r"""Doctests in TestCase classes
"""
import doctest
import inspect
import os
import re
import sys
import types
__all__ = [
'doctestmethod',
'method',
'docteststring',
'string',
'doctestfile',
'file',
'doctestfiles',
'files',
]
_parser = doctest.DocTestParser()
def _testify(name):
if not name.startswith('test'):
name = 'test_' + name
return name
[docs]
def doctestmethod(test=None, optionflags=0, checker=None):
"""Define a doctest from a method within a unittest.TestCase.
The method's doc string provides the test source. Its body is
called before the test and may perform test-specific setup.
You can pass doctest option flags and a custon checker.
Variables defined in the enclosing module are available in the test.
If a test case defines a globs attribute, it must be a dictionary
and its contents are added to the test globals.
The test object is available as the variable ``self`` in the test.
"""
if test is None:
return lambda test: _doctestmethod(test, optionflags, checker)
return _doctestmethod(test, optionflags, checker)
#: Alias of `doctestmethod`
method = doctestmethod
def _doctestmethod(test, optionflags, checker):
doc = test.__doc__
if not doc:
raise ValueError(test, "has no docstring")
setup = test
name = test.__name__
path = inspect.getsourcefile(test)
lineno = inspect.getsourcelines(test)[1]
fglobs = sys._getframe(3).f_globals
def test_method(self):
setup(self)
_run_test(self, doc, fglobs.copy(), name, path,
optionflags, checker, lineno=lineno)
test_method.__name__ = _testify(name)
return test_method
[docs]
def docteststring(test, optionflags=0, checker=None, name=None):
"""Define a doctest from a string within a unittest.TestCase.
You can pass doctest option flags and a custon checker.
Variables defined in the enclosing module are available in the test.
If a test case defines a globs attribute, it must be a dictionary
and its contents are added to the test globals.
The test object is available as the variable ``self`` in the test.
"""
fglobs = sys._getframe(2).f_globals
def test_string(self):
_run_test(self, test, fglobs.copy(), '<string>', '<string>',
optionflags, checker)
if name:
test_string.__name__ = _testify(name)
return test_string
#: Alias of `docteststring`
string = docteststring
_not_word = re.compile(r'\W')
[docs]
def doctestfile(path, optionflags=0, checker=None):
"""Define a doctest from a test file within a unittest.TestCase.
The file path may be relative or absolute. If its relative (the
common case), it will be interpreted relative to the directory
containing the referencing module.
You can pass doctest option flags and a custon checker.
If a test case defines a globs attribute, it must be a dictionary
and its contents are added to the test globals.
The test object is available as the variable ``test`` in the test.
The resulting object can be used as a function decorator. The
decorated method is called before the test and may perform
test-specific setup. (The decorated method's doc string is ignored.)
"""
base = os.path.dirname(os.path.abspath(
sys._getframe(2).f_globals['__file__']
))
path = os.path.join(base, path)
with open(path) as f:
test = f.read()
name = os.path.basename(path)
def test_file(self):
if isinstance(self, types.FunctionType):
setup = self
def test_file_w_setup(self):
setup(self)
_run_test(self, test, {}, name, path, optionflags, checker,
'test')
test_file_w_setup.__name__ = _testify(setup.__name__)
test_file_w_setup.filepath = path
test_file_w_setup.filename = os.path.basename(path)
return test_file_w_setup
_run_test(self, test, {}, name, path, optionflags, checker, 'test')
test_file.__name__ = name_from_path(path)
test_file.filepath = path
test_file.filename = os.path.basename(path)
return test_file
#: Alias of `doctestfile`
file = doctestfile
[docs]
def doctestfiles(*paths, **kw):
"""Define doctests from test files in a decorated class.
Multiple files can be specified. A member is added to the
decorated class for each file.
The file paths may be relative or absolute. If relative (the
common case), they will be interpreted relative to the directory
containing the referencing module.
You can pass doctest option flags and a custon checker.
If a test case defines a globs attribute, it must be a dictionary
and its contents are added to the test globals.
The test object is available as the variable ``test`` in the test.
The resulting object must be used as a class decorator.
"""
def doctestfiles_(class_):
for path in paths:
name = name_from_path(path)
test = doctestfile(path, **kw)
test.__name__ = name
setattr(class_, name, test)
return class_
return doctestfiles_
#: Alias of `doctestfiles`
files = doctestfiles
def name_from_path(path):
return _testify(
_not_word.sub('_', os.path.splitext(os.path.basename(path))[0])
)
def _run_test(self, test, globs, name, path,
optionflags, checker, testname='self', lineno=0):
globs.update(getattr(self, 'globs', ()))
globs[testname] = self
optionflags |= doctest.IGNORE_EXCEPTION_DETAIL
doctest.DocTestCase(
_parser.get_doctest(test, globs, name, path, lineno),
optionflags=optionflags,
checker=checker,
).runTest()