public void AddPerson_WhenCalled_SavePersonInDB() { string fName = ""; string lName = ""; _dataAccess.Setup(db => db.SaveData <PersonModel>(It.IsAny <PersonModel>(), It.IsAny <string>()) ).Callback((PersonModel person, string sql) => { fName = person.FirstName; lName = person.LastName; }); _consoleDataProcessor.AddPerson("John", "Doe"); Assert.That(fName == "John" && lName == "Doe"); }