Edit: test_discovery.py
import os import re import sys import unittest import unittest.test class TestDiscovery(unittest.TestCase): # Heavily mocked tests so I can avoid hitting the filesystem def test_get_name_from_path(self): loader = unittest.TestLoader() loader._top_level_dir = '/foo' name = loader._get_name_from_path('/foo/bar/baz.py') self.assertEqual(name, 'bar.baz') if not __debug__: # asserts are off return with self.assertRaises(AssertionError): loader._get_name_from_path('/bar/baz.py') def test_find_tests(self): loader = unittest.TestLoader() original_listdir = os.listdir def restore_listdir(): os.listdir = original_listdir original_isfile = os.path.isfile def restore_isfile(): os.path.isfile = original_isfile original_isdir = os.path.isdir def restore_isdir(): os.path.isdir = original_isdir path_lists = [['test1.py', 'test2.py', 'not_a_test.py', 'test_dir', 'test.foo', 'test-not-a-module.py', 'another_dir'], ['test3.py', 'test4.py', ]] os.listdir = lambda path: path_lists.pop(0) self.addCleanup(restore_listdir) def isdir(path): return path.endswith('dir') os.path.isdir = isdir self.addCleanup(restore_isdir) def isfile(path): # another_dir is not a package and so shouldn't be recursed into return not path.endswith('dir') and not 'another_dir' in path os.path.isfile = isfile self.addCleanup(restore_isfile) loader._get_module_from_name = lambda path: path + ' module' loader.loadTestsFromModule = lambda module: module + ' tests' top_level = os.path.abspath('/foo') loader._top_level_dir = top_level suite = list(loader._find_tests(top_level, 'test*.py')) expected = [name + ' module tests' for name in ('test1', 'test2')] expected.extend([('test_dir.%s' % name) + ' module tests' for name in ('test3', 'test4')]) self.assertEqual(suite, expected) def test_find_tests_with_package(self): loader = unittest.TestLoader() original_listdir = os.listdir def restore_listdir(): os.listdir = original_listdir original_isfile = os.path.isfile def restore_isfile(): os.path.isfile = original_isfile original_isdir = os.path.isdir def restore_isdir(): os.path.isdir = original_isdir directories = ['a_directory', 'test_directory', 'test_directory2'] path_lists = [directories, [], [], []] os.listdir = lambda path: path_lists.pop(0) self.addCleanup(restore_listdir) os.path.isdir = lambda path: True self.addCleanup(restore_isdir) os.path.isfile = lambda path: os.path.basename(path) not in directories self.addCleanup(restore_isfile) class Module(object): paths = [] load_tests_args = [] def __init__(self, path): self.path = path self.paths.append(path) if os.path.basename(path) == 'test_directory': def load_tests(loader, tests, pattern): self.load_tests_args.append((loader, tests, pattern)) return 'load_tests' self.load_tests = load_tests def __eq__(self, other): return self.path == other.path # Silence py3k warning __hash__ = None loader._get_module_from_name = lambda name: Module(name) def loadTestsFromModule(module, use_load_tests): if use_load_tests: raise self.failureException('use_load_tests should be False for packages') return module.path + ' module tests' loader.loadTestsFromModule = loadTestsFromModule loader._top_level_dir = '/foo' # this time no '.py' on the pattern so that it can match # a test package suite = list(loader._find_tests('/foo', 'test*')) # We should have loaded tests from the test_directory package by calling load_tests # and directly from the test_directory2 package self.assertEqual(suite, ['load_tests', 'test_directory2' + ' module tests']) self.assertEqual(Module.paths, ['test_directory', 'test_directory2']) # load_tests should have been called once with loader, tests and pattern self.assertEqual(Module.load_tests_args, [(loader, 'test_directory' + ' module tests', 'test*')]) def test_discover(self): loader = unittest.TestLoader() original_isfile = os.path.isfile original_isdir = os.path.isdir def restore_isfile(): os.path.isfile = original_isfile os.path.isfile = lambda path: False self.addCleanup(restore_isfile) orig_sys_path = sys.path[:] def restore_path(): sys.path[:] = orig_sys_path self.addCleanup(restore_path) full_path = os.path.abspath(os.path.normpath('/foo')) with self.assertRaises(ImportError): loader.discover('/foo/bar', top_level_dir='/foo') self.assertEqual(loader._top_level_dir, full_path) self.assertIn(full_path, sys.path) os.path.isfile = lambda path: True os.path.isdir = lambda path: True def restore_isdir(): os.path.isdir = original_isdir self.addCleanup(restore_isdir) _find_tests_args = [] def _find_tests(start_dir, pattern): _find_tests_args.append((start_dir, pattern)) return ['tests'] loader._find_tests = _find_tests loader.suiteClass = str suite = loader.discover('/foo/bar/baz', 'pattern', '/foo/bar') top_level_dir = os.path.abspath('/foo/bar') start_dir = os.path.abspath('/foo/bar/baz') self.assertEqual(suite, "['tests']") self.assertEqual(loader._top_level_dir, top_level_dir) self.assertEqual(_find_tests_args, [(start_dir, 'pattern')]) self.assertIn(top_level_dir, sys.path) def test_discover_with_modules_that_fail_to_import(self): loader = unittest.TestLoader() listdir = os.listdir os.listdir = lambda _: ['test_this_does_not_exist.py'] isfile = os.path.isfile os.path.isfile = lambda _: True orig_sys_path = sys.path[:] def restore(): os.path.isfile = isfile os.listdir = listdir sys.path[:] = orig_sys_path self.addCleanup(restore) suite = loader.discover('.') self.assertIn(os.getcwd(), sys.path) self.assertEqual(suite.countTestCases(), 1) test = list(list(suite)[0])[0] # extract test from suite with self.assertRaises(ImportError): test.test_this_does_not_exist() def test_command_line_handling_parseArgs(self): # Haha - take that uninstantiable class program = object.__new__(unittest.TestProgram) args = [] def do_discovery(argv): args.extend(argv) program._do_discovery = do_discovery program.parseArgs(['something', 'discover']) self.assertEqual(args, []) program.parseArgs(['something', 'discover', 'foo', 'bar']) self.assertEqual(args, ['foo', 'bar']) def test_command_line_handling_do_discovery_too_many_arguments(self): class Stop(Exception): pass def usageExit(): raise Stop program = object.__new__(unittest.TestProgram) program.usageExit = usageExit program.testLoader = None with self.assertRaises(Stop): # too many args program._do_discovery(['one', 'two', 'three', 'four']) def test_command_line_handling_do_discovery_uses_default_loader(self): program = object.__new__(unittest.TestProgram) class Loader(object): args = [] def discover(self, start_dir, pattern, top_level_dir): self.args.append((start_dir, pattern, top_level_dir)) return 'tests' program.testLoader = Loader() program._do_discovery(['-v']) self.assertEqual(Loader.args, [('.', 'test*.py', None)]) def test_command_line_handling_do_discovery_calls_loader(self): program = object.__new__(unittest.TestProgram) class Loader(object): args = [] def discover(self, start_dir, pattern, top_level_dir): self.args.append((start_dir, pattern, top_level_dir)) return 'tests' program._do_discovery(['-v'], Loader=Loader) self.assertEqual(program.verbosity, 2) self.assertEqual(program.test, 'tests') self.assertEqual(Loader.args, [('.', 'test*.py', None)]) Loader.args = [] program = object.__new__(unittest.TestProgram) program._do_discovery(['--verbose'], Loader=Loader) self.assertEqual(program.test, 'tests') self.assertEqual(Loader.args, [('.', 'test*.py', None)]) Loader.args = [] program = object.__new__(unittest.TestProgram) program._do_discovery([], Loader=Loader) self.assertEqual(program.test, 'tests') self.assertEqual(Loader.args, [('.', 'test*.py', None)]) Loader.args = [] program = object.