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- Issue #16662: load_tests() is now unconditionally run when it is present in
a package's __init__.py. TestLoader.loadTestsFromModule() still accepts use_load_tests, but it is deprecated and ignored. A new keyword-only attribute `pattern` is added and documented. Patch given by Robert Collins, tweaked by Barry Warsaw.
This commit is contained in:
Barry Warsaw
parent
238f5aa6a5
commit
d78742a260
5 changed files with 472 additions and 61 deletions
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@ -6,6 +6,7 @@ import sys
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import traceback
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import types
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import functools
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import warnings
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from fnmatch import fnmatch
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@ -70,8 +71,27 @@ class TestLoader(object):
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loaded_suite = self.suiteClass(map(testCaseClass, testCaseNames))
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return loaded_suite
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def loadTestsFromModule(self, module, use_load_tests=True):
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# XXX After Python 3.5, remove backward compatibility hacks for
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# use_load_tests deprecation via *args and **kws. See issue 16662.
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def loadTestsFromModule(self, module, *args, pattern=None, **kws):
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"""Return a suite of all tests cases contained in the given module"""
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# This method used to take an undocumented and unofficial
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# use_load_tests argument. For backward compatibility, we still
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# accept the argument (which can also be the first position) but we
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# ignore it and issue a deprecation warning if it's present.
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if len(args) == 1 or 'use_load_tests' in kws:
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warnings.warn('use_load_tests is deprecated and ignored',
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DeprecationWarning)
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kws.pop('use_load_tests', None)
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if len(args) > 1:
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raise TypeError('loadTestsFromModule() takes 1 positional argument but {} were given'.format(len(args)))
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if len(kws) != 0:
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# Since the keyword arguments are unsorted (see PEP 468), just
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# pick the alphabetically sorted first argument to complain about,
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# if multiple were given. At least the error message will be
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# predictable.
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complaint = sorted(kws)[0]
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raise TypeError("loadTestsFromModule() got an unexpected keyword argument '{}'".format(complaint))
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tests = []
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for name in dir(module):
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obj = getattr(module, name)
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@ -80,9 +100,9 @@ class TestLoader(object):
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load_tests = getattr(module, 'load_tests', None)
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tests = self.suiteClass(tests)
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if use_load_tests and load_tests is not None:
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if load_tests is not None:
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try:
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return load_tests(self, tests, None)
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return load_tests(self, tests, pattern)
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except Exception as e:
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return _make_failed_load_tests(module.__name__, e,
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self.suiteClass)
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@ -325,7 +345,7 @@ class TestLoader(object):
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msg = ("%r module incorrectly imported from %r. Expected %r. "
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"Is this module globally installed?")
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raise ImportError(msg % (mod_name, module_dir, expected_dir))
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yield self.loadTestsFromModule(module)
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yield self.loadTestsFromModule(module, pattern=pattern)
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elif os.path.isdir(full_path):
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if (not namespace and
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not os.path.isfile(os.path.join(full_path, '__init__.py'))):
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@ -333,26 +353,27 @@ class TestLoader(object):
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load_tests = None
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tests = None
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if fnmatch(path, pattern):
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# only check load_tests if the package directory itself matches the filter
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name = self._get_name_from_path(full_path)
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name = self._get_name_from_path(full_path)
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try:
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package = self._get_module_from_name(name)
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except case.SkipTest as e:
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yield _make_skipped_test(name, e, self.suiteClass)
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except:
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yield _make_failed_import_test(name, self.suiteClass)
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else:
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load_tests = getattr(package, 'load_tests', None)
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tests = self.loadTestsFromModule(package, use_load_tests=False)
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if load_tests is None:
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tests = self.loadTestsFromModule(package, pattern=pattern)
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if tests is not None:
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# tests loaded from package file
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yield tests
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if load_tests is not None:
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# loadTestsFromModule(package) has load_tests for us.
