NSubstitute完全手册（八）替换返回值

 1     public interface ICalculator
 2     {
 3       int Add(int a, int b);
 4       string Mode { get; set; }
 5     }
 6 
 7     [TestMethod]
 8     public void Test_ReplaceReturnValues_ReplaceSeveralTimes()
 9     {
10       var calculator = Substitute.For<ICalculator>();
11 
12       calculator.Mode.Returns("DEC,HEX,OCT");
13       calculator.Mode.Returns(x => "???");
14       calculator.Mode.Returns("HEX");
15       calculator.Mode.Returns("BIN");
16 
17       Assert.AreEqual(calculator.Mode, "BIN");
18     }