filesystems/py-pyfakefs 5.8.0 DragonFly

pyfakefs implements a fake file system that mocks the Python file system modules. Using pyfakefs, your tests operate on a fake file system in memory without touching the real disk. The software under test requires no modification to work with pyfakefs.

Pyfakefs creates a new empty in-memory file system at each test start, which replaces the real filesystem during the test. Think of pyfakefs as making a per-test temporary directory, except for an entire file system.

There are several means to achieve this: by using the fs fixture if running pytest, by using fake_filesystem_unittest.TestCase as a base class if using unittest, by using a fake_filesystem_unittest.Patcher instance as a context manager, or by using the patchfs decorator.