1174 lines
38 KiB
Python
1174 lines
38 KiB
Python
# Module doctest.
|
|
# Released to the public domain 16-Jan-2001,
|
|
# by Tim Peters (tim.one@home.com).
|
|
|
|
# Provided as-is; use at your own risk; no warranty; no promises; enjoy!
|
|
|
|
"""Module doctest -- a framework for running examples in docstrings.
|
|
|
|
NORMAL USAGE
|
|
|
|
In normal use, end each module M with:
|
|
|
|
def _test():
|
|
import doctest, M # replace M with your module's name
|
|
return doctest.testmod(M) # ditto
|
|
|
|
if __name__ == "__main__":
|
|
_test()
|
|
|
|
Then running the module as a script will cause the examples in the
|
|
docstrings to get executed and verified:
|
|
|
|
python M.py
|
|
|
|
This won't display anything unless an example fails, in which case the
|
|
failing example(s) and the cause(s) of the failure(s) are printed to stdout
|
|
(why not stderr? because stderr is a lame hack <0.2 wink>), and the final
|
|
line of output is "Test failed.".
|
|
|
|
Run it with the -v switch instead:
|
|
|
|
python M.py -v
|
|
|
|
and a detailed report of all examples tried is printed to stdout, along
|
|
with assorted summaries at the end.
|
|
|
|
You can force verbose mode by passing "verbose=1" to testmod, or prohibit
|
|
it by passing "verbose=0". In either of those cases, sys.argv is not
|
|
examined by testmod.
|
|
|
|
In any case, testmod returns a 2-tuple of ints (f, t), where f is the
|
|
number of docstring examples that failed and t is the total number of
|
|
docstring examples attempted.
|
|
|
|
|
|
WHICH DOCSTRINGS ARE EXAMINED?
|
|
|
|
+ M.__doc__.
|
|
|
|
+ f.__doc__ for all functions f in M.__dict__.values(), except those
|
|
with private names and those defined in other modules.
|
|
|
|
+ C.__doc__ for all classes C in M.__dict__.values(), except those with
|
|
private names and those defined in other modules.
|
|
|
|
+ If M.__test__ exists and "is true", it must be a dict, and
|
|
each entry maps a (string) name to a function object, class object, or
|
|
string. Function and class object docstrings found from M.__test__
|
|
are searched even if the name is private, and strings are searched
|
|
directly as if they were docstrings. In output, a key K in M.__test__
|
|
appears with name
|
|
<name of M>.__test__.K
|
|
|
|
Any classes found are recursively searched similarly, to test docstrings in
|
|
their contained methods and nested classes. Private names reached from M's
|
|
globals are skipped, but all names reached from M.__test__ are searched.
|
|
|
|
By default, a name is considered to be private if it begins with an
|
|
underscore (like "_my_func") but doesn't both begin and end with (at least)
|
|
two underscores (like "__init__"). You can change the default by passing
|
|
your own "isprivate" function to testmod.
|
|
|
|
If you want to test docstrings in objects with private names too, stuff
|
|
them into an M.__test__ dict, or see ADVANCED USAGE below (e.g., pass your
|
|
own isprivate function to Tester's constructor, or call the rundoc method
|
|
of a Tester instance).
|
|
|
|
WHAT'S THE EXECUTION CONTEXT?
|
|
|
|
By default, each time testmod finds a docstring to test, it uses a *copy*
|
|
of M's globals (so that running tests on a module doesn't change the
|
|
module's real globals, and so that one test in M can't leave behind crumbs
|
|
that accidentally allow another test to work). This means examples can
|
|
freely use any names defined at top-level in M. It also means that sloppy
|
|
imports (see above) can cause examples in external docstrings to use
|
|
globals inappropriate for them.
|
|
|
|
You can force use of your own dict as the execution context by passing
|
|
"globs=your_dict" to testmod instead. Presumably this would be a copy of
|
|
M.__dict__ merged with the globals from other imported modules.
|
|
|
|
|
|
WHAT IF I WANT TO TEST A WHOLE PACKAGE?
|
|
|
|
Piece o' cake, provided the modules do their testing from docstrings.
|
|
Here's the test.py I use for the world's most elaborate Rational/
|
|
floating-base-conversion pkg (which I'll distribute some day):
|
|
|
|
from Rational import Cvt
|
|
from Rational import Format
|
|
from Rational import machprec
|
|
from Rational import Rat
|
|
from Rational import Round
|
|
from Rational import utils
|
|
|
|
modules = (Cvt,
|
|
Format,
|
|
machprec,
|
|
Rat,
|
|
Round,
|
|
utils)
|
|
|
|
def _test():
|
|
import doctest
|
|
import sys
|
|
verbose = "-v" in sys.argv
|
|
for mod in modules:
|
|
doctest.testmod(mod, verbose=verbose, report=0)
|
|
doctest.master.summarize()
|
|
|
|
if __name__ == "__main__":
|
|
_test()
|
|
|
|
IOW, it just runs testmod on all the pkg modules. testmod remembers the
|
|
names and outcomes (# of failures, # of tries) for each item it's seen, and
|
|
passing "report=0" prevents it from printing a summary in verbose mode.
|
|
Instead, the summary is delayed until all modules have been tested, and
|
|
then "doctest.master.summarize()" forces the summary at the end.
