public void GetCommaDelimitedTags_Test() { // arrange MockItem testItem = new MockItem(); testItem.Tags = new List <Tag> { new Tag { Id = 1, Name = "History" }, new Tag { Id = 2, Name = "Trains and railways" }, new Tag { Id = 3, Name = "Fiction" } }; string expectedResult = "History, Trains and railways, Fiction"; // act string actualResult = testItem.GetCommaDelimitedTags(); // assert Assert.AreEqual(expectedResult, actualResult); }