import unittest as real_unittest from django.conf import settings from django.core.exceptions import ImproperlyConfigured from django.db.models import get_app, get_apps from django.test import _doctest as doctest from django.test.utils import setup_test_environment, teardown_test_environment from django.test.testcases import OutputChecker, DocTestRunner from django.utils import unittest from django.utils.importlib import import_module from django.utils.module_loading import module_has_submodule __all__ = ('DjangoTestSuiteRunner') # The module name for tests outside models.py TEST_MODULE = 'tests' doctestOutputChecker = OutputChecker() def get_tests(app_module): parts = app_module.__name__.split('.') prefix, last = parts[:-1], parts[-1] try: test_module = import_module('.'.join(prefix + [TEST_MODULE])) except ImportError: # Couldn't import tests.py. Was it due to a missing file, or # due to an import error in a tests.py that actually exists? # app_module either points to a models.py file, or models/__init__.py # Tests are therefore either in same directory, or one level up if last == 'models': app_root = import_module('.'.join(prefix)) else: app_root = app_module if not module_has_submodule(app_root, TEST_MODULE): test_module = None else: # The module exists, so there must be an import error in the test # module itself. raise return test_module def build_suite(app_module): """ Create a complete Django test suite for the provided application module. """ suite = unittest.TestSuite() # Load unit and doctests in the models.py module. If module has # a suite() method, use it. Otherwise build the test suite ourselves. if hasattr(app_module, 'suite'): suite.addTest(app_module.suite()) else: suite.addTest(unittest.defaultTestLoader.loadTestsFromModule( app_module)) try: suite.addTest(doctest.DocTestSuite(app_module, checker=doctestOutputChecker, runner=DocTestRunner)) except ValueError: # No doc tests in models.py pass # Check to see if a separate 'tests' module exists parallel to the # models module test_module = get_tests(app_module) if test_module: # Load unit and doctests in the tests.py module. If module has # a suite() method, use it. Otherwise build the test suite ourselves. if hasattr(test_module, 'suite'): suite.addTest(test_module.suite()) else: suite.addTest(unittest.defaultTestLoader.loadTestsFromModule( test_module)) try: suite.addTest(doctest.DocTestSuite( test_module, checker=doctestOutputChecker, runner=DocTestRunner)) except ValueError: # No doc tests in tests.py pass return suite def build_test(label): """ Construct a test case with the specified label. Label should be of the form model.TestClass or model.TestClass.test_method. Returns an instantiated test or test suite corresponding to the label provided. """ parts = label.split('.') if len(parts) < 2 or len(parts) > 3: raise ValueError("Test label '%s' should be of the form app.TestCase " "or app.TestCase.test_method" % label) # # First, look for TestCase instances with a name that matches # app_module = get_app(parts[0]) test_module = get_tests(app_module) TestClass = getattr(app_module, parts[1], None) # Couldn't find the test class in models.py; look in tests.py if TestClass is None: if test_module: TestClass = getattr(test_module, parts[1], None) try: if issubclass(TestClass, (unittest.TestCase, real_unittest.TestCase)): if len(parts) == 2: # label is app.TestClass try: return unittest.TestLoader().loadTestsFromTestCase( TestClass) except TypeError: raise ValueError( "Test label '%s' does not refer to a test class" % label) else: # label is app.TestClass.test_method return TestClass(parts[2]) except TypeError: # TestClass isn't a TestClass - it must be a method or normal class pass # # If there isn't a TestCase, look for a doctest that matches # tests = [] for module in app_module, test_module: try: doctests = doctest.DocTestSuite(module, checker=doctestOutputChecker, runner=DocTestRunner) # Now iterate over the suite, looking for doctests whose name # matches the pattern that was given for test in doctests: if test._dt_test.name in ( '%s.%s' % (module.__name__, '.'.join(parts[1:])), '%s.__test__.%s' % ( module.__name__, '.'.join(parts[1:]))): tests.append(test) except ValueError: # No doctests found. pass # If no tests were found, then we were given a bad test label. if not tests: raise ValueError("Test label '%s' does not refer to a test" % label) # Construct a suite out of the tests that matched. return unittest.TestSuite(tests) def partition_suite(suite, classes, bins): """ Partitions a test suite by test type. classes is a sequence of types bins is a sequence of TestSuites, one more than classes Tests of type classes[i] are added to bins[i], tests with no match found in classes are place in bins[-1] """ for test in suite: if isinstance(test, unittest.TestSuite): partition_suite(test, classes, bins) else: for i in range(len(classes)): if isinstance(test, classes[i]): bins[i].addTest(test) break else: bins[-1].addTest(test) def reorder_suite(suite, classes): """ Reorders a test suite by test type. `classes` is a sequence of types All tests of type classes[0] are placed first, then tests of type classes[1], etc. Tests with no match in classes are placed last. """ class_count = len(classes) bins = [unittest.TestSuite() for i in