聊聊程式

前言

當遇到沒有回傳值得時候，就可以透過執行幾次該方法去驗證 或是 比較複雜的流程
應該要重複執行方法時也可以用檢查執行幾次的方式驗證

Received的設定

直接看程式碼

        public interface ICalculator
        {
            void Clear(int level);
        }

        public class MyDemo
        {
            private readonly ICalculator _calculator;
            public MyDemo(ICalculator calculator)
            {
                this._calculator = calculator;
            }
            public void Action1(bool clearFlag)
            {
                if (clearFlag == true)
                {
                    this._calculator.Clear(7);
                }
            }
          
        }

        [TestMethod]
        public void test1()
        {
            //arrange
            //NSubstitute會產生一個ICalculator 假的實體出來
            ICalculator calculator = Substitute.For<ICalculator>();

            var myDemo = new MyDemo(calculator);

            //act
            myDemo.Action1(true);
            
            //assert
            calculator.Received(1).Clear(7);
            calculator.DidNotReceive().Clear(1);
            calculator.Received(1).Clear(Arg.Any<int>());
            calculator.ReceivedWithAnyArgs(1).Clear(default(int));
        }

        [TestMethod]
        public void test2()
        {
            //arrange
            //NSubstitute會產生一個ICalculator 假的實體出來
            ICalculator calculator = Substitute.For<ICalculator>();

            var myDemo = new MyDemo(calculator);

            //act
            myDemo.Action1(false);

            //assert
            calculator.DidNotReceive().Clear(0);
            calculator.DidNotReceive().Clear(Arg.Any<int>());
            calculator.DidNotReceiveWithAnyArgs().Clear(default(int));
        }

這邊用到的觀念跟之前都一樣要驗證方法被執行次數與參數要指定時就是用
calculator.Received(1).Clear(7);
如果會執行到兩次的話就是Received(2)
不要管參數的時候 還是可以用 Arg.Any() 或 ReceivedWithAnyArgs

如果不應該被執行就是用 DidNotReceive 也就是Received(0)
建議大家用 DidNotReceive 這樣閱讀起來比較直覺

結語

接下來介紹ref 或 out 的用參數當回傳值該如何處理