1# Licensed under the Apache License, Version 2.0 (the "License");
2# you may not use this file except in compliance with the License.
3# You may obtain a copy of the License at
4#
5#      http://www.apache.org/licenses/LICENSE-2.0
6#
7# Unless required by applicable law or agreed to in writing, software
8# distributed under the License is distributed on an "AS IS" BASIS,
9# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
10# See the License for the specific language governing permissions and
11# limitations under the License.
12
13"""
14Tests for patching modules loaded after `setUpPyfakefs()`.
15"""
16import pathlib
17import unittest
18
19from pyfakefs import fake_filesystem_unittest
20
21
22class TestPyfakefsUnittestBase(fake_filesystem_unittest.TestCase):
23    def setUp(self):
24        """Set up the fake file system"""
25        self.setUpPyfakefs()
26
27
28class DynamicImportPatchTest(TestPyfakefsUnittestBase):
29    def __init__(self, methodName="runTest"):
30        super(DynamicImportPatchTest, self).__init__(methodName)
31
32    def test_os_patch(self):
33        import os
34
35        os.mkdir("test")
36        self.assertTrue(self.fs.exists("test"))
37        self.assertTrue(os.path.exists("test"))
38
39    def test_os_import_as_patch(self):
40        import os as _os
41
42        _os.mkdir("test")
43        self.assertTrue(self.fs.exists("test"))
44        self.assertTrue(_os.path.exists("test"))
45
46    def test_os_path_patch(self):
47        import os.path
48
49        os.mkdir("test")
50        self.assertTrue(self.fs.exists("test"))
51        self.assertTrue(os.path.exists("test"))
52
53    def test_shutil_patch(self):
54        import shutil
55
56        self.fs.set_disk_usage(100)
57        self.assertEqual(100, shutil.disk_usage("/").total)
58
59    def test_pathlib_path_patch(self):
60        file_path = "test.txt"
61        path = pathlib.Path(file_path)
62        with path.open("w") as f:
63            f.write("test")
64
65        self.assertTrue(self.fs.exists(file_path))
66        file_object = self.fs.get_object(file_path)
67        self.assertEqual("test", file_object.contents)
68
69
70if __name__ == "__main__":
71    unittest.main()
72