|
|
|
|
So this is very nice in practice: each module can be tested individually
|
|
with almost no work beyond writing up docstring examples, and collections
|
|
of modules can be tested too as a unit with no more work than the above.
|
|
|
|
|
|
WHAT ABOUT EXCEPTIONS?
|
|
|
|
No problem, as long as the only output generated by the example is the
|
|
traceback itself. For example:
|
|
|
|
>>> [1, 2, 3].remove(42)
|
|
Traceback (most recent call last):
|
|
File "<stdin>", line 1, in ?
|
|
ValueError: list.remove(x): x not in list
|
|
>>>
|
|
|
|
Note that only the exception type and value are compared (specifically,
|
|
only the last line in the traceback).
|
|
|
|
|
|
ADVANCED USAGE
|
|
|
|
doctest.testmod() captures the testing policy I find most useful most
|
|
often. You may want other policies.
|
|
|
|
testmod() actually creates a local instance of class doctest.Tester, runs
|
|
appropriate methods of that class, and merges the results into global
|
|
Tester instance doctest.master.
|
|
|
|
You can create your own instances of doctest.Tester, and so build your own
|
|
policies, or even run methods of doctest.master directly. See
|
|
doctest.Tester.__doc__ for details.
|
|
|
|
|
|
SO WHAT DOES A DOCSTRING EXAMPLE LOOK LIKE ALREADY!?
|
|
|
|
Oh ya. It's easy! In most cases a copy-and-paste of an interactive
|
|
console session works fine -- just make sure the leading whitespace is
|
|
rigidly consistent (you can mix tabs and spaces if you're too lazy to do it
|
|
right, but doctest is not in the business of guessing what you think a tab
|
|
means).
|
|
|
|
>>> # comments are ignored
|
|
>>> x = 12
|
|
>>> x
|
|
12
|
|
>>> if x == 13:
|
|
... print "yes"
|
|
... else:
|
|
... print "no"
|
|
... print "NO"
|
|
... print "NO!!!"
|
|
...
|
|
no
|
|
NO
|
|
NO!!!
|
|
>>>
|
|
|
|
Any expected output must immediately follow the final ">>>" or "..." line
|
|
containing the code, and the expected output (if any) extends to the next
|
|
">>>" or all-whitespace line. That's it.
|
|
|
|
Bummers:
|
|
|
|
+ Expected output cannot contain an all-whitespace line, since such a line
|
|
is taken to signal the end of expected output.
|
|
|
|
+ Output to stdout is captured, but not output to stderr (exception
|
|
tracebacks are captured via a different means).
|
|
|
|
+ If you continue a line via backslashing in an interactive session, or for
|
|
any other reason use a backslash, you need to double the backslash in the
|
|
docstring version. This is simply because you're in a string, and so the
|
|
backslash must be escaped for it to survive intact. Like:
|
|
|
|
>>> if "yes" == \\
|
|
... "y" + \\
|
|
... "es": # in the source code you'll see the doubled backslashes
|
|
... print 'yes'
|
|
yes
|
|
|
|
The starting column doesn't matter:
|
|
|
|
>>> assert "Easy!"
|
|
>>> import math
|
|
>>> math.floor(1.9)
|
|
1.0
|
|
|
|
and as many leading whitespace characters are stripped from the expected
|
|
output as appeared in the initial ">>>" line that triggered it.
|
|
|
|
If you execute this very file, the examples above will be found and
|
|
executed, leading to this output in verbose mode:
|
|
|
|
Running doctest.__doc__
|
|
Trying: [1, 2, 3].remove(42)
|
|
Expecting:
|
|
Traceback (most recent call last):
|
|
File "<stdin>", line 1, in ?
|
|
ValueError: list.remove(x): x not in list
|
|
ok
|
|
Trying: x = 12
|
|
Expecting: nothing
|
|
ok
|
|
Trying: x
|
|
Expecting: 12
|
|
ok
|
|
Trying:
|
|
if x == 13:
|
|
print "yes"
|
|
else:
|
|
print "no"
|
|
print "NO"
|
|
print "NO!!!"
|
|
Expecting:
|
|
no
|
|
NO
|
|
NO!!!
|
|
ok
|
|
... and a bunch more like that, with this summary at the end:
|
|
|
|
5 items had no tests:
|
|
doctest.Tester.__init__
|
|
doctest.Tester.run__test__
|
|
doctest.Tester.summarize
|
|
doctest.run_docstring_examples
|
|
doctest.testmod
|
|
12 items passed all tests:
|
|
8 tests in doctest
|
|
6 tests in doctest.Tester
|
|
10 tests in doctest.Tester.merge
|
|
14 tests in doctest.Tester.rundict
|
|
3 tests in doctest.Tester.rundoc
|
|
3 tests in doctest.Tester.runstring
|
|
2 tests in doctest.__test__._TestClass
|
|
2 tests in doctest.__test__._TestClass.__init__
|
|
2 tests in doctest.__test__._TestClass.get
|
|
1 tests in doctest.__test__._TestClass.square
|
|
2 tests in doctest.__test__.string
|
|
7 tests in doctest.is_private
|
|
60 tests in 17 items.
|
|
60 passed and 0 failed.
|
|
Test passed.
