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