# Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # Example for a test using a custom pytest fixture with an argument to Patcher import os import pytest import pyfakefs.pytest_tests.example as example @pytest.mark.xfail def test_example_file_failing(fs): """Test fails because EXAMPLE_FILE is cached in the module and not patched.""" fs.create_file(example.EXAMPLE_FILE, contents="stuff here") check_that_example_file_is_in_fake_fs() @pytest.mark.parametrize("fs", [[None, [example]]], indirect=True) def test_example_file_passing_using_parametrized_fixture(fs): """Test passes if using a fixture that reloads the module containing EXAMPLE_FILE""" fs.create_file(example.EXAMPLE_FILE, contents="stuff here") check_that_example_file_is_in_fake_fs() def check_that_example_file_is_in_fake_fs(): with open(example.EXAMPLE_FILE) as file: assert file.read() == "stuff here" with example.EXAMPLE_FILE.open() as file: assert file.read() == "stuff here" assert example.EXAMPLE_FILE.read_text() == "stuff here" assert example.EXAMPLE_FILE.is_file() def test_twice_chdir(fs): # regression test for #530 - make sure that # alternative path separators are correctly handled under Windows fs.create_dir("/absolute/path/to/directory") os.chdir("/absolute/path/to/directory") os.chdir("/absolute/path/to/directory")