import os
import re
import sys
import unittest
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 test_detect_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
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_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()