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317 lines
10 KiB
Python
317 lines
10 KiB
Python
"""TestSuite"""
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import sys
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from . import case
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from . import util
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__unittest = True
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def _call_if_exists(parent, attr):
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func = getattr(parent, attr, lambda: None)
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func()
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class BaseTestSuite(object):
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"""A simple test suite that doesn't provide class or module shared fixtures.
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"""
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_cleanup = True
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def __init__(self, tests=()):
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self._tests = []
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self.addTests(tests)
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def __repr__(self):
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return "<%s tests=%s>" % (util.strclass(self.__class__), list(self))
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def __eq__(self, other):
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if not isinstance(other, self.__class__):
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return NotImplemented
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return list(self) == list(other)
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def __ne__(self, other):
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return not self == other
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def __iter__(self):
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return iter(self._tests)
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def countTestCases(self):
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cases = 0
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for test in self:
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cases += test.countTestCases()
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return cases
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def addTest(self, test):
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# sanity checks
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if not callable(test):
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raise TypeError("{} is not callable".format(repr(test)))
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if isinstance(test, type) and issubclass(test,
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(case.TestCase, TestSuite)):
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raise TypeError("TestCases and TestSuites must be instantiated "
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"before passing them to addTest()")
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self._tests.append(test)
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def addTests(self, tests):
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if isinstance(tests, str):
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raise TypeError("tests must be an iterable of tests, not a string")
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for test in tests:
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self.addTest(test)
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def run(self, result):
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for index, test in enumerate(self):
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if result.shouldStop:
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break
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test(result)
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if self._cleanup:
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self._removeTestAtIndex(index)
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return result
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def _removeTestAtIndex(self, index):
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"""Stop holding a reference to the TestCase at index."""
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try:
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self._tests[index] = None
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except TypeError:
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# support for suite implementations that have overriden self._test
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pass
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def __call__(self, *args, **kwds):
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return self.run(*args, **kwds)
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def debug(self):
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"""Run the tests without collecting errors in a TestResult"""
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for test in self:
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test.debug()
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class TestSuite(BaseTestSuite):
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"""A test suite is a composite test consisting of a number of TestCases.
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For use, create an instance of TestSuite, then add test case instances.
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When all tests have been added, the suite can be passed to a test
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runner, such as TextTestRunner. It will run the individual test cases
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in the order in which they were added, aggregating the results. When
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subclassing, do not forget to call the base class constructor.
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"""
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def run(self, result, debug=False):
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topLevel = False
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if getattr(result, '_testRunEntered', False) is False:
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result._testRunEntered = topLevel = True
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for index, test in enumerate(self):
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if result.shouldStop:
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break
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if _isnotsuite(test):
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self._tearDownPreviousClass(test, result)
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self._handleModuleFixture(test, result)
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self._handleClassSetUp(test, result)
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result._previousTestClass = test.__class__
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if (getattr(test.__class__, '_classSetupFailed', False) or
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getattr(result, '_moduleSetUpFailed', False)):
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continue
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if not debug:
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test(result)
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else:
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test.debug()
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if self._cleanup:
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self._removeTestAtIndex(index)
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if topLevel:
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self._tearDownPreviousClass(None, result)
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self._handleModuleTearDown(result)
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result._testRunEntered = False
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return result
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def debug(self):
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"""Run the tests without collecting errors in a TestResult"""
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debug = _DebugResult()
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self.run(debug, True)
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################################
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def _handleClassSetUp(self, test, result):
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previousClass = getattr(result, '_previousTestClass', None)
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currentClass = test.__class__
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if currentClass == previousClass:
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return
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if result._moduleSetUpFailed:
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return
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if getattr(currentClass, "__unittest_skip__", False):
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return
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try:
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currentClass._classSetupFailed = False
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except TypeError:
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# test may actually be a function
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# so its class will be a builtin-type
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pass
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setUpClass = getattr(currentClass, 'setUpClass', None)
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if setUpClass is not None:
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_call_if_exists(result, '_setupStdout')
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try:
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setUpClass()
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except Exception as e:
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if isinstance(result, _DebugResult):
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raise
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currentClass._classSetupFailed = True
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className = util.strclass(currentClass)
