:
|
|
difference2 = set2.difference(set1)
|
|
except TypeError as e:
|
|
self.fail('invalid type when attempting set difference: %s' % e)
|
|
except AttributeError as e:
|
|
self.fail('second argument does not support set difference: %s' % e)
|
|
|
|
if not (difference1 or difference2):
|
|
return
|
|
|
|
lines = []
|
|
if difference1:
|
|
lines.append('Items in the first set but not the second:')
|
|
for item in difference1:
|
|
lines.append(repr(item))
|
|
if difference2:
|
|
lines.append('Items in the second set but not the first:')
|
|
for item in difference2:
|
|
lines.append(repr(item))
|
|
|
|
standardMsg = '\n'.join(lines)
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertIn(self, member, container, msg=None):
|
|
"""Just like self.assertTrue(a in b), but with a nicer default message."""
|
|
if member not in container:
|
|
standardMsg = '%s not found in %s' % (safe_repr(member),
|
|
safe_repr(container))
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertNotIn(self, member, container, msg=None):
|
|
"""Just like self.assertTrue(a not in b), but with a nicer default message."""
|
|
if member in container:
|
|
standardMsg = '%s unexpectedly found in %s' % (safe_repr(member),
|
|
safe_repr(container))
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertIs(self, expr1, expr2, msg=None):
|
|
"""Just like self.assertTrue(a is b), but with a nicer default message."""
|
|
if expr1 is not expr2:
|
|
standardMsg = '%s is not %s' % (safe_repr(expr1),
|
|
safe_repr(expr2))
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertIsNot(self, expr1, expr2, msg=None):
|
|
"""Just like self.assertTrue(a is not b), but with a nicer default message."""
|
|
if expr1 is expr2:
|
|
standardMsg = 'unexpectedly identical: %s' % (safe_repr(expr1),)
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertDictEqual(self, d1, d2, msg=None):
|
|
self.assertIsInstance(d1, dict, 'First argument is not a dictionary')
|
|
self.assertIsInstance(d2, dict, 'Second argument is not a dictionary')
|
|
|
|
if d1 != d2:
|
|
standardMsg = '%s != %s' % (safe_repr(d1, True), safe_repr(d2, True))
|
|
diff = ('\n' + '\n'.join(difflib.ndiff(
|
|
pprint.pformat(d1).splitlines(),
|
|
pprint.pformat(d2).splitlines())))
|
|
standardMsg = self._truncateMessage(standardMsg, diff)
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertDictContainsSubset(self, subset, dictionary, msg=None):
|
|
"""Checks whether dictionary is a superset of subset."""
|
|
warnings.warn('assertDictContainsSubset is deprecated',
|
|
DeprecationWarning)
|
|
missing = []
|
|
mismatched = []
|
|
for key, value in subset.items():
|
|
if key not in dictionary:
|
|
missing.append(key)
|
|
elif value != dictionary[key]:
|
|
mismatched.append('%s, expected: %s, actual: %s' %
|
|
(safe_repr(key), safe_repr(value),
|
|
safe_repr(dictionary[key])))
|
|
|
|
if not (missing or mismatched):
|
|
return
|
|
|
|
standardMsg = ''
|
|
if missing:
|
|
standardMsg = 'Missing: %s' % ','.join(safe_repr(m) for m in
|
|
missing)
|
|
if mismatched:
|
|
if standardMsg:
|
|
standardMsg += '; '
|
|
standardMsg += 'Mismatched values: %s' % ','.join(mismatched)
|
|
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertSameElements(self, expected_seq, actual_seq, msg=None):
|
|
"""An unordered sequence specific comparison.
|
|
|
|
Raises with an error message listing which elements of expected_seq
|
|
are missing from actual_seq and vice versa if any.
|
|
|
|
Duplicate elements are ignored when comparing *expected_seq* and
|
|
*actual_seq*. It is the equivalent of ``assertEqual(set(expected),
|
|
set(actual))`` but it works with sequences of unhashable objects as
|
|
well.
