public void WithFact_should_return_FactSetAssertions() { var facts = FactTestData.CreateRandomFacts(); var cards = ReceiptCardTestData.CreateReceiptCardSetWithAllCardsWithSetProperties(facts: facts); var sut = new ReceiptCardSetAssertions(cards); sut.WithFact().Should().BeAssignableTo <FactSetAssertions>().And.NotBeNull(); }