public void AddModel_Pass() { //Arrange datasource = new Mock <ISqliteDataAccess>(); datasource .Setup(m => m.AddModel <CrudModel>(GetModel(), It.IsAny <string>())) .Returns(int.MinValue); //Act mockLog = new Mock <ILog>(); var process = new DataBaseService(datasource.Object, mockLog.Object); var expected = 0; var actual = process.AddModel(GetModel()); //Assert Assert.Equal(expected, actual); }