from django.core.exceptions import ValidationError from testfixtures import ShouldRaise from testfixtures.shouldraise import ShouldAssert class TestShouldRaiseWithValidatorErrors(object): def test_as_expected(self): with ShouldRaise(ValidationError("d'oh")): raise ValidationError("d'oh") def test_not_as_expected(self): message = ( 'ValidationError(["d\'oh"]) (expected) != ' 'ValidationError([\'nuts\']) (raised)' ) with ShouldAssert(message): with ShouldRaise(ValidationError("d'oh")): raise ValidationError("nuts")