public void GetTopTags_GetResult_NotFail_Test() { var expected = new List <Tag>() { new Tag() }; bool called = false; int organizerId = 1; IEventDefinitionRepository eventDefinitionService = new StubIEventDefinitionRepository() { GetTopTagsInt32 = (id) => { called = true; return(expected); } }; var target = new TagsController(eventDefinitionService); IEnumerable <Tag> actual = target.GetTopTags(organizerId); Assert.IsTrue(called); Assert.AreEqual(expected.Count, actual.Count()); }