|
|
"""
|
|
|
|
__all__ = [
|
|
'testmod',
|
|
'run_docstring_examples',
|
|
'is_private',
|
|
'Tester',
|
|
]
|
|
|
|
import __future__
|
|
|
|
import re
|
|
PS1 = ">>>"
|
|
PS2 = "..."
|
|
_isPS1 = re.compile(r"(\s*)" + re.escape(PS1)).match
|
|
_isPS2 = re.compile(r"(\s*)" + re.escape(PS2)).match
|
|
_isEmpty = re.compile(r"\s*$").match
|
|
_isComment = re.compile(r"\s*#").match
|
|
del re
|
|
|
|
from types import StringTypes as _StringTypes
|
|
|
|
from inspect import isclass as _isclass
|
|
from inspect import isfunction as _isfunction
|
|
from inspect import ismodule as _ismodule
|
|
from inspect import classify_class_attrs as _classify_class_attrs
|
|
|
|
# Extract interactive examples from a string. Return a list of triples,
|
|
# (source, outcome, lineno). "source" is the source code, and ends
|
|
# with a newline iff the source spans more than one line. "outcome" is
|
|
# the expected output if any, else an empty string. When not empty,
|
|
# outcome always ends with a newline. "lineno" is the line number,
|
|
# 0-based wrt the start of the string, of the first source line.
|
|
|
|
def _extract_examples(s):
|
|
isPS1, isPS2 = _isPS1, _isPS2
|
|
isEmpty, isComment = _isEmpty, _isComment
|
|
examples = []
|
|
lines = s.split("\n")
|
|
i, n = 0, len(lines)
|
|
while i < n:
|
|
line = lines[i]
|
|
i = i + 1
|
|
m = isPS1(line)
|
|
if m is None:
|
|
continue
|
|
j = m.end(0) # beyond the prompt
|
|
if isEmpty(line, j) or isComment(line, j):
|
|
# a bare prompt or comment -- not interesting
|
|
continue
|
|
lineno = i - 1
|
|
if line[j] != " ":
|
|
raise ValueError("line " + `lineno` + " of docstring lacks "
|
|
"blank after " + PS1 + ": " + line)
|
|
j = j + 1
|
|
blanks = m.group(1)
|
|
nblanks = len(blanks)
|
|
# suck up this and following PS2 lines
|
|
source = []
|
|
while 1:
|
|
source.append(line[j:])
|
|
line = lines[i]
|
|
m = isPS2(line)
|
|
if m:
|
|
if m.group(1) != blanks:
|
|
raise ValueError("inconsistent leading whitespace "
|
|
"in line " + `i` + " of docstring: " + line)
|
|
i = i + 1
|
|
else:
|
|
break
|
|
if len(source) == 1:
|
|
source = source[0]
|
|
else:
|
|
# get rid of useless null line from trailing empty "..."
|
|
if source[-1] == "":
|
|
del source[-1]
|
|
source = "\n".join(source) + "\n"
|
|
# suck up response
|
|
if isPS1(line) or isEmpty(line):
|
|
expect = ""
|
|
else:
|
|
expect = []
|
|
while 1:
|
|
if line[:nblanks] != blanks:
|
|
raise ValueError("inconsistent leading whitespace "
|
|
"in line " + `i` + " of docstring: " + line)
|
|
expect.append(line[nblanks:])
|
|
i = i + 1
|
|
line = lines[i]
|
|
if isPS1(line) or isEmpty(line):
|
|
break
|
|
expect = "\n".join(expect) + "\n"
|
|
examples.append( (source, expect, lineno) )
|
|
return examples
|
|
|
|
# Capture stdout when running examples.
|
|
|
|
class _SpoofOut:
|
|
def __init__(self):
|
|
self.clear()
|
|
def write(self, s):
|
|
self.buf.append(s)
|
|
def get(self):
|
|
guts = "".join(self.buf)
|
|
# If anything at all was written, make sure there's a trailing
|
|
# newline. There's no way for the expected output to indicate
|
|
# that a trailing newline is missing.
|
|
if guts and not guts.endswith("\n"):
|
|
guts = guts + "\n"
|
|
# Prevent softspace from screwing up the next test case, in
|
|
# case they used print with a trailing comma in an example.
|
|
if hasattr(self, "softspace"):
|
|
del self.softspace
|
|
return guts
|
|
def clear(self):
|
|
self.buf = []
|
|
if hasattr(self, "softspace"):
|
|
del self.softspace
|
|
def flush(self):
|
|
# JPython calls flush
|
|
pass
|
|
|
|
# Display some tag-and-msg pairs nicely, keeping the tag and its msg
|
|
# on the same line when that makes sense.
|
|
|
|
def _tag_out(printer, *tag_msg_pairs):
|
|
for tag, msg in tag_msg_pairs:
|
|
printer(tag + ":")
|
|
msg_has_nl = msg[-1:] == "\n"
|
|
msg_has_two_nl = msg_has_nl and \
|
|
msg.find("\n") < len(msg) - 1
|
|
if len(tag) + len(msg) < 76 and not msg_has_two_nl:
|
|
printer(" ")
|
|
else:
|
|
printer("\n")
|
|
printer(msg)
|
|
if not msg_has_nl:
|
|
printer("\n")
