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1from .. import abc
2from .. import util
3
4machinery = util.import_importlib('importlib.machinery')
5
6import os.path
7import sys
8import types
9import unittest
10import importlib.util
11import importlib
12from test.support.script_helper import assert_python_failure
13
14class LoaderTests(abc.LoaderTests):
15
16    """Test load_module() for extension modules."""
17
18    def setUp(self):
19        self.loader = self.machinery.ExtensionFileLoader(util.EXTENSIONS.name,
20                                                         util.EXTENSIONS.file_path)
21
22    def load_module(self, fullname):
23        return self.loader.load_module(fullname)
24
25    def test_load_module_API(self):
26        # Test the default argument for load_module().
27        self.loader.load_module()
28        self.loader.load_module(None)
29        with self.assertRaises(ImportError):
30            self.load_module('XXX')
31
32    def test_equality(self):
33        other = self.machinery.ExtensionFileLoader(util.EXTENSIONS.name,
34                                                   util.EXTENSIONS.file_path)
35        self.assertEqual(self.loader, other)
36
37    def test_inequality(self):
38        other = self.machinery.ExtensionFileLoader('_' + util.EXTENSIONS.name,
39                                                   util.EXTENSIONS.file_path)
40        self.assertNotEqual(self.loader, other)
41
42    def test_module(self):
43        with util.uncache(util.EXTENSIONS.name):
44            module = self.load_module(util.EXTENSIONS.name)
45            for attr, value in [('__name__', util.EXTENSIONS.name),
46                                ('__file__', util.EXTENSIONS.file_path),
47                                ('__package__', '')]:
48                self.assertEqual(getattr(module, attr), value)
49            self.assertIn(util.EXTENSIONS.name, sys.modules)
50            self.assertIsInstance(module.__loader__,
51                                  self.machinery.ExtensionFileLoader)
52
53    # No extension module as __init__ available for testing.
54    test_package = None
55
56    # No extension module in a package available for testing.
57    test_lacking_parent = None
58
59    def test_module_reuse(self):
60        with util.uncache(util.EXTENSIONS.name):
61            module1 = self.load_module(util.EXTENSIONS.name)
62            module2 = self.load_module(util.EXTENSIONS.name)
63            self.assertIs(module1, module2)
64
65    # No easy way to trigger a failure after a successful import.
66    test_state_after_failure = None
67
68    def test_unloadable(self):
69        name = 'asdfjkl;'
70        with self.assertRaises(ImportError) as cm:
71            self.load_module(name)
72        self.assertEqual(cm.exception.name, name)
73
74    def test_is_package(self):
75        self.assertFalse(self.loader.is_package(util.EXTENSIONS.name))
76        for suffix in self.machinery.EXTENSION_SUFFIXES:
77            path = os.path.join('some', 'path', 'pkg', '__init__' + suffix)
78            loader = self.machinery.ExtensionFileLoader('pkg', path)
79            self.assertTrue(loader.is_package('pkg'))
80
81(Frozen_LoaderTests,
82 Source_LoaderTests
83 ) = util.test_both(LoaderTests, machinery=machinery)
84
85class MultiPhaseExtensionModuleTests(abc.LoaderTests):
86    """Test loading extension modules with multi-phase initialization (PEP 489)
87    """
88
89    def setUp(self):
90        self.name = '_testmultiphase'
91        finder = self.machinery.FileFinder(None)
92        self.spec = importlib.util.find_spec(self.name)
93        assert self.spec
94        self.loader = self.machinery.ExtensionFileLoader(
95            self.name, self.spec.origin)
96
97    # No extension module as __init__ available for testing.
98    test_package = None
99
100    # No extension module in a package available for testing.
101    test_lacking_parent = None
102
103    # Handling failure on reload is the up to the module.
