Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 1 | import os, sys, string, random, tempfile, unittest |
| 2 | |
| 3 | from 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.mktemp() |
| 21 | os.mkdir(self.test_dir) |
| 22 | sys.path.append(self.test_dir) |
| 23 | self.package_dir = os.path.join(self.test_dir, |
| 24 | self.package_name) |
| 25 | os.mkdir(self.package_dir) |
| 26 | open(os.path.join(self.package_dir, '__init__.py'), 'w') |
| 27 | self.module_path = os.path.join(self.package_dir, 'foo.py') |
| 28 | |
| 29 | def tearDown(self): |
| 30 | for file in os.listdir(self.package_dir): |
| 31 | os.remove(os.path.join(self.package_dir, file)) |
| 32 | os.rmdir(self.package_dir) |
| 33 | os.rmdir(self.test_dir) |
| 34 | self.assertNotEqual(sys.path.count(self.test_dir), 0) |
| 35 | sys.path.remove(self.test_dir) |
| 36 | self.remove_modules() |
| 37 | |
| 38 | def rewrite_file(self, contents): |
Tim Peters | d342c62 | 2001-08-02 17:23:11 +0000 | [diff] [blame] | 39 | for extension in "co": |
| 40 | compiled_path = self.module_path + extension |
| 41 | if os.path.exists(compiled_path): |
| 42 | os.remove(compiled_path) |
| 43 | f = open(self.module_path, 'w') |
| 44 | f.write(contents) |
| 45 | f.close() |
Tim Peters | ab9ba27 | 2001-08-09 21:40:30 +0000 | [diff] [blame^] | 46 | |
Guido van Rossum | 394a47b | 2001-08-02 14:14:20 +0000 | [diff] [blame] | 47 | def test_package_import__semantics(self): |
| 48 | |
| 49 | # Generate a couple of broken modules to try importing. |
| 50 | |
| 51 | # ...try loading the module when there's a SyntaxError |
| 52 | self.rewrite_file('for') |
| 53 | try: __import__(self.module_name) |
| 54 | except SyntaxError: pass |
| 55 | else: raise RuntimeError, 'Failed to induce SyntaxError' |
| 56 | self.assert_(not sys.modules.has_key(self.module_name) and |
| 57 | not hasattr(sys.modules[self.package_name], 'foo')) |
| 58 | |
| 59 | # ...make up a variable name that isn't bound in __builtins__ |
| 60 | var = 'a' |
| 61 | while var in dir(__builtins__): |
| 62 | var += random.choose(string.letters) |
| 63 | |
| 64 | # ...make a module that just contains that |
| 65 | self.rewrite_file(var) |
| 66 | |
| 67 | try: __import__(self.module_name) |
| 68 | except NameError: pass |
| 69 | else: raise RuntimeError, 'Failed to induce NameError.' |
| 70 | module = __import__(self.module_name).foo |
| 71 | |
| 72 | # ...now change the module so that the NameError doesn't |
| 73 | # happen |
| 74 | self.rewrite_file('%s = 1' % var) |
| 75 | reload(module) |
| 76 | self.assertEqual(getattr(module, var), 1) |
| 77 | |
| 78 | run_unittest(TestImport) |