import contextlib import errno import importlib import io import os import shutil import socket import stat import sys import tempfile import time import unittest from test import support TESTFN = support.TESTFN class TestSupport(unittest.TestCase): def test_import_module(self): support.import_module("ftplib") self.assertRaises(unittest.SkipTest, support.import_module, "foo") def test_import_fresh_module(self): support.import_fresh_module("ftplib") def test_get_attribute(self): self.assertEqual(support.get_attribute(self, "test_get_attribute"), self.test_get_attribute) self.assertRaises(unittest.SkipTest, support.get_attribute, self, "foo") @unittest.skip("failing buildbots") def test_get_original_stdout(self): self.assertEqual(support.get_original_stdout(), sys.stdout) def test_unload(self): import sched self.assertIn("sched", sys.modules) support.unload("sched") self.assertNotIn("sched", sys.modules) def test_unlink(self): with open(TESTFN, "w") as f: pass support.unlink(TESTFN) self.assertFalse(os.path.exists(TESTFN)) support.unlink(TESTFN) def test_rmtree(self): dirpath = support.TESTFN + 'd' subdirpath = os.path.join(dirpath, 'subdir') os.mkdir(dirpath) os.mkdir(subdirpath) support.rmtree(dirpath) self.assertFalse(os.path.exists(dirpath)) with support.swap_attr(support, 'verbose', 0): support.rmtree(dirpath) os.mkdir(dirpath) os.mkdir(subdirpath) os.chmod(dirpath, stat.S_IRUSR|stat.S_IXUSR) with support.swap_attr(support, 'verbose', 0): support.rmtree(dirpath) self.assertFalse(os.path.exists(dirpath)) os.mkdir(dirpath) os.mkdir(subdirpath) os.chmod(dirpath, 0) with support.swap_attr(support, 'verbose', 0): support.rmtree(dirpath) self.assertFalse(os.path.exists(dirpath)) def test_forget(self): mod_filename = TESTFN + '.py' with open(mod_filename, 'w') as f: print('foo = 1', file=f) sys.path.insert(0, os.curdir) importlib.invalidate_caches() try: mod = __import__(TESTFN) self.assertIn(TESTFN, sys.modules) support.forget(TESTFN) self.assertNotIn(TESTFN, sys.modules) finally: del sys.path[0] support.unlink(mod_filename) support.rmtree('__pycache__') def test_HOST(self): s = socket.socket() s.bind((support.HOST, 0)) s.close() def test_find_unused_port(self): port = support.find_unused_port() s = socket.socket() s.bind((support.HOST, port)) s.close() def test_bind_port(self): s = socket.socket() support.bind_port(s) s.listen() s.close() # Tests for temp_dir() def test_temp_dir(self): """Test that temp_dir() creates and destroys its directory.""" parent_dir = tempfile.mkdtemp() parent_dir = os.path.realpath(parent_dir) try: path = os.path.join(parent_dir, 'temp') self.assertFalse(os.path.isdir(path)) with support.temp_dir(path) as temp_path: self.assertEqual(temp_path, path) self.assertTrue(os.path.isdir(path)) self.assertFalse(os.path.isdir(path)) finally: support.rmtree(parent_dir) def test_temp_dir__path_none(self): """Test passing no path.""" with support.temp_dir() as temp_path: self.assertTrue(os.path.isdir(temp_path)) self.assertFalse(os.path.isdir(temp_path)) def test_temp_dir__existing_dir__quiet_default(self): """Test passing a directory that already exists.""" def call_temp_dir(path): with support.temp_dir(path) as temp_path: raise Exception("should not get here") path = tempfile.mkdtemp() path = os.path.realpath(path) try: self.assertTrue(os.path.isdir(path)) self.assertRaises(FileExistsError, call_temp_dir, path) # Make sure temp_dir did not delete the original directory. self.assertTrue(os.path.isdir(path)) finally: shutil.rmtree(path) def test_temp_dir__existing_dir__quiet_true(self): """Test passing a directory that already exists with quiet=True.""" path = tempfile.mkdtemp() path = os.path.realpath(path) try: with support.check_warnings() as recorder: with support.temp_dir(path, quiet=True) as temp_path: self.assertEqual(path, temp_path) warnings = [str(w.message) for w in recorder.warnings] # Make sure temp_dir did not delete the original