Commit | Line | Data |
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920dae64 AT |
1 | import os, sys, string, random, tempfile, unittest |
2 | ||
3 | from test.test_support import run_unittest | |
4 | ||
5 | class TestImport(unittest.TestCase): | |
6 | ||
7 | def __init__(self, *args, **kw): | |
8 | self.package_name = 'PACKAGE_' | |
9 | while sys.modules.has_key(self.package_name): | |
10 | self.package_name += random.choose(string.letters) | |
11 | self.module_name = self.package_name + '.foo' | |
12 | unittest.TestCase.__init__(self, *args, **kw) | |
13 | ||
14 | def remove_modules(self): | |
15 | for module_name in (self.package_name, self.module_name): | |
16 | if sys.modules.has_key(module_name): | |
17 | del sys.modules[module_name] | |
18 | ||
19 | def setUp(self): | |
20 | self.test_dir = tempfile.mkdtemp() | |
21 | sys.path.append(self.test_dir) | |
22 | self.package_dir = os.path.join(self.test_dir, | |
23 | self.package_name) | |
24 | os.mkdir(self.package_dir) | |
25 | open(os.path.join(self.package_dir, '__init__'+os.extsep+'py'), 'w') | |
26 | self.module_path = os.path.join(self.package_dir, 'foo'+os.extsep+'py') | |
27 | ||
28 | def tearDown(self): | |
29 | for file in os.listdir(self.package_dir): | |
30 | os.remove(os.path.join(self.package_dir, file)) | |
31 | os.rmdir(self.package_dir) | |
32 | os.rmdir(self.test_dir) | |
33 | self.assertNotEqual(sys.path.count(self.test_dir), 0) | |
34 | sys.path.remove(self.test_dir) | |
35 | self.remove_modules() | |
36 | ||
37 | def rewrite_file(self, contents): | |
38 | for extension in "co": | |
39 | compiled_path = self.module_path + extension | |
40 | if os.path.exists(compiled_path): | |
41 | os.remove(compiled_path) | |
42 | f = open(self.module_path, 'w') | |
43 | f.write(contents) | |
44 | f.close() | |
45 | ||
46 | def test_package_import__semantics(self): | |
47 | ||
48 | # Generate a couple of broken modules to try importing. | |
49 | ||
50 | # ...try loading the module when there's a SyntaxError | |
51 | self.rewrite_file('for') | |
52 | try: __import__(self.module_name) | |
53 | except SyntaxError: pass | |
54 | else: raise RuntimeError, 'Failed to induce SyntaxError' | |
55 | self.assert_(not sys.modules.has_key(self.module_name) and | |
56 | not hasattr(sys.modules[self.package_name], 'foo')) | |
57 | ||
58 | # ...make up a variable name that isn't bound in __builtins__ | |
59 | var = 'a' | |
60 | while var in dir(__builtins__): | |
61 | var += random.choose(string.letters) | |
62 | ||
63 | # ...make a module that just contains that | |
64 | self.rewrite_file(var) | |
65 | ||
66 | try: __import__(self.module_name) | |
67 | except NameError: pass | |
68 | else: raise RuntimeError, 'Failed to induce NameError.' | |
69 | ||
70 | # ...now change the module so that the NameError doesn't | |
71 | # happen | |
72 | self.rewrite_file('%s = 1' % var) | |
73 | module = __import__(self.module_name).foo | |
74 | self.assertEqual(getattr(module, var), 1) | |
75 | ||
76 | ||
77 | def test_main(): | |
78 | run_unittest(TestImport) | |
79 | ||
80 | ||
81 | if __name__ == "__main__": | |
82 | test_main() |