Python Testing with pytest

Using tmp_path and tmp_path_factory

The tmp_path and tmp_path_factory fixtures are used to create temporary directories. The tmp_path function-scope fixture returns a pathlib.Path instance that points to a temporary directory that sticks around during your test and a bit longer. The tmp_path_factory session-scope fixture returns a TempPathFactory object. This object has a mktemp() function that returns Path objects. You can use mktemp() to create multiple temporary directories.

You use them like this:

ch4/test_tmp.py

def test_tmp_path(tmp_path):
    file = tmp_path / "file.txt"
    file.write_text("Hello")
    assert file.read_text() == "Hello"


def test_tmp_path_factory(tmp_path_factory):
    path = tmp_path_factory.mktemp("sub" ...