pytest Quick Start Guide

Text differences

When showing the explanation for short strings, pytest uses a simple difference method:

_____________________ test_default_player_class _____________________    def test_default_player_class():        x = get_default_player_class()>       assert x == 'sorcerer'E       AssertionError: assert 'warrior' == 'sorcerer'E         - warriorE         + sorcerer

Longer strings show a smarter delta, using difflib.ndiff to quickly spot the differences:

__________________ test_warrior_short_description ___________________    def test_warrior_short_description():        desc = get_short_class_description('warrior')>       assert desc == 'A battle-hardened veteran, can equip heavy armor and weapons.'E AssertionError: assert 'A battle-har... and weapons.' == 'A battle-hard... and weapons.' ...