|
|
"""
|
|
warnings.warn('assertSameElements is deprecated',
|
|
DeprecationWarning)
|
|
try:
|
|
expected = set(expected_seq)
|
|
actual = set(actual_seq)
|
|
missing = sorted(expected.difference(actual))
|
|
unexpected = sorted(actual.difference(expected))
|
|
except TypeError:
|
|
# Fall back to slower list-compare if any of the objects are
|
|
# not hashable.
|
|
expected = list(expected_seq)
|
|
actual = list(actual_seq)
|
|
try:
|
|
expected.sort()
|
|
actual.sort()
|
|
except TypeError:
|
|
missing, unexpected = unorderable_list_difference(expected,
|
|
actual)
|
|
else:
|
|
missing, unexpected = sorted_list_difference(expected, actual)
|
|
errors = []
|
|
if missing:
|
|
errors.append('Expected, but missing:\n %s' %
|
|
safe_repr(missing))
|
|
if unexpected:
|
|
errors.append('Unexpected, but present:\n %s' %
|
|
safe_repr(unexpected))
|
|
if errors:
|
|
standardMsg = '\n'.join(errors)
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
|
|
def assertCountEqual(self, actual_seq, expected_seq, msg=None):
|
|
"""An unordered sequence specific comparison. It asserts that
|
|
actual_seq and expected_seq have the same element counts.
|
|
Equivalent to::
|
|
|
|
self.assertEqual(Counter(iter(actual_seq)),
|
|
Counter(iter(expected_seq)))
|
|
|
|
Asserts that each element has the same count in both sequences.
|
|
Example:
|
|
- [0, 1, 1] and [1, 0, 1] compare equal.
|
|
- [0, 0, 1] and [0, 1] compare unequal.
|
|
"""
|
|
try:
|
|
actual = collections.Counter(iter(actual_seq))
|
|
expected = collections.Counter(iter(expected_seq))
|
|
except TypeError:
|
|
# Unsortable items (example: set(), complex(), ...)
|
|
actual = list(actual_seq)
|
|
expected = list(expected_seq)
|
|
missing, unexpected = unorderable_list_difference(expected, actual)
|
|
else:
|
|
if actual == expected:
|
|
return
|
|
missing = list(expected - actual)
|
|
unexpected = list(actual - expected)
|
|
|
|
errors = []
|
|
if missing:
|
|
errors.append('Expected, but missing:\n %s' %
|
|
safe_repr(missing))
|
|
if unexpected:
|
|
errors.append('Unexpected, but present:\n %s' %
|
|
safe_repr(unexpected))
|
|
if errors:
|
|
standardMsg = '\n'.join(errors)
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertMultiLineEqual(self, first, second, msg=None):
|
|
"""Assert that two multi-line strings are equal."""
|
|
self.assertIsInstance(first, str, 'First argument is not a string')
|
|
self.assertIsInstance(second, str, 'Second argument is not a string')
|
|
|
|
if first != second:
|
|
firstlines = first.splitlines(True)
|
|
secondlines = second.splitlines(True)
|
|
if len(firstlines) == 1 and first.strip('\r\n') == first:
|
|
firstlines = [first + '\n']
|
|
secondlines = [second + '\n']
|
|
standardMsg = '%s != %s' % (safe_repr(first, True),
|
|
safe_repr(second, True))
|
|
diff = '\n' + ''.join(difflib.ndiff(firstlines, secondlines))
|
|
standardMsg = self._truncateMessage(standardMsg, diff)
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertLess(self, a, b, msg=None):
|
|
"""Just like self.assertTrue(a < b), but with a nicer default message."""
|
|
if not a < b:
|
|
standardMsg = '%s not less than %s' % (safe_repr(a), safe_repr(b))
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertLessEqual(self, a, b, msg=None):
|
|
"""Just like self.assertTrue(a <= b), but with a nicer default message."""