range(class_count+1)] partition_suite(suite, classes, bins) for i in range(class_count): bins[0].addTests(bins[i+1]) return bins[0] def dependency_ordered(test_databases, dependencies): """ Reorder test_databases into an order that honors the dependencies described in TEST_DEPENDENCIES. """ ordered_test_databases = [] resolved_databases = set() # Maps db signature to dependencies of all it's aliases dependencies_map = {} # sanity check - no DB can depend on it's own alias for sig, (_, aliases) in test_databases: all_deps = set() for alias in aliases: all_deps.update(dependencies.get(alias, [])) if not all_deps.isdisjoint(aliases): raise ImproperlyConfigured( "Circular dependency: databases %r depend on each other, " "but are aliases." % aliases) dependencies_map[sig] = all_deps while test_databases: changed = False deferred = [] # Try to find a DB that has all it's dependencies met for signature, (db_name, aliases) in test_databases: if dependencies_map[signature].issubset(resolved_databases): resolved_databases.update(aliases) ordered_test_databases.append((signature, (db_name, aliases))) changed = True else: deferred.append((signature, (db_name, aliases))) if not changed: raise ImproperlyConfigured( "Circular dependency in TEST_DEPENDENCIES") test_databases = deferred return ordered_test_databases class DjangoTestSuiteRunner(object): def __init__(self, verbosity=1, interactive=True, failfast=True, **kwargs): self.verbosity = verbosity self.interactive = interactive self.failfast = failfast def setup_test_environment(self, **kwargs): setup_test_environment() settings.DEBUG = False unittest.installHandler() def build_suite(self, test_labels, extra_tests=None, **kwargs): suite = unittest.TestSuite() if test_labels: for label in test_labels: if '.' in label: suite.addTest(build_test(label)) else: app = get_app(label) suite.addTest(build_suite(app)) else: for app in get_apps(): suite.addTest(build_suite(app)) if extra_tests: for test in extra_tests: suite.addTest(test) return reorder_suite(suite, (unittest.TestCase,)) def setup_databases(self, **kwargs): from django.db import connections, DEFAULT_DB_ALIAS # First pass -- work out which databases actually need to be created, # and which ones are test mirrors or duplicate entries in DATABASES mirrored_aliases = {} test_databases = {} dependencies = {} for alias in connections: connection = connections[alias] if connection.settings_dict['TEST_MIRROR']: # If the database is marked as a test mirror, save # the alias. mirrored_aliases[alias] = ( connection.settings_dict['TEST_MIRROR']) else: # Store a tuple with DB parameters that uniquely identify it. # If we have two aliases with the same values for that tuple, # we only need to create the test database once. item = test_databases.setdefault( connection.creation.test_db_signature(), (connection.settings_dict['NAME'], set()) ) item[1].add(alias) if 'TEST_DEPENDENCIES' in connection.settings_dict: dependencies[alias] = ( connection.settings_dict['TEST_DEPENDENCIES']) else: if alias != DEFAULT_DB_ALIAS: dependencies[alias] = connection.settings_dict.get( 'TEST_DEPENDENCIES', [DEFAULT_DB_ALIAS]) # Second pass -- actually create the databases. old_names = [] mirrors = [] for signature, (db_name, aliases) in dependency_ordered( test_databases.items(), dependencies): test_db_name = None # Actually create the database for the first connection for alias in aliases: connection = connections[alias] old_names.append((connection, db_name, True)) if test_db_name is None: test_db_name = connection.creation.create_test_db( self.verbosity, autoclobber=not self.interactive) else: connection.settings_dict['NAME'] = test_db_name for alias, mirror_alias in mirrored_aliases.items(): mirrors.append((alias, connections[alias].settings_dict['NAME'])) connections[alias].settings_dict['NAME'] = ( connections[mirror_alias].settings_dict['NAME']) return old_names, mirrors def run_suite(self, suite, **kwargs): return unittest.TextTestRunner( verbosity=self.verbosity, failfast=self.failfast).run(suite) def teardown_databases(self, old_config, **kwargs): """ Destroys all the non-mirror databases. """ old_names, mirrors = old_config for connection, old_name, destroy in old_names: if destroy: connection.creation.destroy_test_db(old_name, self.verbosity) def teardown_test_environment(self, **kwargs): unittest.removeHandler() teardown_test_environment() def suite_result(self, suite, result, **kwargs): return len(result.failures) + len(result.errors) def run_tests(self, test_labels, extra_tests=None, **kwargs): """ Run the unit tests for all the test labels in the provided list. Labels must be of the form: - app.TestClass.test_method Run a single specific test method - app.TestClass Run all the test methods in a given class - app Search for doctests and unittests in the named application. When looking for tests, the test runner will look in the models and tests modules for the application. A list of 'extra' tests may also be provided; these tests will be added to the test suite. Returns the number of tests that failed. """ self.setup_test_environment() suite = self.build_suite(test_labels, extra_tests) old_config = self.setup_databases() result = self.run_suite(suite) self.teardown_databases(old_config) self.teardown_test_environment() return self.suite_result(suite, result)