Viewing file:  test_support.py (12.39 KB) -rw-r--r--
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import importlib
import shutil
import stat
import sys
import os
import unittest
import socket
import tempfile
import errno
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)
expected = ['tests may fail, unable to create temp dir: ' + path]
self.assertEqual(warnings, expected)
# 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]
expected = ['tests may fail, unable to change CWD to: ' + bad_dir]
self.assertEqual(warnings, expected)
# 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(messages, ['tests may fail, unable to change CWD to: ' + path])
# 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)
self.assertRaises(AssertionError, support.check_syntax_error, self, "1")
#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)
# 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
# reap_children
# 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()
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