directory. self.assertTrue(os.path.isdir(path)) finally: shutil.rmtree(path) self.assertEqual(len(warnings), 1, warnings) warn = warnings[0] self.assertTrue(warn.startswith(f'tests may fail, unable to create ' f'temporary directory {path!r}: '), warn) # Tests for change_cwd() def test_change_cwd(self): original_cwd = os.getcwd() with support.temp_dir() as temp_path: with support.change_cwd(temp_path) as new_cwd: self.assertEqual(new_cwd, temp_path) self.assertEqual(os.getcwd(), new_cwd) self.assertEqual(os.getcwd(), original_cwd) def test_change_cwd__non_existent_dir(self): """Test passing a non-existent directory.""" original_cwd = os.getcwd() def call_change_cwd(path): with support.change_cwd(path) as new_cwd: raise Exception("should not get here") with support.temp_dir() as parent_dir: non_existent_dir = os.path.join(parent_dir, 'does_not_exist') self.assertRaises(FileNotFoundError, call_change_cwd, non_existent_dir) self.assertEqual(os.getcwd(), original_cwd) def test_change_cwd__non_existent_dir__quiet_true(self): """Test passing a non-existent directory with quiet=True.""" original_cwd = os.getcwd() with support.temp_dir() as parent_dir: bad_dir = os.path.join(parent_dir, 'does_not_exist') with support.check_warnings() as recorder: with support.change_cwd(bad_dir, quiet=True) as new_cwd: self.assertEqual(new_cwd, original_cwd) self.assertEqual(os.getcwd(), new_cwd) warnings = [str(w.message) for w in recorder.warnings] self.assertEqual(len(warnings), 1, warnings) warn = warnings[0] self.assertTrue(warn.startswith(f'tests may fail, unable to change ' f'the current working directory ' f'to {bad_dir!r}: '), warn) # Tests for change_cwd() def test_change_cwd__chdir_warning(self): """Check the warning message when os.chdir() fails.""" path = TESTFN + '_does_not_exist' with support.check_warnings() as recorder: with support.change_cwd(path=path, quiet=True): pass messages = [str(w.message) for w in recorder.warnings] self.assertEqual(len(messages), 1, messages) msg = messages[0] self.assertTrue(msg.startswith(f'tests may fail, unable to change ' f'the current working directory ' f'to {path!r}: '), msg) # Tests for temp_cwd() def test_temp_cwd(self): here = os.getcwd() with support.temp_cwd(name=TESTFN): self.assertEqual(os.path.basename(os.getcwd()), TESTFN) self.assertFalse(os.path.exists(TESTFN)) self.assertTrue(os.path.basename(os.getcwd()), here) def test_temp_cwd__name_none(self): """Test passing None to temp_cwd().""" original_cwd = os.getcwd() with support.temp_cwd(name=None) as new_cwd: self.assertNotEqual(new_cwd, original_cwd) self.assertTrue(os.path.isdir(new_cwd)) self.assertEqual(os.getcwd(), new_cwd) self.assertEqual(os.getcwd(), original_cwd) def test_sortdict(self): self.assertEqual(support.sortdict({3:3, 2:2, 1:1}), "{1: 1, 2: 2, 3: 3}") def test_make_bad_fd(self): fd = support.make_bad_fd() with self.assertRaises(OSError) as cm: os.write(fd, b"foo") self.assertEqual(cm.exception.errno, errno.EBADF) def test_check_syntax_error(self): support.check_syntax_error(self, "def class", lineno=1, offset=9) with self.assertRaises(AssertionError): support.check_syntax_error(self, "x=1") def test_CleanImport(self): import importlib with support.CleanImport("asyncore"): importlib.import_module("asyncore") def test_DirsOnSysPath(self): with support.DirsOnSysPath('foo', 'bar'): self.assertIn("foo", sys.path) self.assertIn("bar", sys.path) self.assertNotIn("foo", sys.path) self.assertNotIn("bar", sys.path) def test_captured_stdout(self): with support.captured_stdout() as stdout: print("hello") self.assertEqual(stdout.getvalue(), "hello\n") def test_captured_stderr(self): with support.captured_stderr() as stderr: print("hello", file=sys.stderr) self.assertEqual(stderr.getvalue(), "hello\n") def test_captured_stdin(self): with support.captured_stdin() as stdin: stdin.write('hello\n') stdin.seek(0) # call test code that consumes from sys.stdin captured = input() self.assertEqual(captured, "hello") def