__new__(unittest.TestProgram) program._do_discovery(['fish'], Loader=Loader) self.assertEqual(program.test, 'tests') self.assertEqual(Loader.args, [('fish', 'test*.py', None)]) Loader.args = [] program = object.__new__(unittest.TestProgram) program._do_discovery(['fish', 'eggs'], Loader=Loader) self.assertEqual(program.test, 'tests') self.assertEqual(Loader.args, [('fish', 'eggs', None)]) Loader.args = [] program = object.__new__(unittest.TestProgram) program._do_discovery(['fish', 'eggs', 'ham'], Loader=Loader) self.assertEqual(program.test, 'tests') self.assertEqual(Loader.args, [('fish', 'eggs', 'ham')]) Loader.args = [] program = object.__new__(unittest.TestProgram) program._do_discovery(['-s', 'fish'], Loader=Loader) self.assertEqual(program.test, 'tests') self.assertEqual(Loader.args, [('fish', 'test*.py', None)]) Loader.args = [] program = object.__new__(unittest.TestProgram) program._do_discovery(['-t', 'fish'], Loader=Loader) self.assertEqual(program.test, 'tests') self.assertEqual(Loader.args, [('.', 'test*.py', 'fish')]) Loader.args = [] program = object.__new__(unittest.TestProgram) program._do_discovery(['-p', 'fish'], Loader=Loader) self.assertEqual(program.test, 'tests') self.assertEqual(Loader.args, [('.', 'fish', None)]) self.assertFalse(program.failfast) self.assertFalse(program.catchbreak) Loader.args = [] program = object.__new__(unittest.TestProgram) program._do_discovery(['-p', 'eggs', '-s', 'fish', '-v', '-f', '-c'], Loader=Loader) self.assertEqual(program.test, 'tests') self.assertEqual(Loader.args, [('fish', 'eggs', None)]) self.assertEqual(program.verbosity, 2) self.assertTrue(program.failfast) self.assertTrue(program.catchbreak) def setup_module_clash(self): class Module(object): __file__ = 'bar/foo.py' sys.modules['foo'] = Module full_path = os.path.abspath('foo') original_listdir = os.listdir original_isfile = os.path.isfile original_isdir = os.path.isdir def cleanup(): os.listdir = original_listdir os.path.isfile = original_isfile os.path.isdir = original_isdir del sys.modules['foo'] if full_path in sys.path: sys.path.remove(full_path) self.addCleanup(cleanup) def listdir(_): return ['foo.py'] def isfile(_): return True def isdir(_): return True os.listdir = listdir os.path.isfile = isfile os.path.isdir = isdir return full_path def test_detect_module_clash(self): full_path = self.setup_module_clash() loader = unittest.TestLoader() mod_dir = os.path.abspath('bar') expected_dir = os.path.abspath('foo') msg = re.escape(r"'foo' module incorrectly imported from %r. Expected %r. " "Is this module globally installed?" % (mod_dir, expected_dir)) self.assertRaisesRegexp( ImportError, '^%s$' % msg, loader.discover, start_dir='foo', pattern='foo.py' ) self.assertEqual(sys.path[0], full_path) def test_module_symlink_ok(self): full_path = self.setup_module_clash() original_realpath = os.path.realpath mod_dir = os.path.abspath('bar') expected_dir = os.path.abspath('foo') def cleanup(): os.path.realpath = original_realpath self.addCleanup(cleanup) def realpath(path): if path == os.path.join(mod_dir, 'foo.py'): return os.path.join(expected_dir, 'foo.py') return path os.path.realpath = realpath loader = unittest.TestLoader() loader.discover(start_dir='foo', pattern='foo.py') def test_discovery_from_dotted_path(self): loader = unittest.TestLoader() tests = [self] expectedPath = os.path.abspath(os.path.dirname(unittest.test.__file__)) self.wasRun = False def _find_tests(start_dir, pattern): self.wasRun = True self.assertEqual(start_dir, expectedPath) return tests loader._find_tests = _find_tests suite = loader.discover('unittest.test') self.assertTrue(self.wasRun) self.assertEqual(suite._tests, tests) if __name__ == '__main__': unittest.main()
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