pomponchik / full_match

One function that makes the string matchable

full_match

When catching exceptions in Pytest, sometimes you need to check messages. Since the user sends a pattern for searching, and not a message for exact matching, sometimes similar, but not identical messages pass through the filter. This micro-library contains a function that makes Pytest check exception messages accurately.

It may also be useful to you if you use mutation testing tools such as mutmut.

Install it:

pip install full_match

And use:

import pytest
import full_match

def test_something():
  with pytest.raises(AssertionError, match='Regex pattern did not match.'):
    with pytest.raises(ValueError, match=full_match('Some message.')):
      raise ValueError('XXSome message.XX')

The message in the inner with block does not match the pattern exactly, so an AssertionError exception will occur in this example.