Python Testing with pytest

Using tmpdir and tmpdir_factory

The tmpdir and tmpdir_factory builtin fixtures are used to create a temporary file system directory before your test runs, and remove the directory when your test is finished. In the Tasks project, we needed a directory to store the temporary database files used by MongoDB and TinyDB. However, because we want to test with temporary databases that don’t survive past a test session, we used tmpdir and tmpdir_factory to do the directory creation and cleanup for us.

If you’re testing something that reads, writes, or modifies files, you can use tmpdir to create files or directories used by a single test, and you can use tmpdir_factory when you want to set up a directory for many tests.

The tmpdir fixture has function ...