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continue
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# recurse into the package
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yield from self._find_tests(full_path, pattern,
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namespace=namespace)
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else:
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try:
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yield load_tests(self, tests, pattern)
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except Exception as e:
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yield _make_failed_load_tests(package.__name__, e,
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self.suiteClass)
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defaultTestLoader = TestLoader()
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@ -68,7 +68,13 @@ class TestDiscovery(unittest.TestCase):
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self.addCleanup(restore_isfile)
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loader._get_module_from_name = lambda path: path + ' module'
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loader.loadTestsFromModule = lambda module: module + ' tests'
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orig_load_tests = loader.loadTestsFromModule
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def loadTestsFromModule(module, pattern=None):
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# This is where load_tests is called.
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base = orig_load_tests(module, pattern=pattern)
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return base + [module + ' tests']
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loader.loadTestsFromModule = loadTestsFromModule
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loader.suiteClass = lambda thing: thing
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top_level = os.path.abspath('/foo')
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loader._top_level_dir = top_level
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@ -76,9 +82,9 @@ class TestDiscovery(unittest.TestCase):
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# The test suites found should be sorted alphabetically for reliable
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# execution order.
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expected = [name + ' module tests' for name in
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('test1', 'test2')]
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expected.extend([('test_dir.%s' % name) + ' module tests' for name in
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expected = [[name + ' module tests'] for name in
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('test1', 'test2', 'test_dir')]
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expected.extend([[('test_dir.%s' % name) + ' module tests'] for name in
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('test3', 'test4')])
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self.assertEqual(suite, expected)
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@ -116,34 +122,204 @@ class TestDiscovery(unittest.TestCase):
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if os.path.basename(path) == 'test_directory':
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def load_tests(loader, tests, pattern):
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self.load_tests_args.append((loader, tests, pattern))
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return 'load_tests'
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return [self.path + ' load_tests']
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self.load_tests = load_tests
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def __eq__(self, other):
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return self.path == other.path
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loader._get_module_from_name = lambda name: Module(name)
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def loadTestsFromModule(module, use_load_tests):
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if use_load_tests:
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raise self.failureException('use_load_tests should be False for packages')
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return module.path + ' module tests'
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orig_load_tests = loader.loadTestsFromModule
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def loadTestsFromModule(module, pattern=None):
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# This is where load_tests is called.
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base = orig_load_tests(module, pattern=pattern)
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return base + [module.path + ' module tests']
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loader.loadTestsFromModule = loadTestsFromModule
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loader.suiteClass = lambda thing: thing
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loader._top_level_dir = '/foo'
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# this time no '.py' on the pattern so that it can match
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# a test package
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suite = list(loader._find_tests('/foo', 'test*'))
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# We should have loaded tests from the test_directory package by calling load_tests
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# and directly from the test_directory2 package
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# We should have loaded tests from the a_directory and test_directory2
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# directly and via load_tests for the test_directory package, which
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# still calls the baseline module loader.
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self.assertEqual(suite,
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['load_tests', 'test_directory2' + ' module tests'])
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[['a_directory module tests'],
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['test_directory load_tests',
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'test_directory module tests'],
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['test_directory2 module tests']])
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# The test module paths should be sorted for reliable execution order
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self.assertEqual(Module.paths, ['test_directory', 'test_directory2'])
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self.assertEqual(Module.paths,
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['a_directory', 'test_directory', 'test_directory2'])
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# load_tests should have been called once with loader, tests and pattern
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# (but there are no tests in our stub module itself, so thats [] at the
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# time of call.
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self.assertEqual(Module.load_tests_args,
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[(loader, [], 'test*')])
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def test_find_tests_default_calls_package_load_tests(self):
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loader = unittest.TestLoader()
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original_listdir = os.listdir
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def restore_listdir():
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os.listdir = original_listdir
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original_isfile = os.path.isfile
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def restore_isfile():
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os.path.isfile = original_isfile
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original_isdir = os.path.isdir
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def restore_isdir():
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os.path.isdir = original_isdir
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directories = ['a_directory', 'test_directory', 'test_directory2']
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path_lists = [directories, [], [], []]
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os.listdir = lambda path: path_lists.pop(0)
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self.addCleanup(restore_listdir)
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os.path.isdir = lambda path: True
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self.addCleanup(restore_isdir)
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os.path.isfile = lambda path: os.path.basename(path) not in directories
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self.addCleanup(restore_isfile)
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class Module(object):
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paths = []
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load_tests_args = []
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def __init__(self, path):
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self.path = path
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self.paths.append(path)
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if os.path.basename(path) == 'test_directory':
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def load_tests(loader, tests, pattern):
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self.load_tests_args.append((loader, tests, pattern))
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return [self.path + ' load_tests']
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self.load_tests = load_tests
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def __eq__(self, other):
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return self.path == other.path
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loader._get_module_from_name = lambda name: Module(name)
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orig_load_tests = loader.loadTestsFromModule
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def loadTestsFromModule(module, pattern=None):
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# This is where load_tests is called.
