public void CanGetAll() { var apiEntities = new[] { new ApiSample { Id = Guid.NewGuid() }, new ApiSample { Id = Guid.NewGuid() } }; var idsBefore = apiEntities.Select(x => x.Id); var sampleController = new SampleController(service); var resultEntities = sampleController.GetAll().ToArray(); Assert.AreEqual(0, resultEntities.Length); service.Write(apiEntities); var resultIds = sampleController.GetAll().Select(x => x.Id).ToArray(); CollectionAssert.AreEquivalent(idsBefore, resultIds); }