python (3.12.0)
1 from test.test_importlib import abc, util
2
3 machinery = util.import_importlib('importlib.machinery')
4
5 import sys
6 import types
7 import unittest
8 import warnings
9
10 @unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module')
11 class ESC[4;38;5;81mLoaderTests(ESC[4;38;5;149mabcESC[4;38;5;149m.ESC[4;38;5;149mLoaderTests):
12
13 """Test load_module() for built-in modules."""
14
15 def setUp(self):
16 self.verification = {'__name__': 'errno', '__package__': '',
17 '__loader__': self.machinery.BuiltinImporter}
18
19 def verify(self, module):
20 """Verify that the module matches against what it should have."""
21 self.assertIsInstance(module, types.ModuleType)
22 for attr, value in self.verification.items():
23 self.assertEqual(getattr(module, attr), value)
24 self.assertIn(module.__name__, sys.modules)
25
26 def load_module(self, name):
27 with warnings.catch_warnings():
28 warnings.simplefilter("ignore", DeprecationWarning)
29 return self.machinery.BuiltinImporter.load_module(name)
30
31 def test_module(self):
32 # Common case.
33 with util.uncache(util.BUILTINS.good_name):
34 module = self.load_module(util.BUILTINS.good_name)
35 self.verify(module)
36
37 # Built-in modules cannot be a package.
38 test_package = test_lacking_parent = None
39
40 # No way to force an import failure.
41 test_state_after_failure = None
42
43 def test_module_reuse(self):
44 # Test that the same module is used in a reload.
45 with util.uncache(util.BUILTINS.good_name):
46 module1 = self.load_module(util.BUILTINS.good_name)
47 module2 = self.load_module(util.BUILTINS.good_name)
48 self.assertIs(module1, module2)
49
50 def test_unloadable(self):
51 name = 'dssdsdfff'
52 assert name not in sys.builtin_module_names
53 with self.assertRaises(ImportError) as cm:
54 self.load_module(name)
55 self.assertEqual(cm.exception.name, name)
56
57 def test_already_imported(self):
58 # Using the name of a module already imported but not a built-in should
59 # still fail.
60 module_name = 'builtin_reload_test'
61 assert module_name not in sys.builtin_module_names
62 with util.uncache(module_name):
63 module = types.ModuleType(module_name)
64 sys.modules[module_name] = module
65 with self.assertRaises(ImportError) as cm:
66 self.load_module(module_name)
67 self.assertEqual(cm.exception.name, module_name)
68
69
70 (Frozen_LoaderTests,
71 Source_LoaderTests
72 ) = util.test_both(LoaderTests, machinery=machinery)
73
74
75 @unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module')
76 class ESC[4;38;5;81mInspectLoaderTests:
77
78 """Tests for InspectLoader methods for BuiltinImporter."""
79
80 def test_get_code(self):
81 # There is no code object.
82 result = self.machinery.BuiltinImporter.get_code(util.BUILTINS.good_name)
83 self.assertIsNone(result)
84
85 def test_get_source(self):
86 # There is no source.
87 result = self.machinery.BuiltinImporter.get_source(util.BUILTINS.good_name)
88 self.assertIsNone(result)
89
90 def test_is_package(self):
91 # Cannot be a package.
92 result = self.machinery.BuiltinImporter.is_package(util.BUILTINS.good_name)
93 self.assertFalse(result)
94
95 @unittest.skipIf(util.BUILTINS.bad_name is None, 'all modules are built in')
96 def test_not_builtin(self):
97 # Modules not built-in should raise ImportError.
98 for meth_name in ('get_code', 'get_source', 'is_package'):
99 method = getattr(self.machinery.BuiltinImporter, meth_name)
100 with self.assertRaises(ImportError) as cm:
101 method(util.BUILTINS.bad_name)
102
103
104 (Frozen_InspectLoaderTests,
105 Source_InspectLoaderTests
106 ) = util.test_both(InspectLoaderTests, machinery=machinery)
107
108
109 if __name__ == '__main__':
110 unittest.main()
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