| 1 | n/a | from importlib import _bootstrap |
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| 2 | n/a | from importlib import machinery |
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| 3 | n/a | from .. import util |
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| 4 | n/a | from . import util as import_util |
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| 5 | n/a | import imp |
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| 6 | n/a | import os |
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| 7 | n/a | import sys |
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| 8 | n/a | import tempfile |
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| 9 | n/a | from test import support |
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| 10 | n/a | from types import MethodType |
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| 11 | n/a | import unittest |
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| 12 | n/a | import warnings |
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| 13 | n/a | |
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| 14 | n/a | |
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| 15 | n/a | class FinderTests(unittest.TestCase): |
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| 16 | n/a | |
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| 17 | n/a | """Tests for PathFinder.""" |
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| 18 | n/a | |
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| 19 | n/a | def test_failure(self): |
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| 20 | n/a | # Test None returned upon not finding a suitable finder. |
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| 21 | n/a | module = '<test module>' |
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| 22 | n/a | with util.import_state(): |
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| 23 | n/a | self.assertIsNone(machinery.PathFinder.find_module(module)) |
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| 24 | n/a | |
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| 25 | n/a | def test_sys_path(self): |
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| 26 | n/a | # Test that sys.path is used when 'path' is None. |
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| 27 | n/a | # Implicitly tests that sys.path_importer_cache is used. |
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| 28 | n/a | module = '<test module>' |
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| 29 | n/a | path = '<test path>' |
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| 30 | n/a | importer = util.mock_modules(module) |
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| 31 | n/a | with util.import_state(path_importer_cache={path: importer}, |
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| 32 | n/a | path=[path]): |
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| 33 | n/a | loader = machinery.PathFinder.find_module(module) |
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| 34 | n/a | self.assertIs(loader, importer) |
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| 35 | n/a | |
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| 36 | n/a | def test_path(self): |
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| 37 | n/a | # Test that 'path' is used when set. |
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| 38 | n/a | # Implicitly tests that sys.path_importer_cache is used. |
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| 39 | n/a | module = '<test module>' |
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| 40 | n/a | path = '<test path>' |
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| 41 | n/a | importer = util.mock_modules(module) |
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| 42 | n/a | with util.import_state(path_importer_cache={path: importer}): |
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| 43 | n/a | loader = machinery.PathFinder.find_module(module, [path]) |
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| 44 | n/a | self.assertIs(loader, importer) |
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| 45 | n/a | |
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| 46 | n/a | def test_empty_list(self): |
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| 47 | n/a | # An empty list should not count as asking for sys.path. |
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| 48 | n/a | module = 'module' |
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| 49 | n/a | path = '<test path>' |
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| 50 | n/a | importer = util.mock_modules(module) |
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| 51 | n/a | with util.import_state(path_importer_cache={path: importer}, |
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| 52 | n/a | path=[path]): |
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| 53 | n/a | self.assertIsNone(machinery.PathFinder.find_module('module', [])) |
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| 54 | n/a | |
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| 55 | n/a | def test_path_hooks(self): |
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| 56 | n/a | # Test that sys.path_hooks is used. |
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| 57 | n/a | # Test that sys.path_importer_cache is set. |
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| 58 | n/a | module = '<test module>' |
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| 59 | n/a | path = '<test path>' |
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| 60 | n/a | importer = util.mock_modules(module) |
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| 61 | n/a | hook = import_util.mock_path_hook(path, importer=importer) |
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| 62 | n/a | with util.import_state(path_hooks=[hook]): |
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| 63 | n/a | loader = machinery.PathFinder.find_module(module, [path]) |
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| 64 | n/a | self.assertIs(loader, importer) |
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| 65 | n/a | self.assertIn(path, sys.path_importer_cache) |
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| 66 | n/a | self.assertIs(sys.path_importer_cache[path], importer) |
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| 67 | n/a | |
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| 68 | n/a | def test_empty_path_hooks(self): |
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| 69 | n/a | # Test that if sys.path_hooks is empty a warning is raised, |
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| 70 | n/a | # sys.path_importer_cache gets None set, and PathFinder returns None. |
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| 71 | n/a | path_entry = 'bogus_path' |
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| 72 | n/a | with util.import_state(path_importer_cache={}, path_hooks=[], |
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| 73 | n/a | path=[path_entry]): |
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| 74 | n/a | with warnings.catch_warnings(record=True) as w: |
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| 75 | n/a | warnings.simplefilter('always') |
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| 76 | n/a | self.assertIsNone(machinery.PathFinder.find_module('os')) |
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| 77 | n/a | self.assertIsNone(sys.path_importer_cache[path_entry]) |
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| 78 | n/a | self.assertEqual(len(w), 1) |
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| 79 | n/a | self.assertTrue(issubclass(w[-1].category, ImportWarning)) |
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| 80 | n/a | |
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| 81 | n/a | def test_path_importer_cache_empty_string(self): |
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| 82 | n/a | # The empty string should create a finder using the cwd. |
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| 83 | n/a | path = '' |
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| 84 | n/a | module = '<test module>' |
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| 85 | n/a | importer = util.mock_modules(module) |
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| 86 | n/a | hook = import_util.mock_path_hook(os.curdir, importer=importer) |
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| 87 | n/a | with util.import_state(path=[path], path_hooks=[hook]): |
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| 88 | n/a | loader = machinery.PathFinder.find_module(module) |
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| 89 | n/a | self.assertIs(loader, importer) |
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| 90 | n/a | self.assertIn(os.curdir, sys.path_importer_cache) |
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| 91 | n/a | |
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| 92 | n/a | |
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| 93 | n/a | def test_main(): |
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| 94 | n/a | from test.support import run_unittest |
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| 95 | n/a | run_unittest(FinderTests) |
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| 96 | n/a | |
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| 97 | n/a | if __name__ == '__main__': |
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| 98 | n/a | test_main() |
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