c# - Moq 定义严格的模拟

Question

是否可以在 Moq 中定义严格的行为？

我想调用ReadLine两次，但为两次不同的调用定义不同的返回值。请参阅下面的代码示例:

最小起订量示例(失败)

[Test]
public void ExampleDifferentResultOnReadLine()
{
    var textReader = new Mock<TextReader>(MockBehavior.Strict);
    textReader.Setup(reader => reader.ReadLine()).Returns("Bla");
    textReader.Setup(reader => reader.ReadLine()).Returns("Bla1");

    var str = textReader.Object.ReadLine();
    var str1 = textReader.Object.ReadLine();

    Assert.AreEqual("Bla", str); // Fails: mocks returns Bla1
    Assert.AreEqual("Bla1", str1);
}

Rhino 模拟示例(成功)

public void ExampleDifferentResultOnReadLine()
{
    var textReader = MockRepository.GenerateStrictMock<TextReader>();
    // var textReader = new Mock<TextReader>(MockBehavior.Strict);
    textReader.Expect(reader => reader.ReadLine()).Return("Bla");
    textReader.Expect(reader => reader.ReadLine()).Return("Bla1");

    var str = textReader.ReadLine();
    var str1 = textReader.ReadLine();

    Assert.AreEqual("Bla", str);
    Assert.AreEqual("Bla1", str1);
}

最小起订量也可以吗？

Answer 1

模拟构造函数接受MockBehavior枚举值:

var textReader = new Mock<TextReader>(MockBehavior.Strict);

顺便说一句，测试调用顺序的正确代码将是(因为 RhinoMocks 添加了期望，而 Moq 仅使用您提供的最后一个值):

var textReader = new Mock<TextReader>();
textReader.SetupSequence(r => r.ReadLine())
          .Returns("Bla")
          .Returns("Bla1");

var str = textReader.Object.ReadLine();
var str1 = textReader.Object.ReadLine();

Assert.AreEqual("Bla", str);
Assert.AreEqual("Bla1", str1);