|
|
|
|
# Run list of examples, in context globs. "out" can be used to display
|
|
# stuff to "the real" stdout, and fakeout is an instance of _SpoofOut
|
|
# that captures the examples' std output. Return (#failures, #tries).
|
|
|
|
def _run_examples_inner(out, fakeout, examples, globs, verbose, name,
|
|
compileflags):
|
|
import sys, traceback
|
|
OK, BOOM, FAIL = range(3)
|
|
NADA = "nothing"
|
|
stderr = _SpoofOut()
|
|
failures = 0
|
|
for source, want, lineno in examples:
|
|
if verbose:
|
|
_tag_out(out, ("Trying", source),
|
|
("Expecting", want or NADA))
|
|
fakeout.clear()
|
|
try:
|
|
exec compile(source, "<string>", "single",
|
|
compileflags, 1) in globs
|
|
got = fakeout.get()
|
|
state = OK
|
|
except:
|
|
# See whether the exception was expected.
|
|
if want.find("Traceback (innermost last):\n") == 0 or \
|
|
want.find("Traceback (most recent call last):\n") == 0:
|
|
# Only compare exception type and value - the rest of
|
|
# the traceback isn't necessary.
|
|
want = want.split('\n')[-2] + '\n'
|
|
exc_type, exc_val = sys.exc_info()[:2]
|
|
got = traceback.format_exception_only(exc_type, exc_val)[-1]
|
|
state = OK
|
|
else:
|
|
# unexpected exception
|
|
stderr.clear()
|
|
traceback.print_exc(file=stderr)
|
|
state = BOOM
|
|
|
|
if state == OK:
|
|
if got == want:
|
|
if verbose:
|
|
out("ok\n")
|
|
continue
|
|
state = FAIL
|
|
|
|
assert state in (FAIL, BOOM)
|
|
failures = failures + 1
|
|
out("*" * 65 + "\n")
|
|
_tag_out(out, ("Failure in example", source))
|
|
out("from line #" + `lineno` + " of " + name + "\n")
|
|
if state == FAIL:
|
|
_tag_out(out, ("Expected", want or NADA), ("Got", got))
|
|
else:
|
|
assert state == BOOM
|
|
_tag_out(out, ("Exception raised", stderr.get()))
|
|
|
|
return failures, len(examples)
|
|
|
|
# Get the future-flags associated with the future features that have been
|
|
# imported into globs.
|
|
|
|
def _extract_future_flags(globs):
|
|
flags = 0
|
|
for fname in __future__.all_feature_names:
|
|
feature = globs.get(fname, None)
|
|
if feature is getattr(__future__, fname):
|
|
flags |= feature.compiler_flag
|
|
return flags
|
|
|
|
# Run list of examples, in a shallow copy of context (dict) globs.
|
|
# Return (#failures, #tries).
|
|
|
|
def _run_examples(examples, globs, verbose, name, compileflags):
|
|
import sys
|
|
saveout = sys.stdout
|
|
globs = globs.copy()
|
|
try:
|
|
sys.stdout = fakeout = _SpoofOut()
|
|
x = _run_examples_inner(saveout.write, fakeout, examples,
|
|
globs, verbose, name, compileflags)
|
|
finally:
|
|
sys.stdout = saveout
|
|
# While Python gc can clean up most cycles on its own, it doesn't
|
|
# chase frame objects. This is especially irksome when running
|
|
# generator tests that raise exceptions, because a named generator-
|
|
# iterator gets an entry in globs, and the generator-iterator
|
|
# object's frame's traceback info points back to globs. This is
|
|
# easy to break just by clearing the namespace. This can also
|
|
# help to break other kinds of cycles, and even for cycles that
|
|
# gc can break itself it's better to break them ASAP.
|
|
globs.clear()
|
|
return x
|
|
|
|
def run_docstring_examples(f, globs, verbose=0, name="NoName",
|
|
compileflags=None):
|
|
"""f, globs, verbose=0, name="NoName" -> run examples from f.__doc__.
|
|
|
|
Use (a shallow copy of) dict globs as the globals for execution.
|
|
Return (#failures, #tries).
|
|
|
|
If optional arg verbose is true, print stuff even if there are no
|
|
failures.
|
|
Use string name in failure msgs.
|
|
"""
|
|
|
|
try:
|
|
doc = f.__doc__
|
|
if not doc:
|
|
# docstring empty or None
|
|
return 0, 0
|
|
# just in case CT invents a doc object that has to be forced
|
|
# to look like a string <0.9 wink>
|
|
doc = str(doc)
|
|
except:
|
|
return 0, 0
|
|
|
|
e = _extract_examples(doc)
|
|
if not e:
|
|
return 0, 0
|
|
if compileflags is None:
|
|
compileflags = _extract_future_flags(globs)
|
|
return _run_examples(e, globs, verbose, name, compileflags)
|
|
|
|
def is_private(prefix, base):
|
|
"""prefix, base -> true iff name prefix + "." + base is "private".
|
|
|
|
Prefix may be an empty string, and base does not contain a period.
|
|
Prefix is ignored (although functions you write conforming to this
|
|
protocol may make use of it).
|
|
Return true iff base begins with an (at least one) underscore, but
|
|
does not both begin and end with (at least) two underscores.