104    test_state_after_failure = None
105
106    def test_module(self):
107        '''Test loading an extension module'''
108        with util.uncache(self.name):
109            module = self.load_module()
110            for attr, value in [('__name__', self.name),
111                                ('__file__', self.spec.origin),
112                                ('__package__', '')]:
113                self.assertEqual(getattr(module, attr), value)
114            with self.assertRaises(AttributeError):
115                module.__path__
116            self.assertIs(module, sys.modules[self.name])
117            self.assertIsInstance(module.__loader__,
118                                  self.machinery.ExtensionFileLoader)
119
120    def test_functionality(self):
121        '''Test basic functionality of stuff defined in an extension module'''
122        with util.uncache(self.name):
123            module = self.load_module()
124            self.assertIsInstance(module, types.ModuleType)
125            ex = module.Example()
126            self.assertEqual(ex.demo('abcd'), 'abcd')
127            self.assertEqual(ex.demo(), None)
128            with self.assertRaises(AttributeError):
129                ex.abc
130            ex.abc = 0
131            self.assertEqual(ex.abc, 0)
132            self.assertEqual(module.foo(9, 9), 18)
133            self.assertIsInstance(module.Str(), str)
134            self.assertEqual(module.Str(1) + '23', '123')
135            with self.assertRaises(module.error):
136                raise module.error()
137            self.assertEqual(module.int_const, 1969)
138            self.assertEqual(module.str_const, 'something different')
139
140    def test_reload(self):
141        '''Test that reload didn't re-set the module's attributes'''
142        with util.uncache(self.name):
143            module = self.load_module()
144            ex_class = module.Example
145            importlib.reload(module)
146            self.assertIs(ex_class, module.Example)
147
148    def test_try_registration(self):
149        '''Assert that the PyState_{Find,Add,Remove}Module C API doesn't work'''
150        module = self.load_module()
151        with self.subTest('PyState_FindModule'):
152            self.assertEqual(module.call_state_registration_func(0), None)
153        with self.subTest('PyState_AddModule'):
154            with self.assertRaises(SystemError):
155                module.call_state_registration_func(1)
156        with self.subTest('PyState_RemoveModule'):
157            with self.assertRaises(SystemError):
158                module.call_state_registration_func(2)
159
160    def load_module(self):
161        '''Load the module from the test extension'''
162        return self.loader.load_module(self.name)
163
164    def load_module_by_name(self, fullname):
165        '''Load a module from the test extension by name'''
166        origin = self.spec.origin
167        loader = self.machinery.ExtensionFileLoader(fullname, origin)
168        spec = importlib.util.spec_from_loader(fullname, loader)
169        module = importlib.util.module_from_spec(spec)
170        loader.exec_module(module)
171        return module
172
173    def test_load_submodule(self):
174        '''Test loading a simulated submodule'''
175        module = self.load_module_by_name('pkg.' + self.name)
176        self.assertIsInstance(module, types.ModuleType)
177        self.assertEqual(module.__name__, 'pkg.' + self.name)
178        self.assertEqual(module.str_const, 'something different')
179
180    def test_load_short_name(self):
181        '''Test loading module with a one-character name'''
182        module = self.load_module_by_name('x')
183        self.assertIsInstance(module, types.ModuleType)
184        self.assertEqual(module.__name__, 'x')
185        self.assertEqual(module.str_const, 'something different')
186        self.assertNotIn('x', sys.modules)
187
188    def test_load_twice(self):
189        '''Test that 2 loads result in 2 module objects'''
190        module1 = self.load_module_by_name(self.name)
191        module2 = self.load_module_by_name(self.name)
192        self.assertIsNot(module1, module2)
193
194    def test_unloadable(self):
195        '''Test nonexistent module'''
196        name = 'asdfjkl;'
197        with self.assertRaises(ImportError) as cm:
198            self.load_module_by_name(name)
199        self.assertEqual(cm.exception.name, name)
200
201    def test_unloadable_nonascii(self):
202        '''Test behavior with nonexistent module with non-ASCII name'''
203        name = 'fo\xf3'
204        with self.assertRaises(ImportError) as cm:
205            self.load_module_by_name(name)
206        self.assertEqual(cm.exception.name, name)
207
208    def test_nonmodule(self):
209        '''Test returning a non-module object from create works'''
210        name = self.name + '_nonmodule'
211        mod = self.load_module_by_name(name)
212        self.assertNotEqual(type(mod), type(unittest))
213        self.assertEqual(mod.three, 3)
214
215    # issue 27782
216    def test_nonmodule_with_methods(self):
217        '''Test creating a non-module object with methods defined'''
218        name = self.name + '_nonmodule_with_methods'
219        mod = self.load_module_by_name(name)
220        self.assertNotEqual(type(mod), type(unittest))
221        self.assertEqual(mod.three, 3)
222        self.assertEqual(mod.bar(10, 1), 9)
223
224    def test_null_slots(self):
225        '''Test that NULL slots aren't a problem'''
226        name = self.name + '_null_slots'
227        module = self.load_module_by_name(name)
228        self.assertIsInstance(module, types.ModuleType)
229        self.assertEqual(module.__name__, name)
230
231    def test_bad_modules(self):
232        '''Test SystemError is raised for misbehaving extensions'''
233        for name_base in [
234                'bad_slot_large',
235                'bad_slot_negative',
236                'create_int_with_state',
237                'negative_size',
238                'export_null',
239                'export_uninitialized',
240                'export_raise',
241                'export_unreported_exception',
242                'create_null',
243                'create_raise',
244                'create_unreported_exception',
245                'nonmodule_with_exec_slots',
246                'exec_err',
247                'exec_raise',
248                'exec_unreported_exception',
249                ]:
250            with self.subTest(name_base):
251                name = self.name + '_' + name_base
252                with self.assertRaises(SystemError):
253                    self.load_module_by_name(name)
254
255    def test_nonascii(self):
256        '''Test that modules with non-ASCII names can be loaded'''
257        # punycode behaves slightly differently in some-ASCII and no-ASCII
258        # cases, so test both
259        cases = [
260            (self.name + '_zkou\u0161ka_na\u010dten\xed', 'Czech'),
261            ('\uff3f\u30a4\u30f3\u30dd\u30fc\u30c8\u30c6\u30b9\u30c8',
262             'Japanese'),
263            ]
264        for name, lang in cases:
265            with self.subTest(name):
266                module = self.load_module_by_name(name)
267                self.assertEqual(module.__name__, name)
268                self.assertEqual(module.__doc__, "Module named in %s" % lang)
269
270
271(Frozen_MultiPhaseExtensionModuleTests,
272 Source_MultiPhaseExtensionModuleTests
273 ) = util.test_both(MultiPhaseExtensionModuleTests, machinery=machinery)
274
275
276if __name__ == '__main__':
277    unittest.main()
278