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base = orig_load_tests(module, pattern=pattern)
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return base + [module.path + ' module tests']
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loader.loadTestsFromModule = loadTestsFromModule
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loader.suiteClass = lambda thing: thing
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loader._top_level_dir = '/foo'
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# this time no '.py' on the pattern so that it can match
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# a test package
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suite = list(loader._find_tests('/foo', 'test*.py'))
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# We should have loaded tests from the a_directory and test_directory2
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# directly and via load_tests for the test_directory package, which
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# still calls the baseline module loader.
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self.assertEqual(suite,
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[['a_directory module tests'],
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['test_directory load_tests',
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'test_directory module tests'],
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['test_directory2 module tests']])
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# The test module paths should be sorted for reliable execution order
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self.assertEqual(Module.paths,
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['a_directory', 'test_directory', 'test_directory2'])
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# load_tests should have been called once with loader, tests and pattern
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self.assertEqual(Module.load_tests_args,
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[(loader, 'test_directory' + ' module tests', 'test*')])
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[(loader, [], 'test*.py')])
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def test_find_tests_customise_via_package_pattern(self):
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# This test uses the example 'do-nothing' load_tests from
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# https://docs.python.org/3/library/unittest.html#load-tests-protocol
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# to make sure that that actually works.
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# Housekeeping
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original_listdir = os.listdir
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def restore_listdir():
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os.listdir = original_listdir
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self.addCleanup(restore_listdir)
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original_isfile = os.path.isfile
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def restore_isfile():
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os.path.isfile = original_isfile
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self.addCleanup(restore_isfile)
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original_isdir = os.path.isdir
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def restore_isdir():
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os.path.isdir = original_isdir
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self.addCleanup(restore_isdir)
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self.addCleanup(sys.path.remove, '/foo')
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# Test data: we expect the following:
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# a listdir to find our package, and a isfile and isdir check on it.
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# a module-from-name call to turn that into a module
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# followed by load_tests.
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# then our load_tests will call discover() which is messy
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# but that finally chains into find_tests again for the child dir -
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# which is why we don't have a infinite loop.
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# We expect to see:
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# the module load tests for both package and plain module called,
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# and the plain module result nested by the package module load_tests
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# indicating that it was processed and could have been mutated.
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vfs = {'/foo': ['my_package'],
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'/foo/my_package': ['__init__.py', 'test_module.py']}
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def list_dir(path):
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return list(vfs[path])
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os.listdir = list_dir
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os.path.isdir = lambda path: not path.endswith('.py')
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os.path.isfile = lambda path: path.endswith('.py')
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class Module(object):
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paths = []
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load_tests_args = []
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def __init__(self, path):
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self.path = path
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self.paths.append(path)
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if path.endswith('test_module'):
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def load_tests(loader, tests, pattern):
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self.load_tests_args.append((loader, tests, pattern))
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return [self.path + ' load_tests']
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else:
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def load_tests(loader, tests, pattern):
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self.load_tests_args.append((loader, tests, pattern))
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# top level directory cached on loader instance
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__file__ = '/foo/my_package/__init__.py'
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this_dir = os.path.dirname(__file__)
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pkg_tests = loader.discover(
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start_dir=this_dir, pattern=pattern)
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return [self.path + ' load_tests', tests
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] + pkg_tests
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self.load_tests = load_tests
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def __eq__(self, other):
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return self.path == other.path
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loader = unittest.TestLoader()
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loader._get_module_from_name = lambda name: Module(name)
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loader.suiteClass = lambda thing: thing
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loader._top_level_dir = '/foo'
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# this time no '.py' on the pattern so that it can match
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# a test package
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suite = list(loader._find_tests('/foo', 'test*.py'))
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# We should have loaded tests from both my_package and
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# my_pacakge.test_module, and also run the load_tests hook in both.