|
|
|
|
>>> is_private("a.b", "my_func")
|
|
0
|
|
>>> is_private("____", "_my_func")
|
|
1
|
|
>>> is_private("someclass", "__init__")
|
|
0
|
|
>>> is_private("sometypo", "__init_")
|
|
1
|
|
>>> is_private("x.y.z", "_")
|
|
1
|
|
>>> is_private("_x.y.z", "__")
|
|
0
|
|
>>> is_private("", "") # senseless but consistent
|
|
0
|
|
"""
|
|
|
|
return base[:1] == "_" and not base[:2] == "__" == base[-2:]
|
|
|
|
# Determine if a class of function was defined in the given module.
|
|
|
|
def _from_module(module, object):
|
|
if _isfunction(object):
|
|
return module.__dict__ is object.func_globals
|
|
if _isclass(object):
|
|
return module.__name__ == object.__module__
|
|
raise ValueError("object must be a class or function")
|
|
|
|
class Tester:
|
|
"""Class Tester -- runs docstring examples and accumulates stats.
|
|
|
|
In normal use, function doctest.testmod() hides all this from you,
|
|
so use that if you can. Create your own instances of Tester to do
|
|
fancier things.
|
|
|
|
Methods:
|
|
runstring(s, name)
|
|
Search string s for examples to run; use name for logging.
|
|
Return (#failures, #tries).
|
|
|
|
rundoc(object, name=None)
|
|
Search object.__doc__ for examples to run; use name (or
|
|
object.__name__) for logging. Return (#failures, #tries).
|
|
|
|
rundict(d, name, module=None)
|
|
Search for examples in docstrings in all of d.values(); use name
|
|
for logging. Exclude functions and classes not defined in module
|
|
if specified. Return (#failures, #tries).
|
|
|
|
run__test__(d, name)
|
|
Treat dict d like module.__test__. Return (#failures, #tries).
|
|
|
|
summarize(verbose=None)
|
|
Display summary of testing results, to stdout. Return
|
|
(#failures, #tries).
|
|
|
|
merge(other)
|
|
Merge in the test results from Tester instance "other".
|
|
|
|
>>> from doctest import Tester
|
|
>>> t = Tester(globs={'x': 42}, verbose=0)
|
|
>>> t.runstring(r'''
|
|
... >>> x = x * 2
|
|
... >>> print x
|
|
... 42
|
|
... ''', 'XYZ')
|
|
*****************************************************************
|
|
Failure in example: print x
|
|
from line #2 of XYZ
|
|
Expected: 42
|
|
Got: 84
|
|
(1, 2)
|
|
>>> t.runstring(">>> x = x * 2\\n>>> print x\\n84\\n", 'example2')
|
|
(0, 2)
|
|
>>> t.summarize()
|
|
*****************************************************************
|
|
1 items had failures:
|
|
1 of 2 in XYZ
|
|
***Test Failed*** 1 failures.
|
|
(1, 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.
|
|
(1, 4)
|
|
>>>
|
|
"""
|
|
|
|
def __init__(self, mod=None, globs=None, verbose=None,
|
|
isprivate=None):
|
|
"""mod=None, globs=None, verbose=None, isprivate=None
|
|
|
|
See doctest.__doc__ for an overview.
|
|
|
|
Optional keyword arg "mod" is a module, whose globals are used for
|
|
executing examples. If not specified, globs must be specified.
|
|
|
|
Optional keyword arg "globs" gives a dict to be used as the globals
|
|
when executing examples; if not specified, use the globals from
|
|
module mod.
|
|
|
|
In either case, a copy of the dict is used for each docstring
|
|
examined.
|
|
|
|
Optional keyword arg "verbose" prints lots of stuff if true, only
|
|
failures if false; by default, it's true iff "-v" is in sys.argv.
|
|
|
|
Optional keyword arg "isprivate" specifies a function used to determine
|
|
whether a name is private. The default function is doctest.is_private;
|
|
see its docs for details.
|
|
"""
|
|
|
|
if mod is None and globs is None:
|
|
raise TypeError("Tester.__init__: must specify mod or globs")
|
|
if mod is not None and not _ismodule(mod):
|
|
raise TypeError("Tester.__init__: mod must be a module; " +
|
|
`mod`)
|
|
if globs is None:
|
|
globs = mod.__dict__
|
|
self.globs = globs
|
|
|
|
if verbose is None:
|
|
import sys
|
|
verbose = "-v" in sys.argv
|
|
self.verbose = verbose
|
|
|
|
if isprivate is None:
|
|
isprivate = is_private
|
|
self.isprivate = isprivate
|
|
|
|
self.name2ft = {} # map name to (#failures, #trials) pair
|
|
|
|
self.compileflags = _extract_future_flags(globs)
|
|
|
|
def runstring(self, s, name):
|
|
"""
|
|
s, name -> search string s for examples to run, logging as name.
|
|
|
|
Use string name as the key for logging the outcome.
|
|
Return (#failures, #examples).
|
|
|
|
>>> 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
|
|
(0, 2)
|
|
"""
|
|
|
|
if self.verbose:
|
|
print "Running string", name
|
|
f = t = 0
|
|
e = _extract_examples(s)
|
|
if e:
|
|
f, t = _run_examples(e, self.globs, self.verbose, name,
|
|
self.compileflags)
|
|
if self.verbose:
|
|
print f, "of", t, "examples failed in string", name
|
|
self.__record_outcome(name, f, t)
|
|
return f, t
|
|
|
|
def rundoc(self, object, name=None):
|
|
"""
|
|
object, name=None -> search object.__doc__ for examples to run.
