public void CallDAtabaseContext_SaveMethod() { // Arrange var mockDbContext = new Mock <IDatabaseContext>(); mockDbContext.Setup(c => c.Save()).Returns(1).Verifiable(); var lectureService = new LectureService(mockDbContext.Object); // Act var result = lectureService.Save(); // Assert Assert.AreEqual(1, result); mockDbContext.Verify(c => c.Save(), Times.Once); }