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//opt/alt/python27/lib/python2.7/site-packages/nose/proxy.py
""" Result Proxy ------------ The result proxy wraps the result instance given to each test. It performs two functions: enabling extended error/failure reporting and calling plugins. As each result event is fired, plugins are called with the same event; however, plugins are called with the nose.case.Test instance that wraps the actual test. So when a test fails and calls result.addFailure(self, err), the result proxy calls addFailure(self.test, err) for each plugin. This allows plugins to have a single stable interface for all test types, and also to manipulate the test object itself by setting the `test` attribute of the nose.case.Test that they receive. """ import logging from nose.config import Config log = logging.getLogger(__name__) def proxied_attribute(local_attr, proxied_attr, doc): """Create a property that proxies attribute ``proxied_attr`` through the local attribute ``local_attr``. """ def fget(self): return getattr(getattr(self, local_attr), proxied_attr) def fset(self, value): setattr(getattr(self, local_attr), proxied_attr, value) def fdel(self): delattr(getattr(self, local_attr), proxied_attr) return property(fget, fset, fdel, doc) class ResultProxyFactory(object): """Factory for result proxies. Generates a ResultProxy bound to each test and the result passed to the test. """ def __init__(self, config=None): if config is None: config = Config() self.config = config self.__prepared = False self.__result = None def __call__(self, result, test): """Return a ResultProxy for the current test. On first call, plugins are given a chance to replace the result used for the remaining tests. If a plugin returns a value from prepareTestResult, that object will be used as the result for all tests. """ if not self.__prepared: self.__prepared = True plug_result = self.config.plugins.prepareTestResult(result) if plug_result is not None: self.__result = result = plug_result if self.__result is not None: result = self.__result return ResultProxy(result, test, config=self.config) class ResultProxy(object): """Proxy to TestResults (or other results handler). One ResultProxy is created for each nose.case.Test. The result proxy calls plugins with the nose.case.Test instance (instead of the wrapped test case) as each result call is made. Finally, the real result method is called, also with the nose.case.Test instance as the test parameter. """ def __init__(self, result, test, config=None): if config is None: config = Config() self.config = config self.plugins = config.plugins self.result = result self.test = test def __repr__(self): return repr(self.result) def _prepareErr(self, err): if not isinstance(err[1], Exception) and isinstance(err[0], type): # Turn value back into an Exception (required in Python 3.x). # Plugins do all sorts of crazy things with exception values. # Convert it to a custom subclass of Exception with the same # name as the actual exception to make it print correctly. value = type(err[0].__name__, (Exception,), {})(err[1]) err = (err[0], value, err[2]) return err def assertMyTest(self, test): # The test I was called with must be my .test or my # .test's .test. or my .test.test's .case case = getattr(self.test, 'test', None) assert (test is self.test or test is case or test is getattr(case, '_nose_case', None)), ( "ResultProxy for %r (%s) was called with test %r (%s)" % (self.test, id(self.test), test, id(test))) def afterTest(self, test): self.assertMyTest(test) self.plugins.afterTest(self.test) if hasattr(self.result, "afterTest"): self.result.afterTest(self.test) def beforeTest(self, test): self.assertMyTest(test) self.plugins.beforeTest(self.test) if hasattr(self.result, "beforeTest"): self.result.beforeTest(self.test) def addError(self, test, err): self.assertMyTest(test) plugins = self.plugins plugin_handled = plugins.handleError(self.test, err) if plugin_handled: return # test.passed is set in result, to account for error classes formatted = plugins.formatError(self.test, err) if formatted is not None: err = formatted plugins.addError(self.test, err) self.result.addError(self.test, self._prepareErr(err)) if not self.result.wasSuccessful() and self.config.stopOnError: self.shouldStop = True def addFailure(self, test, err): self.assertMyTest(test) plugins = self.plugins plugin_handled = plugins.handleFailure(self.test, err) if plugin_handled: return self.test.passed = False formatted = plugins.formatFailure(self.test, err) if formatted is not None: err = formatted plugins.addFailure(self.test, err) self.result.addFailure(self.test, self._prepareErr(err)) if self.config.stopOnError: self.shouldStop = True def addSkip(self, test, reason): # 2.7 compat shim from nose.plugins.skip import SkipTest self.assertMyTest(test) plugins = self.plugins if not isinstance(reason, Exception): # for Python 3.2+ reason = Exception(reason) plugins.addError(self.test, (SkipTest, reason, None)) self.result.addSkip(self.test, reason) def addSuccess(self, test): self.assertMyTest(test) self.plugins.addSuccess(self.test) self.result.addSuccess(self.test) def startTest(self, test): self.assertMyTest(test) self.plugins.startTest(self.test) self.result.startTest(self.test) def stop(self): self.result.stop() def stopTest(self, test): self.assertMyTest(test) self.plugins.stopTest(self.test) self.result.stopTest(self.test) # proxied attributes shouldStop = proxied_attribute('result', 'shouldStop', """Should the test run stop?""") errors = proxied_attribute('result', 'errors', """Tests that raised an exception""") failures = proxied_attribute('result', 'failures', """Tests that failed""") testsRun = proxied_attribute('result', 'testsRun', """Number of tests run""")