|
|
if not a <= b:
|
|
standardMsg = '%s not less than or equal to %s' % (safe_repr(a), safe_repr(b))
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertGreater(self, a, b, msg=None):
|
|
"""Just like self.assertTrue(a > b), but with a nicer default message."""
|
|
if not a > b:
|
|
standardMsg = '%s not greater than %s' % (safe_repr(a), safe_repr(b))
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertGreaterEqual(self, a, b, msg=None):
|
|
"""Just like self.assertTrue(a >= b), but with a nicer default message."""
|
|
if not a >= b:
|
|
standardMsg = '%s not greater than or equal to %s' % (safe_repr(a), safe_repr(b))
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertIsNone(self, obj, msg=None):
|
|
"""Same as self.assertTrue(obj is None), with a nicer default message."""
|
|
if obj is not None:
|
|
standardMsg = '%s is not None' % (safe_repr(obj),)
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertIsNotNone(self, obj, msg=None):
|
|
"""Included for symmetry with assertIsNone."""
|
|
if obj is None:
|
|
standardMsg = 'unexpectedly None'
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertIsInstance(self, obj, cls, msg=None):
|
|
"""Same as self.assertTrue(isinstance(obj, cls)), with a nicer
|
|
default message."""
|
|
if not isinstance(obj, cls):
|
|
standardMsg = '%s is not an instance of %r' % (safe_repr(obj), cls)
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertNotIsInstance(self, obj, cls, msg=None):
|
|
"""Included for symmetry with assertIsInstance."""
|
|
if isinstance(obj, cls):
|
|
standardMsg = '%s is an instance of %r' % (safe_repr(obj), cls)
|
|
self.fail(self._formatMessage(msg, standardMsg))
|
|
|
|
def assertRaisesRegex(self, expected_exception, expected_regex,
|
|
callable_obj=None, *args, **kwargs):
|
|
"""Asserts that the message in a raised exception matches a regex.
|
|
|
|
Args:
|
|
expected_exception: Exception class expected to be raised.
|
|
expected_regex: Regex (re pattern object or string) expected
|
|
to be found in error message.
|
|
callable_obj: Function to be called.
|
|
args: Extra args.
|
|
kwargs: Extra kwargs.
|
|
"""
|
|
context = _AssertRaisesContext(expected_exception, self, callable_obj,
|
|
expected_regex)
|
|
if callable_obj is None:
|
|
return context
|
|
with context:
|
|
callable_obj(*args, **kwargs)
|
|
|
|
def assertWarnsRegex(self, expected_warning, expected_regex,
|
|
callable_obj=None, *args, **kwargs):
|
|
"""Asserts that the message in a triggered warning matches a regexp.
|
|
Basic functioning is similar to assertWarns() with the addition
|
|
that only warnings whose messages also match the regular expression
|
|
are considered successful matches.
|
|
|
|
Args:
|
|
expected_warning: Warning class expected to be triggered.
|
|
expected_regex: Regex (re pattern object or string) expected
|
|
to be found in error message.
|
|
callable_obj: Function to be called.
|
|
args: Extra args.
|
|
kwargs: Extra kwargs.
|
|
"""
|
|
context = _AssertWarnsContext(expected_warning, self, callable_obj,
|
|
expected_regex)
|
|
if callable_obj is None:
|
|
return context
|
|
with context:
|
|
callable_obj(*args, **kwargs)
|
|
|
|
def assertRegex(self, text, expected_regex, msg=None):
|
|
"""Fail the test unless the text matches the regular expression."""
|
|
if isinstance(expected_regex, (str, bytes)):
|
|
assert expected_regex, "expected_regex must not be empty."
|
|
expected_regex = re.compile(expected_regex)
|
|
if not expected_regex.search(text):
|
|
msg = msg or "Regex didn't match"
|
|
msg = '%s: %r not found in %r' % (msg, expected_regex.pattern, text)
|
|
raise self.failureException(msg)
|
|
|
|
def assertNotRegex(self, text, unexpected_regex, msg=None):
|
|
"""Fail the test if the text matches the regular expression."""
