import os, sys, string, random, tempfile, unittest | |
from test.test_support import run_unittest | |
class TestImport(unittest.TestCase): | |
def __init__(self, *args, **kw): | |
self.package_name = 'PACKAGE_' | |
while self.package_name in sys.modules: | |
self.package_name += random.choose(string.letters) | |
self.module_name = self.package_name + '.foo' | |
unittest.TestCase.__init__(self, *args, **kw) | |
def remove_modules(self): | |
for module_name in (self.package_name, self.module_name): | |
if module_name in sys.modules: | |
del sys.modules[module_name] | |
def setUp(self): | |
self.test_dir = tempfile.mkdtemp() | |
sys.path.append(self.test_dir) | |
self.package_dir = os.path.join(self.test_dir, | |
self.package_name) | |
os.mkdir(self.package_dir) | |
open(os.path.join( | |
self.package_dir, '__init__'+os.extsep+'py'), 'w').close() | |
self.module_path = os.path.join(self.package_dir, 'foo'+os.extsep+'py') | |
def tearDown(self): | |
for file in os.listdir(self.package_dir): | |
os.remove(os.path.join(self.package_dir, file)) | |
os.rmdir(self.package_dir) | |
os.rmdir(self.test_dir) | |
self.assertNotEqual(sys.path.count(self.test_dir), 0) | |
sys.path.remove(self.test_dir) | |
self.remove_modules() | |
def rewrite_file(self, contents): | |
for extension in "co": | |
compiled_path = self.module_path + extension | |
if os.path.exists(compiled_path): | |
os.remove(compiled_path) | |
f = open(self.module_path, 'w') | |
f.write(contents) | |
f.close() | |
def test_package_import__semantics(self): | |
# Generate a couple of broken modules to try importing. | |
# ...try loading the module when there's a SyntaxError | |
self.rewrite_file('for') | |
try: __import__(self.module_name) | |
except SyntaxError: pass | |
else: raise RuntimeError, 'Failed to induce SyntaxError' | |
self.assertNotIn(self.module_name, sys.modules) | |
self.assertFalse(hasattr(sys.modules[self.package_name], 'foo')) | |
# ...make up a variable name that isn't bound in __builtins__ | |
var = 'a' | |
while var in dir(__builtins__): | |
var += random.choose(string.letters) | |
# ...make a module that just contains that | |
self.rewrite_file(var) | |
try: __import__(self.module_name) | |
except NameError: pass | |
else: raise RuntimeError, 'Failed to induce NameError.' | |
# ...now change the module so that the NameError doesn't | |
# happen | |
self.rewrite_file('%s = 1' % var) | |
module = __import__(self.module_name).foo | |
self.assertEqual(getattr(module, var), 1) | |
def test_main(): | |
run_unittest(TestImport) | |
if __name__ == "__main__": | |
test_main() |