[Telemetry] Add pyfakefs to telemetry/third_party

tools/telemetry/third_party/pyfakefs/pyfakefs/all_tests.py

+#! /usr/bin/env python
+#
+# Copyright 2009 Google Inc. All Rights Reserved.
+#
+# 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.
+
+"""A test suite that runs all tests for pyfakefs at once."""
+
+import unittest
+
+import fake_filesystem_glob_test
+import fake_filesystem_shutil_test
+import fake_filesystem_test
+import fake_filesystem_vs_real_test
+import fake_tempfile_test
+import fake_filesystem_unittest_test
+import example_test
+
+
+class AllTests(unittest.TestSuite):
+  """A test suite that runs all tests for pyfakefs at once."""
+
+  def suite(self):  # pylint: disable-msg=C6409
+    loader = unittest.defaultTestLoader
+    self.addTests([
+        loader.loadTestsFromModule(fake_filesystem_test),
+        loader.loadTestsFromModule(fake_filesystem_glob_test),
+        loader.loadTestsFromModule(fake_filesystem_shutil_test),
+        loader.loadTestsFromModule(fake_tempfile_test),
+        loader.loadTestsFromModule(fake_filesystem_vs_real_test),
+        loader.loadTestsFromModule(fake_filesystem_unittest_test),
+        loader.loadTestsFromModule(example_test),
+    ])
+    return self
+
+if __name__ == '__main__':
+  unittest.TextTestRunner(verbosity=2).run(AllTests().suite())