|
|
if isinstance(unexpected_regex, (str, bytes)):
|
|
unexpected_regex = re.compile(unexpected_regex)
|
|
match = unexpected_regex.search(text)
|
|
if match:
|
|
msg = msg or "Regex matched"
|
|
msg = '%s: %r matches %r in %r' % (msg,
|
|
text[match.start():match.end()],
|
|
unexpected_regex.pattern,
|
|
text)
|
|
raise self.failureException(msg)
|
|
|
|
|
|
def _deprecate(original_func):
|
|
def deprecated_func(*args, **kwargs):
|
|
warnings.warn(
|
|
'Please use {0} instead.'.format(original_func.__name__),
|
|
DeprecationWarning, 2)
|
|
return original_func(*args, **kwargs)
|
|
return deprecated_func
|
|
|
|
# The fail* methods can be removed in 3.3, the 5 assert* methods will
|
|
# have to stay around for a few more versions. See #9424.
|
|
failUnlessEqual = assertEquals = _deprecate(assertEqual)
|
|
failIfEqual = assertNotEquals = _deprecate(assertNotEqual)
|
|
failUnlessAlmostEqual = assertAlmostEquals = _deprecate(assertAlmostEqual)
|
|
failIfAlmostEqual = assertNotAlmostEquals = _deprecate(assertNotAlmostEqual)
|
|
failUnless = assert_ = _deprecate(assertTrue)
|
|
failUnlessRaises = _deprecate(assertRaises)
|
|
failIf = _deprecate(assertFalse)
|
|
assertRaisesRegexp = _deprecate(assertRaisesRegex)
|
|
assertRegexpMatches = _deprecate(assertRegex)
|
|
|
|
|
|
|
|
class FunctionTestCase(TestCase):
|
|
"""A test case that wraps a test function.
|
|
|
|
This is useful for slipping pre-existing test functions into the
|
|
unittest framework. Optionally, set-up and tidy-up functions can be
|
|
supplied. As with TestCase, the tidy-up ('tearDown') function will
|
|
always be called if the set-up ('setUp') function ran successfully.
|
|
"""
|
|
|
|
def __init__(self, testFunc, setUp=None, tearDown=None, description=None):
|
|
super(FunctionTestCase, self).__init__()
|
|
self._setUpFunc = setUp
|
|
self._tearDownFunc = tearDown
|
|
self._testFunc = testFunc
|
|
self._description = description
|
|
|
|
def setUp(self):
|
|
if self._setUpFunc is not None:
|
|
self._setUpFunc()
|
|
|
|
def tearDown(self):
|
|
if self._tearDownFunc is not None:
|
|
self._tearDownFunc()
|
|
|
|
def runTest(self):
|
|
self._testFunc()
|
|
|
|
def id(self):
|
|
return self._testFunc.__name__
|
|
|
|
def __eq__(self, other):
|
|
if not isinstance(other, self.__class__):
|
|
return NotImplemented
|
|
|
|
return self._setUpFunc == other._setUpFunc and \
|
|
self._tearDownFunc == other._tearDownFunc and \
|
|
self._testFunc == other._testFunc and \
|
|
self._description == other._description
|
|
|
|
def __ne__(self, other):
|
|
return not self == other
|
|
|
|
def __hash__(self):
|
|
return hash((type(self), self._setUpFunc, self._tearDownFunc,
|
|
self._testFunc, self._description))
|
|
|
|
def __str__(self):
|
|
return "%s (%s)" % (strclass(self.__class__),
|
|
self._testFunc.__name__)
|
|
|
|
def __repr__(self):
|
|
return "<%s tec=%s>" % (strclass(self.__class__),
|
|
self._testFunc)
|
|
|
|
def shortDescription(self):
|
|
if self._description is not None:
|
|
return self._description
|
|
doc = self._testFunc.__doc__
|
|
return doc and doc.split("\n")[0].strip() or None
|