Python code coverage for Lib/test/test_importlib/builtin/test_loader.py

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