|
|
|
|
Use optional string name as the key for logging the outcome;
|
|
by default use object.__name__.
|
|
Return (#failures, #examples).
|
|
If object is a class object, search recursively for method
|
|
docstrings too.
|
|
object.__doc__ is examined regardless of name, but if object is
|
|
a class, whether private names reached from object are searched
|
|
depends on the constructor's "isprivate" argument.
|
|
|
|
>>> t = Tester(globs={}, verbose=0)
|
|
>>> def _f():
|
|
... '''Trivial docstring example.
|
|
... >>> assert 2 == 2
|
|
... '''
|
|
... return 32
|
|
...
|
|
>>> t.rundoc(_f) # expect 0 failures in 1 example
|
|
(0, 1)
|
|
"""
|
|
|
|
if name is None:
|
|
try:
|
|
name = object.__name__
|
|
except AttributeError:
|
|
raise ValueError("Tester.rundoc: name must be given "
|
|
"when object.__name__ doesn't exist; " + `object`)
|
|
if self.verbose:
|
|
print "Running", name + ".__doc__"
|
|
f, t = run_docstring_examples(object, self.globs, self.verbose, name,
|
|
self.compileflags)
|
|
if self.verbose:
|
|
print f, "of", t, "examples failed in", name + ".__doc__"
|
|
self.__record_outcome(name, f, t)
|
|
if _isclass(object):
|
|
# In 2.2, class and static methods complicate life. Build
|
|
# a dict "that works", by hook or by crook.
|
|
d = {}
|
|
for tag, kind, homecls, value in _classify_class_attrs(object):
|
|
|
|
if homecls is not object:
|
|
# Only look at names defined immediately by the class.
|
|
continue
|
|
|
|
elif self.isprivate(name, tag):
|
|
continue
|
|
|
|
elif kind == "method":
|
|
# value is already a function
|
|
d[tag] = value
|
|
|
|
elif kind == "static method":
|
|
# value isn't a function, but getattr reveals one
|
|
d[tag] = getattr(object, tag)
|
|
|
|
elif kind == "class method":
|
|
# Hmm. A classmethod object doesn't seem to reveal
|
|
# enough. But getattr turns it into a bound method,
|
|
# and from there .im_func retrieves the underlying
|
|
# function.
|
|
d[tag] = getattr(object, tag).im_func
|
|
|
|
elif kind == "property":
|
|
# The methods implementing the property have their
|
|
# own docstrings -- but the property may have one too.
|
|
if value.__doc__ is not None:
|
|
d[tag] = str(value.__doc__)
|
|
|
|
elif kind == "data":
|
|
# Grab nested classes.
|
|
if _isclass(value):
|
|
d[tag] = value
|
|
|
|
else:
|
|
raise ValueError("teach doctest about %r" % kind)
|
|
|
|
f2, t2 = self.run__test__(d, name)
|
|
f += f2
|
|
t += t2
|
|
|
|
return f, t
|
|
|
|
def rundict(self, d, name, module=None):
|
|
"""
|
|
d, name, module=None -> search for docstring examples in d.values().
|
|
|
|
For k, v in d.items() such that v is a function or class,
|
|
do self.rundoc(v, name + "." + k). Whether this includes
|
|
objects with private names depends on the constructor's
|
|
"isprivate" argument. If module is specified, functions and
|
|
classes that are not defined in module are excluded.
|
|
Return aggregate (#failures, #examples).
|
|
|
|
Build and populate two modules with sample functions to test that
|
|
exclusion of external functions and classes works.
|
|
|
|
>>> import new
|
|
>>> m1 = new.module('_m1')
|
|
>>> m2 = new.module('_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:
|
|
|
|
>>> t = Tester(globs={}, verbose=0)
|
|
>>> t.rundict(m1.__dict__, "rundict_test", m1) # _f, f2 and g2 and h2 skipped
|
|
(0, 3)
|
|
|
|
Again, but with a custom isprivate function allowing _f:
|
|
|
|
>>> t = Tester(globs={}, verbose=0, isprivate=lambda x,y: 0)
|
|
>>> t.rundict(m1.__dict__, "rundict_test_pvt", m1) # Only f2, g2 and h2 skipped
|
|
(0, 4)
|
|
|
|
And once more, not excluding stuff outside m1:
|
|
|
|
>>> t = Tester(globs={}, verbose=0, isprivate=lambda x,y: 0)
|
|
>>> t.rundict(m1.__dict__, "rundict_test_pvt") # None are skipped.
|
|
(0, 8)
|
|
|
|
The exclusion of objects from outside the designated module is
|
|
meant to be invoked automagically by testmod.
|
|
|
|
>>> testmod(m1)
|
|
(0, 3)
|
|
|
|
"""
|
|
|
|
if not hasattr(d, "items"):
|
|
raise TypeError("Tester.rundict: d must support .items(); " +
|
|
`d`)
|
|
f = t = 0
|
|
# Run the tests by alpha order of names, for consistency in
|
|
# verbose-mode output.
|
|
names = d.keys()
|
|
names.sort()
|
|
for thisname in names:
|
|
value = d[thisname]
|
|
if _isfunction(value) or _isclass(value):
|
|
if module and not _from_module(module, value):
|
|
continue
|
|
f2, t2 = self.__runone(value, name + "." + thisname)
|
|
f = f + f2
|
|
t = t + t2
|
|
return f, t
|
|
|
|
def run__test__(self, d, name):
|
|
"""d, name -> Treat dict d like module.__test__.
