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import imp
import unittest
from test import test_support
class LockTests(unittest.TestCase):
"""Very basic test of import lock functions."""
def verify_lock_state(self, expected):
self.assertEqual(imp.lock_held(), expected,
"expected imp.lock_held() to be %r" % expected)
def testLock(self):
LOOPS = 50
# The import lock may already be held, e.g. if the test suite is run
# via "import test.autotest".
lock_held_at_start = imp.lock_held()
self.verify_lock_state(lock_held_at_start)
for i in range(LOOPS):
imp.acquire_lock()
self.verify_lock_state(True)
for i in range(LOOPS):
imp.release_lock()
# The original state should be restored now.
self.verify_lock_state(lock_held_at_start)
if not lock_held_at_start:
try:
imp.release_lock()
except RuntimeError:
pass
else:
self.fail("release_lock() without lock should raise "
"RuntimeError")
class ReloadTests(unittest.TestCase):
"""Very basic tests to make sure that imp.reload() operates just like
reload()."""
def test_source(self):
# XXX (ncoghlan): It would be nice to use test_support.CleanImport
# here, but that breaks because the os module registers some
# handlers in copy_reg on import. Since CleanImport doesn't
# revert that registration, the module is left in a broken
# state after reversion. Reinitialising the module contents
# and just reverting os.environ to its previous state is an OK
# workaround
with test_support.EnvironmentVarGuard():
import os
imp.reload(os)
def test_extension(self):
with test_support.CleanImport('time'):
import time
imp.reload(time)
def test_builtin(self):
with test_support.CleanImport('marshal'):
import marshal
imp.reload(marshal)
def test_main():
tests = [
ReloadTests,
]
try:
import thread
except ImportError:
pass
else:
tests.append(LockTests)
test_support.run_unittest(*tests)
if __name__ == "__main__":
test_main()
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