public void Get_WhenCalled_ReturnsThreeItems() { // Arrange var data = this.GetTestList(); var mockSet = GetQueryableMockDbSet(data); var mockContext = new Mock <HelloESDCContext>(); mockContext.Setup(c => c.Greetings).Returns(mockSet.Object); var service = new GreetingService(mockContext.Object); // Act var greetings = service.GetAllItems(); // Assert greetings.Count().Should().Be(3); }