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# (normally this would be nested TestSuites.)
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self.assertEqual(suite,
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[['my_package load_tests', [],
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['my_package.test_module load_tests']]])
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# Parents before children.
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self.assertEqual(Module.paths,
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['my_package', 'my_package.test_module'])
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# load_tests should have been called twice with loader, tests and pattern
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self.assertEqual(Module.load_tests_args,
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[(loader, [], 'test*.py'),
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(loader, [], 'test*.py')])
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def test_discover(self):
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loader = unittest.TestLoader()
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@ -203,6 +379,17 @@ class TestDiscovery(unittest.TestCase):
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sys.path[:] = orig_sys_path
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self.addCleanup(restore)
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def setup_import_issue_package_tests(self, vfs):
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self.addCleanup(setattr, os, 'listdir', os.listdir)
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self.addCleanup(setattr, os.path, 'isfile', os.path.isfile)
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self.addCleanup(setattr, os.path, 'isdir', os.path.isdir)
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self.addCleanup(sys.path.__setitem__, slice(None), list(sys.path))
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def list_dir(path):
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return list(vfs[path])
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os.listdir = list_dir
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os.path.isdir = lambda path: not path.endswith('.py')
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os.path.isfile = lambda path: path.endswith('.py')
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def test_discover_with_modules_that_fail_to_import(self):
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loader = unittest.TestLoader()
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@ -216,6 +403,25 @@ class TestDiscovery(unittest.TestCase):
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with self.assertRaises(ImportError):
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test.test_this_does_not_exist()
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def test_discover_with_init_modules_that_fail_to_import(self):
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vfs = {'/foo': ['my_package'],
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'/foo/my_package': ['__init__.py', 'test_module.py']}
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self.setup_import_issue_package_tests(vfs)
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import_calls = []
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def _get_module_from_name(name):
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import_calls.append(name)
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raise ImportError("Cannot import Name")
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loader = unittest.TestLoader()
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loader._get_module_from_name = _get_module_from_name
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suite = loader.discover('/foo')
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self.assertIn('/foo', sys.path)
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self.assertEqual(suite.countTestCases(), 1)
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test = list(list(suite)[0])[0] # extract test from suite
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with self.assertRaises(ImportError):
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test.my_package()
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self.assertEqual(import_calls, ['my_package'])
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def test_discover_with_module_that_raises_SkipTest_on_import(self):
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loader = unittest.TestLoader()
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@ -232,6 +438,26 @@ class TestDiscovery(unittest.TestCase):
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suite.run(result)
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self.assertEqual(len(result.skipped), 1)
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def test_discover_with_init_module_that_raises_SkipTest_on_import(self):
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vfs = {'/foo': ['my_package'],
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'/foo/my_package': ['__init__.py', 'test_module.py']}
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self.setup_import_issue_package_tests(vfs)
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import_calls = []
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def _get_module_from_name(name):
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import_calls.append(name)
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raise unittest.SkipTest('skipperoo')
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loader = unittest.TestLoader()
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loader._get_module_from_name = _get_module_from_name
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suite = loader.discover('/foo')
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self.assertIn('/foo', sys.path)
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self.assertEqual(suite.countTestCases(), 1)
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result = unittest.TestResult()
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suite.run(result)
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self.assertEqual(len(result.skipped), 1)
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self.assertEqual(result.testsRun, 1)
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self.assertEqual(import_calls, ['my_package'])
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def test_command_line_handling_parseArgs(self):
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program = TestableTestProgram()
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@ -1,9 +1,26 @@
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import sys
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import types
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import warnings
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import unittest
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# Decorator used in the deprecation tests to reset the warning registry for
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# test isolation and reproducibility.