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errorName = 'setUpClass (%s)' % className
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self._addClassOrModuleLevelException(result, e, errorName)
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finally:
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_call_if_exists(result, '_restoreStdout')
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def _get_previous_module(self, result):
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previousModule = None
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previousClass = getattr(result, '_previousTestClass', None)
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if previousClass is not None:
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previousModule = previousClass.__module__
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return previousModule
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def _handleModuleFixture(self, test, result):
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previousModule = self._get_previous_module(result)
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currentModule = test.__class__.__module__
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if currentModule == previousModule:
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return
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self._handleModuleTearDown(result)
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result._moduleSetUpFailed = False
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try:
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module = sys.modules[currentModule]
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except KeyError:
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return
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setUpModule = getattr(module, 'setUpModule', None)
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if setUpModule is not None:
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_call_if_exists(result, '_setupStdout')
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try:
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setUpModule()
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except Exception as e:
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if isinstance(result, _DebugResult):
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raise
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result._moduleSetUpFailed = True
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errorName = 'setUpModule (%s)' % currentModule
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self._addClassOrModuleLevelException(result, e, errorName)
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finally:
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_call_if_exists(result, '_restoreStdout')
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def _addClassOrModuleLevelException(self, result, exception, errorName):
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error = _ErrorHolder(errorName)
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addSkip = getattr(result, 'addSkip', None)
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if addSkip is not None and isinstance(exception, case.SkipTest):
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addSkip(error, str(exception))
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else:
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result.addError(error, sys.exc_info())
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def _handleModuleTearDown(self, result):
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previousModule = self._get_previous_module(result)
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if previousModule is None:
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return
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if result._moduleSetUpFailed:
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return
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try:
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module = sys.modules[previousModule]
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except KeyError:
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return
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tearDownModule = getattr(module, 'tearDownModule', None)
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if tearDownModule is not None:
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_call_if_exists(result, '_setupStdout')
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try:
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tearDownModule()
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except Exception as e:
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if isinstance(result, _DebugResult):
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raise
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errorName = 'tearDownModule (%s)' % previousModule
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self._addClassOrModuleLevelException(result, e, errorName)
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finally:
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_call_if_exists(result, '_restoreStdout')
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def _tearDownPreviousClass(self, test, result):
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previousClass = getattr(result, '_previousTestClass', None)
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currentClass = test.__class__
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if currentClass == previousClass:
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return
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if getattr(previousClass, '_classSetupFailed', False):
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return
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if getattr(result, '_moduleSetUpFailed', False):
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return
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if getattr(previousClass, "__unittest_skip__", False):
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return
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tearDownClass = getattr(previousClass, 'tearDownClass', None)
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if tearDownClass is not None:
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_call_if_exists(result, '_setupStdout')
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try:
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tearDownClass()
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except Exception as e:
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if isinstance(result, _DebugResult):
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raise
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className = util.strclass(previousClass)
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errorName = 'tearDownClass (%s)' % className
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self._addClassOrModuleLevelException(result, e, errorName)
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finally:
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_call_if_exists(result, '_restoreStdout')
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class _ErrorHolder(object):
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"""
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Placeholder for a TestCase inside a result. As far as a TestResult
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is concerned, this looks exactly like a unit test. Used to insert
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arbitrary errors into a test suite run.
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"""
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# Inspired by the ErrorHolder from Twisted:
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# http://twistedmatrix.com/trac/browser/trunk/twisted/trial/runner.py
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# attribute used by TestResult._exc_info_to_string
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failureException = None
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def __init__(self, description):
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self.description = description
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def id(self):
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return self.description
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def shortDescription(self):
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return None
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def __repr__(self):
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return "<ErrorHolder description=%r>" % (self.description,)
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def __str__(self):
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return self.id()
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def run(self, result):
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# could call result.addError(...) - but this test-like object
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# shouldn't be run anyway
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pass
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def __call__(self, result):
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return self.run(result)
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def countTestCases(self):
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return 0
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def _isnotsuite(test):
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"A crude way to tell apart testcases and suites with duck-typing"
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try:
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iter(test)
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except TypeError:
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return True
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return False
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class _DebugResult(object):
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"Used by the TestSuite to hold previous class when running in debug."
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_previousTestClass = None
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_moduleSetUpFailed = False
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shouldStop = False
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