Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 1 | import os |
| 2 | import sys |
| 3 | import shutil |
| 4 | import string |
| 5 | import random |
| 6 | import tempfile |
| 7 | import unittest |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 8 | |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 9 | from imp import cache_from_source |
Victor Stinner | bf81622 | 2011-06-30 23:25:47 +0200 | [diff] [blame] | 10 | from test.support import run_unittest, create_empty_file |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 11 | |
| 12 | class TestImport(unittest.TestCase): |
| 13 | |
| 14 | def __init__(self, *args, **kw): |
| 15 | self.package_name = 'PACKAGE_' |
Guido van Rossum | e2b70bc | 2006-08-18 22:13:04 +0000 | [diff] [blame] | 16 | while self.package_name in sys.modules: |
Martin v. Löwis | 967f1e3 | 2007-08-14 09:23:10 +0000 | [diff] [blame] | 17 | self.package_name += random.choose(string.ascii_letters) |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 18 | self.module_name = self.package_name + '.foo' |
| 19 | unittest.TestCase.__init__(self, *args, **kw) |
| 20 | |
| 21 | def remove_modules(self): |
| 22 | for module_name in (self.package_name, self.module_name): |
Guido van Rossum | e2b70bc | 2006-08-18 22:13:04 +0000 | [diff] [blame] | 23 | if module_name in sys.modules: |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 24 | del sys.modules[module_name] |
| 25 | |
| 26 | def setUp(self): |
Guido van Rossum | 3b0a329 | 2002-08-09 16:38:32 +0000 | [diff] [blame] | 27 | self.test_dir = tempfile.mkdtemp() |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 28 | sys.path.append(self.test_dir) |
| 29 | self.package_dir = os.path.join(self.test_dir, |
| 30 | self.package_name) |
| 31 | os.mkdir(self.package_dir) |
Victor Stinner | bf81622 | 2011-06-30 23:25:47 +0200 | [diff] [blame] | 32 | create_empty_file(os.path.join(self.package_dir, '__init__.py')) |
Skip Montanaro | 7a98be2 | 2007-08-16 14:35:24 +0000 | [diff] [blame] | 33 | self.module_path = os.path.join(self.package_dir, 'foo.py') |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 34 | |
| 35 | def tearDown(self): |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 36 | shutil.rmtree(self.test_dir) |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 37 | self.assertNotEqual(sys.path.count(self.test_dir), 0) |
| 38 | sys.path.remove(self.test_dir) |
| 39 | self.remove_modules() |
| 40 | |
| 41 | def rewrite_file(self, contents): |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 42 | compiled_path = cache_from_source(self.module_path) |
| 43 | if os.path.exists(compiled_path): |
| 44 | os.remove(compiled_path) |
| 45 | with open(self.module_path, 'w') as f: |
| 46 | f.write(contents) |
Tim Peters | ab9ba27 | 2001-08-09 21:40:30 +0000 | [diff] [blame] | 47 | |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 48 | def test_package_import__semantics(self): |
| 49 | |
| 50 | # Generate a couple of broken modules to try importing. |
| 51 | |
| 52 | # ...try loading the module when there's a SyntaxError |
| 53 | self.rewrite_file('for') |
| 54 | try: __import__(self.module_name) |
| 55 | except SyntaxError: pass |
Ezio Melotti | b58e0bd | 2010-01-23 15:40:09 +0000 | [diff] [blame] | 56 | else: raise RuntimeError('Failed to induce SyntaxError') # self.fail()? |
| 57 | self.assertNotIn(self.module_name, sys.modules) |
| 58 | self.assertFalse(hasattr(sys.modules[self.package_name], 'foo')) |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 59 | |
| 60 | # ...make up a variable name that isn't bound in __builtins__ |
| 61 | var = 'a' |
| 62 | while var in dir(__builtins__): |
Martin v. Löwis | 967f1e3 | 2007-08-14 09:23:10 +0000 | [diff] [blame] | 63 | var += random.choose(string.ascii_letters) |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 64 | |
| 65 | # ...make a module that just contains that |
| 66 | self.rewrite_file(var) |
| 67 | |
| 68 | try: __import__(self.module_name) |
| 69 | except NameError: pass |
Collin Winter | 3add4d7 | 2007-08-29 23:37:32 +0000 | [diff] [blame] | 70 | else: raise RuntimeError('Failed to induce NameError.') |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 71 | |
| 72 | # ...now change the module so that the NameError doesn't |
| 73 | # happen |
| 74 | self.rewrite_file('%s = 1' % var) |
Tim Peters | 99d001e | 2004-08-02 03:59:57 +0000 | [diff] [blame] | 75 | module = __import__(self.module_name).foo |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 76 | self.assertEqual(getattr(module, var), 1) |
| 77 | |
Fred Drake | 2e2be37 | 2001-09-20 21:33:42 +0000 | [diff] [blame] | 78 | |
| 79 | def test_main(): |
| 80 | run_unittest(TestImport) |
| 81 | |
| 82 | |
| 83 | if __name__ == "__main__": |
| 84 | test_main() |