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def warningregistry(func):
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def wrapper(*args, **kws):
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missing = object()
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saved = getattr(warnings, '__warningregistry__', missing).copy()
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try:
|
||||
return func(*args, **kws)
|
||||
finally:
|
||||
if saved is missing:
|
||||
try:
|
||||
del warnings.__warningregistry__
|
||||
except AttributeError:
|
||||
pass
|
||||
else:
|
||||
warnings.__warningregistry__ = saved
|
||||
|
||||
|
||||
class Test_TestLoader(unittest.TestCase):
|
||||
|
||||
|
|
@ -150,6 +167,7 @@ class Test_TestLoader(unittest.TestCase):
|
|||
|
||||
# Check that loadTestsFromModule honors (or not) a module
|
||||
# with a load_tests function.
|
||||
@warningregistry
|
||||
def test_loadTestsFromModule__load_tests(self):
|
||||
m = types.ModuleType('m')
|
||||
class MyTestCase(unittest.TestCase):
|
||||
|
|
@ -168,10 +186,139 @@ class Test_TestLoader(unittest.TestCase):
|
|||
suite = loader.loadTestsFromModule(m)
|
||||
self.assertIsInstance(suite, unittest.TestSuite)
|
||||
self.assertEqual(load_tests_args, [loader, suite, None])
|
||||
# With Python 3.5, the undocumented and unofficial use_load_tests is
|
||||
# ignored (and deprecated).
|
||||
load_tests_args = []
|
||||
with warnings.catch_warnings(record=False):
|
||||
warnings.simplefilter('never')
|
||||
suite = loader.loadTestsFromModule(m, use_load_tests=False)
|
||||
self.assertEqual(load_tests_args, [loader, suite, None])
|
||||
|
||||
@warningregistry
|
||||
def test_loadTestsFromModule__use_load_tests_deprecated_positional(self):
|
||||
with warnings.catch_warnings(record=True) as w:
|
||||
warnings.simplefilter('always')
|
||||
m = types.ModuleType('m')
|
||||
class MyTestCase(unittest.TestCase):
|
||||
def test(self):
|
||||
pass
|
||||
m.testcase_1 = MyTestCase
|
||||
|
||||
load_tests_args = []
|
||||
def load_tests(loader, tests, pattern):
|
||||
self.assertIsInstance(tests, unittest.TestSuite)
|
||||
load_tests_args.extend((loader, tests, pattern))
|
||||
return tests
|
||||
m.load_tests = load_tests
|
||||
# The method still works.
|
||||
loader = unittest.TestLoader()
|
||||
# use_load_tests=True as a positional argument.
|
||||
suite = loader.loadTestsFromModule(m, False)
|
||||
self.assertIsInstance(suite, unittest.TestSuite)
|
||||
# load_tests was still called because use_load_tests is deprecated
|
||||
# and ignored.
|
||||
self.assertEqual(load_tests_args, [loader, suite, None])
|
||||
# We got a warning.
|
||||
self.assertIs(w[-1].category, DeprecationWarning)
|
||||
self.assertEqual(str(w[-1].message),
|
||||
'use_load_tests is deprecated and ignored')
|
||||
|
||||
@warningregistry
|
||||
def test_loadTestsFromModule__use_load_tests_deprecated_keyword(self):
|
||||
with warnings.catch_warnings(record=True) as w:
|
||||
warnings.simplefilter('always')
|
||||
m = types.ModuleType('m')
|
||||
class MyTestCase(unittest.TestCase):
|
||||
def test(self):
|
||||
pass
|
||||
m.testcase_1 = MyTestCase
|
||||
|
||||
load_tests_args = []
|
||||
def load_tests(loader, tests, pattern):
|
||||
self.assertIsInstance(tests, unittest.TestSuite)
|
||||
load_tests_args.extend((loader, tests, pattern))