|
|
|
|
Return (#failures, #tries).
|
|
See testmod.__doc__ for details.
|
|
"""
|
|
|
|
failures = tries = 0
|
|
prefix = name + "."
|
|
savepvt = self.isprivate
|
|
try:
|
|
self.isprivate = lambda *args: 0
|
|
# Run the tests by alpha order of names, for consistency in
|
|
# verbose-mode output.
|
|
keys = d.keys()
|
|
keys.sort()
|
|
for k in keys:
|
|
v = d[k]
|
|
thisname = prefix + k
|
|
if type(v) in _StringTypes:
|
|
f, t = self.runstring(v, thisname)
|
|
elif _isfunction(v) or _isclass(v):
|
|
f, t = self.rundoc(v, thisname)
|
|
else:
|
|
raise TypeError("Tester.run__test__: values in "
|
|
"dict must be strings, functions "
|
|
"or classes; " + `v`)
|
|
failures = failures + f
|
|
tries = tries + t
|
|
finally:
|
|
self.isprivate = savepvt
|
|
return failures, tries
|
|
|
|
def summarize(self, verbose=None):
|
|
"""
|
|
verbose=None -> summarize results, return (#failures, #tests).
|
|
|
|
Print summary of test results to stdout.
|
|
Optional arg 'verbose' controls how wordy this is. By
|
|
default, use the verbose setting established by the
|
|
constructor.
|
|
"""
|
|
|
|
if verbose is None:
|
|
verbose = self.verbose
|
|
notests = []
|
|
passed = []
|
|
failed = []
|
|
totalt = totalf = 0
|
|
for x in self.name2ft.items():
|
|
name, (f, t) = x
|
|
assert f <= t
|
|
totalt = totalt + t
|
|
totalf = totalf + f
|
|
if t == 0:
|
|
notests.append(name)
|
|
elif f == 0:
|
|
passed.append( (name, t) )
|
|
else:
|
|
failed.append(x)
|
|
if verbose:
|
|
if notests:
|
|
print len(notests), "items had no tests:"
|
|
notests.sort()
|
|
for thing in notests:
|
|
print " ", thing
|
|
if passed:
|
|
print len(passed), "items passed all tests:"
|
|
passed.sort()
|
|
for thing, count in passed:
|
|
print " %3d tests in %s" % (count, thing)
|
|
if failed:
|
|
print "*" * 65
|
|
print len(failed), "items had failures:"
|
|
failed.sort()
|
|
for thing, (f, t) in failed:
|
|
print " %3d of %3d in %s" % (f, t, thing)
|
|
if verbose:
|
|
print totalt, "tests in", len(self.name2ft), "items."
|
|
print totalt - totalf, "passed and", totalf, "failed."
|
|
if totalf:
|
|
print "***Test Failed***", totalf, "failures."
|
|
elif verbose:
|
|
print "Test passed."
|
|
return totalf, totalt
|
|
|
|
def merge(self, other):
|
|
"""
|
|
other -> merge in test results from the other Tester instance.
|
|
|
|
If self and other both have a test result for something
|
|
with the same name, the (#failures, #tests) results are
|
|
summed, and a warning is printed to stdout.
|
|
|
|
>>> from doctest import Tester
|
|
>>> t1 = Tester(globs={}, verbose=0)
|
|
>>> t1.runstring('''
|
|
... >>> x = 12
|
|
... >>> print x
|
|
... 12
|
|
... ''', "t1example")
|
|
(0, 2)
|
|
>>>
|
|
>>> t2 = Tester(globs={}, verbose=0)
|
|
>>> t2.runstring('''
|
|
... >>> x = 13
|
|
... >>> print x
|
|
... 13
|
|
... ''', "t2example")
|
|
(0, 2)
|
|
>>> common = ">>> assert 1 + 2 == 3\\n"
|
|
>>> t1.runstring(common, "common")
|
|
(0, 1)
|
|
>>> t2.runstring(common, "common")
|
|
(0, 1)
|
|
>>> t1.merge(t2)
|
|
*** Tester.merge: 'common' in both testers; summing outcomes.
|
|
>>> t1.summarize(1)
|
|
3 items passed all tests:
|
|
2 tests in common
|
|
2 tests in t1example
|
|
2 tests in t2example
|
|
6 tests in 3 items.
|
|
6 passed and 0 failed.
|
|
Test passed.
|
|
(0, 6)
|
|
>>>
|
|
"""
|
|
|
|
d = self.name2ft
|
|
for name, (f, t) in other.name2ft.items():
|
|
if d.has_key(name):
|
|
print "*** Tester.merge: '" + name + "' in both" \
|
|
" testers; summing outcomes."
|
|
f2, t2 = d[name]
|
|
f = f + f2
|
|
t = t + t2
|
|
d[name] = f, t
|
|
|
|
def __record_outcome(self, name, f, t):
|
|
if self.name2ft.has_key(name):
|
|
print "*** Warning: '" + name + "' was tested before;", \
|
|
"summing outcomes."
