Source code for nose2.loader

# Adapted from unittest2/loader.py from the unittest2 plugins branch.
# This module contains some code copied from unittest2/loader.py and other
# code developed in reference to that module and others within unittest2.
# unittest2 is Copyright (c) 2001-2010 Python Software Foundation; All
# Rights Reserved. See: http://docs.python.org/license.html

import logging
import traceback
import six
import unittest

from nose2 import events


log = logging.getLogger(__name__)
__unittest = True


[docs]class PluggableTestLoader(object): """Test loader that defers all loading to plugins :param session: Test run session. .. attribute :: suiteClass Suite class to use. Default: :class:`unittest.TestSuite`. """ suiteClass = unittest.TestSuite def __init__(self, session): self.session = session
[docs] def loadTestsFromModule(self, module): """Load tests from module. Fires :func:`loadTestsFromModule` hook. """ evt = events.LoadFromModuleEvent(self, module) result = self.session.hooks.loadTestsFromModule(evt) if evt.handled: suite = result or self.suiteClass() else: suite = self.suiteClass(evt.extraTests) filterevt = events.ModuleSuiteEvent(self, module, suite) result = self.session.hooks.moduleLoadedSuite(filterevt) if result: return result or self.suiteClass() return filterevt.suite
[docs] def loadTestsFromNames(self, testNames, module=None): """Load tests from test names. Fires :func:`loadTestsFromNames` hook. """ event = events.LoadFromNamesEvent( self, testNames, module) result = self.session.hooks.loadTestsFromNames(event) log.debug('loadTestsFromNames event %s result %s', event, result) if event.handled: suites = result or [] else: if event.names: suites = [self.loadTestsFromName(name, module) for name in event.names] elif module: suites = self.loadTestsFromModule(module) if event.extraTests: suites.extend(event.extraTests) return self.suiteClass(suites)
[docs] def loadTestsFromName(self, name, module=None): """Load tests from test name. Fires :func:`loadTestsFromName` hook. """ log.debug('loadTestsFromName %s/%s', name, module) event = events.LoadFromNameEvent(self, name, module) result = self.session.hooks.loadTestsFromName(event) if event.handled: suite = result or self.suiteClass() return suite return self.suiteClass(event.extraTests)
[docs] def failedImport(self, name): """Make test case representing a failed import.""" message = 'Failed to import test module: %s' % name if hasattr(traceback, 'format_exc'): # Python 2.3 compatibility # format_exc returns two frames of discover.py as well XXX ? message += '\n%s' % traceback.format_exc() return self._makeFailedTest( 'ModuleImportFailure', name, ImportError(message))
[docs] def failedLoadTests(self, name, exception): """Make test case representing a failed test load.""" return self._makeFailedTest('LoadTestsFailure', name, exception)
[docs] def sortTestMethodsUsing(self, name): """Sort key for test case test methods.""" return name.lower()
[docs] def discover(self, start_dir=None, pattern=None): """Compatibility shim for ``load_tests`` protocol.""" try: oldsd = self.session.startDir self.session.startDir = start_dir return self.loadTestsFromNames([]) finally: self.session.startDir = oldsd
def _makeFailedTest(self, classname, methodname, exception): def testFailure(self): if isinstance(exception, Exception): raise exception else: # exception tuple (type, value, traceback) six.reraise(*exception) attrs = {methodname: testFailure} TestClass = type(classname, (unittest.TestCase,), attrs) return self.suiteClass((TestClass(methodname),)) def __repr__(self): return '<%s>' % self.__class__.__name__