public void WithButtons_should_return_CardActionSetAssertions() { var buttons = CardActionTestData.CreateRandomCardActions(); var thumbnailCards = ThumbnailCardTestData.CreateThumbnailCardSetWithOneCardThatHasSetProperties(buttons: buttons); var sut = new ThumbnailCardSetAssertions(thumbnailCards); sut.WithButtons().Should().BeAssignableTo <CardActionSetAssertions>().And.NotBeNull(); }