public void Should_work_with_array() { var mapFromArray = new SampleMapFrom[] { new SampleMapFrom { Id = 1, Name = "Name1" }, new SampleMapFrom { Id = 2, Name = "Name2" }, }; IMapper <SampleMapFrom, SampleMapTo> mapper = new DemoMapper(); var mappedResult = mapper.Map(mapFromArray); mappedResult.Should().NotBeEmpty() .And.HaveCount(mapFromArray.Count()); //TODO: Need to check how to comapre 2 different type collection in fluent assertation }