|
||||
return tests
|
||||
m.load_tests = load_tests
|
||||
# The method still works.
|
||||
loader = unittest.TestLoader()
|
||||
suite = loader.loadTestsFromModule(m, use_load_tests=False)
|
||||
self.assertIsInstance(suite, unittest.TestSuite)
|
||||
# load_tests was still called because use_load_tests is deprecated
|
||||
# and ignored.
|
||||
self.assertEqual(load_tests_args, [loader, suite, None])
|
||||
# We got a warning.
|
||||
self.assertIs(w[-1].category, DeprecationWarning)
|
||||
self.assertEqual(str(w[-1].message),
|
||||
'use_load_tests is deprecated and ignored')
|
||||
|
||||
def test_loadTestsFromModule__too_many_positional_args(self):
|
||||
m = types.ModuleType('m')
|
||||
class MyTestCase(unittest.TestCase):
|
||||
def test(self):
|
||||
pass
|
||||
m.testcase_1 = MyTestCase
|
||||
|
||||
load_tests_args = []
|
||||
suite = loader.loadTestsFromModule(m, use_load_tests=False)
|
||||
self.assertEqual(load_tests_args, [])
|
||||
def load_tests(loader, tests, pattern):
|
||||
self.assertIsInstance(tests, unittest.TestSuite)
|
||||
load_tests_args.extend((loader, tests, pattern))
|
||||
return tests
|
||||
m.load_tests = load_tests
|
||||
loader = unittest.TestLoader()
|
||||
with self.assertRaises(TypeError) as cm:
|
||||
loader.loadTestsFromModule(m, False, 'testme.*')
|
||||
self.assertEqual(type(cm.exception), TypeError)
|
||||
# The error message names the first bad argument alphabetically,
|
||||
# however use_load_tests (which sorts first) is ignored.
|
||||
self.assertEqual(
|
||||
str(cm.exception),
|
||||
'loadTestsFromModule() takes 1 positional argument but 2 were given')
|
||||
|
||||
@warningregistry
|
||||
def test_loadTestsFromModule__use_load_tests_other_bad_keyword(self):
|
||||
m = types.ModuleType('m')
|
||||
class MyTestCase(unittest.TestCase):
|
||||
def test(self):
|
||||
pass
|
||||
m.testcase_1 = MyTestCase
|
||||
|
||||
load_tests_args = []
|
||||
def load_tests(loader, tests, pattern):
|
||||
self.assertIsInstance(tests, unittest.TestSuite)
|
||||
load_tests_args.extend((loader, tests, pattern))
|
||||
return tests
|
||||
m.load_tests = load_tests
|
||||
loader = unittest.TestLoader()
|
||||
with warnings.catch_warnings():
|
||||
warnings.simplefilter('never')
|
||||
with self.assertRaises(TypeError) as cm:
|
||||
loader.loadTestsFromModule(
|
||||
m, use_load_tests=False, very_bad=True, worse=False)
|
||||
self.assertEqual(type(cm.exception), TypeError)
|
||||
# The error message names the first bad argument alphabetically,
|
||||
# however use_load_tests (which sorts first) is ignored.
|
||||
self.assertEqual(
|
||||
str(cm.exception),
|
||||
"loadTestsFromModule() got an unexpected keyword argument 'very_bad'")
|
||||
|
||||
def test_loadTestsFromModule__pattern(self):
|
||||
m = types.ModuleType('m')
|
||||
class MyTestCase(unittest.TestCase):
|
||||
def test(self):
|
||||
pass
|
||||
m.testcase_1 = MyTestCase
|
||||
|
||||
load_tests_args = []
|
||||
def load_tests(loader, tests, pattern):
|
||||
self.assertIsInstance(tests, unittest.TestSuite)
|
||||
load_tests_args.extend((loader, tests, pattern))
|
||||
return tests
|
||||
m.load_tests = load_tests
|
||||
|
||||
loader = unittest.TestLoader()
|
||||
suite = loader.loadTestsFromModule(m, pattern='testme.*')
|
||||
self.assertIsInstance(suite, unittest.TestSuite)
|
||||
self.assertEqual(load_tests_args, [loader, suite, 'testme.*'])
|
||||
|
||||
def test_loadTestsFromModule__faulty_load_tests(self):
|
||||
m = types.ModuleType('m')
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue