pytest-expected

This pytest fixture lets you write tests that compare to a previously known, recorded value:

def test_something(expected):
    assert something(frobnicate=True) == expected

When called with --record, pytest will accept any value and store it in a file in the hidden .expected directory under the pytest root folder (usually the repository root).

When called without --record, it will load the known value(s) from that store, and assert that they are equal to the observed values.

Any picklable value can be stored.

You can also use expected several times in a test for different values, and it'll figure out the rest.

pytest-expected organizes storage based on:

• Test ID (typically includes path to test file, test name, and parametrizations)
• Number of uses of expected