test_gc_collect(self): support.gc_collect() def test_python_is_optimized(self): self.assertIsInstance(support.python_is_optimized(), bool) def test_swap_attr(self): class Obj: pass obj = Obj() obj.x = 1 with support.swap_attr(obj, "x", 5) as x: self.assertEqual(obj.x, 5) self.assertEqual(x, 1) self.assertEqual(obj.x, 1) with support.swap_attr(obj, "y", 5) as y: self.assertEqual(obj.y, 5) self.assertIsNone(y) self.assertFalse(hasattr(obj, 'y')) with support.swap_attr(obj, "y", 5): del obj.y self.assertFalse(hasattr(obj, 'y')) def test_swap_item(self): D = {"x":1} with support.swap_item(D, "x", 5) as x: self.assertEqual(D["x"], 5) self.assertEqual(x, 1) self.assertEqual(D["x"], 1) with support.swap_item(D, "y", 5) as y: self.assertEqual(D["y"], 5) self.assertIsNone(y) self.assertNotIn("y", D) with support.swap_item(D, "y", 5): del D["y"] self.assertNotIn("y", D) class RefClass: attribute1 = None attribute2 = None _hidden_attribute1 = None __magic_1__ = None class OtherClass: attribute2 = None attribute3 = None __magic_1__ = None __magic_2__ = None def test_detect_api_mismatch(self): missing_items = support.detect_api_mismatch(self.RefClass, self.OtherClass) self.assertEqual({'attribute1'}, missing_items) missing_items = support.detect_api_mismatch(self.OtherClass, self.RefClass) self.assertEqual({'attribute3', '__magic_2__'}, missing_items) def test_detect_api_mismatch__ignore(self): ignore = ['attribute1', 'attribute3', '__magic_2__', 'not_in_either'] missing_items = support.detect_api_mismatch( self.RefClass, self.OtherClass, ignore=ignore) self.assertEqual(set(), missing_items) missing_items = support.detect_api_mismatch( self.OtherClass, self.RefClass, ignore=ignore) self.assertEqual(set(), missing_items) def test_check__all__(self): extra = {'tempdir'} blacklist = {'template'} support.check__all__(self, tempfile, extra=extra, blacklist=blacklist) extra = {'TextTestResult', 'installHandler'} blacklist = {'load_tests', "TestProgram", "BaseTestSuite"} support.check__all__(self, unittest, ("unittest.result", "unittest.case", "unittest.suite", "unittest.loader", "unittest.main", "unittest.runner", "unittest.signals"), extra=extra, blacklist=blacklist) self.assertRaises(AssertionError, support.check__all__, self, unittest) @unittest.skipUnless(hasattr(os, 'waitpid') and hasattr(os, 'WNOHANG'), 'need os.waitpid() and os.WNOHANG') def test_reap_children(self): # Make sure that there is no other pending child process support.reap_children() # Create a child process pid = os.fork() if pid == 0: # child process: do nothing, just exit os._exit(0) t0 = time.monotonic() deadline = time.monotonic() + 60.0 was_altered = support.environment_altered try: support.environment_altered = False stderr = io.StringIO() while True: if time.monotonic() > deadline: self.fail("timeout") with contextlib.redirect_stderr(stderr): support.reap_children() # Use environment_altered to check if reap_children() found # the child process if support.environment_altered: break # loop until the child process completed time.sleep(0.100) msg = "Warning -- reap_children() reaped child process %s" % pid self.assertIn(msg, stderr.getvalue()) self.assertTrue(support.environment_altered) finally: support.environment_altered = was_altered # Just in case, check again that there is no other # pending child process support.reap_children() # XXX -follows a list of untested API # make_legacy_pyc # is_resource_enabled # requires # fcmp # umaks # findfile # check_warnings # EnvironmentVarGuard # TransientResource # transient_internet # run_with_locale # set_memlimit # bigmemtest # precisionbigmemtest # bigaddrspacetest # requires_resource # run_doctest # threading_cleanup # reap_threads # strip_python_stderr # args_from_interpreter_flags # can_symlink # skip_unless_symlink # SuppressCrashReport def test_main(): tests = [TestSupport] support.run_unittest(*tests) if __name__ == '__main__': test_main()