|
|
f2, t2 = self.name2ft[name]
|
|
f = f + f2
|
|
t = t + t2
|
|
self.name2ft[name] = f, t
|
|
|
|
def __runone(self, target, name):
|
|
if "." in name:
|
|
i = name.rindex(".")
|
|
prefix, base = name[:i], name[i+1:]
|
|
else:
|
|
prefix, base = "", base
|
|
if self.isprivate(prefix, base):
|
|
return 0, 0
|
|
return self.rundoc(target, name)
|
|
|
|
master = None
|
|
|
|
def testmod(m, name=None, globs=None, verbose=None, isprivate=None,
|
|
report=1):
|
|
"""m, name=None, globs=None, verbose=None, isprivate=None, report=1
|
|
|
|
Test examples in docstrings in functions and classes reachable from
|
|
module m, starting with m.__doc__. Private names are skipped.
|
|
|
|
Also test examples reachable from dict m.__test__ if it exists and is
|
|
not None. m.__dict__ maps names to functions, classes and strings;
|
|
function and class docstrings are tested even if the name is private;
|
|
strings are tested directly, as if they were docstrings.
|
|
|
|
Return (#failures, #tests).
|
|
|
|
See doctest.__doc__ for an overview.
|
|
|
|
Optional keyword arg "name" gives the name of the module; by default
|
|
use m.__name__.
|
|
|
|
Optional keyword arg "globs" gives a dict to be used as the globals
|
|
when executing examples; by default, use m.__dict__. A copy of this
|
|
dict is actually used for each docstring, so that each docstring's
|
|
examples start with a clean slate.
|
|
|
|
Optional keyword arg "verbose" prints lots of stuff if true, prints
|
|
only failures if false; by default, it's true iff "-v" is in sys.argv.
|
|
|
|
Optional keyword arg "isprivate" specifies a function used to
|
|
determine whether a name is private. The default function is
|
|
doctest.is_private; see its docs for details.
|
|
|
|
Optional keyword arg "report" prints a summary at the end when true,
|
|
else prints nothing at the end. In verbose mode, the summary is
|
|
detailed, else very brief (in fact, empty if all tests passed).
|
|
|
|
Advanced tomfoolery: testmod runs methods of a local instance of
|
|
class doctest.Tester, then merges the results into (or creates)
|
|
global Tester instance doctest.master. Methods of doctest.master
|
|
can be called directly too, if you want to do something unusual.
|
|
Passing report=0 to testmod is especially useful then, to delay
|
|
displaying a summary. Invoke doctest.master.summarize(verbose)
|
|
when you're done fiddling.
|
|
"""
|
|
|
|
global master
|
|
|
|
if not _ismodule(m):
|
|
raise TypeError("testmod: module required; " + `m`)
|
|
if name is None:
|
|
name = m.__name__
|
|
tester = Tester(m, globs=globs, verbose=verbose, isprivate=isprivate)
|
|
failures, tries = tester.rundoc(m, name)
|
|
f, t = tester.rundict(m.__dict__, name, m)
|
|
failures = failures + f
|
|
tries = tries + t
|
|
if hasattr(m, "__test__"):
|
|
testdict = m.__test__
|
|
if testdict:
|
|
if not hasattr(testdict, "items"):
|
|
raise TypeError("testmod: module.__test__ must support "
|
|
".items(); " + `testdict`)
|
|
f, t = tester.run__test__(testdict, name + ".__test__")
|
|
failures = failures + f
|
|
tries = tries + t
|
|
if report:
|
|
tester.summarize()
|
|
if master is None:
|
|
master = tester
|
|
else:
|
|
master.merge(tester)
|
|
return failures, tries
|
|
|
|
class _TestClass:
|
|
"""
|
|
A pointless class, for sanity-checking of docstring testing.
|
|
|
|
Methods:
|
|
square()
|
|
get()
|
|
|
|
>>> _TestClass(13).get() + _TestClass(-12).get()
|
|
1
|
|
>>> hex(_TestClass(13).square().get())
|
|
'0xa9'
|
|
"""
|
|
|
|
def __init__(self, val):
|
|
"""val -> _TestClass object with associated value val.
|
|
|
|
>>> t = _TestClass(123)
|
|
>>> print t.get()
|
|
123
|
|
"""
|
|
|
|
self.val = val
|
|
|
|
def square(self):
|
|
"""square() -> square TestClass's associated value
|
|
|
|
>>> _TestClass(13).square().get()
|
|
169
|
|
"""
|
|
|
|
self.val = self.val ** 2
|
|
return self
|
|
|
|
def get(self):
|
|
"""get() -> return TestClass's associated value.
|
|
|
|
>>> x = _TestClass(-42)
|
|
>>> print x.get()
|
|
-42
|
|
"""
|
|
|
|
return self.val
|
|
|
|
__test__ = {"_TestClass": _TestClass,
|
|
"string": r"""
|
|
Example of a string object, searched as-is.
|
|
>>> x = 1; y = 2
|
|
>>> x + y, x * y
|
|
(3, 2)
|
|
"""
|
|
}
|
|
|
|
def _test():
|
|
import doctest
|
|
return doctest.testmod(doctest)
|
|
|
|
if __name__ == "__main__":
|
|
_test()
|