c# - 如何获得最小起订量设置以根据输入更改输出参数？

Question

最小起订量支持设置输出参数 - 没问题。我希望能够根据调用中传递的内容通过 Returns() 或 Callback() 设置参数。我的用例涉及模拟一个带有 out 参数的方法。

这是我用来做实验的东西，到目前为止每次都是负面结果:

public interface ITestClass
{
    string method(string inString, out string outString);
}

public class TestClass : ITestClass
{
    public string method(string inString, out string outString)
    {
        outString = inString + " was passed in";
        return (inString + " was returned");
    }
}

[TestFixture]
public class OutTest
{
    [Test]
    public void Test()
    {
        //Arrange
        Mock<ITestClass> mock = new Mock<ITestClass>(MockBehavior.Strict);
        string stringParm = "value that will be assigned to out parameter";
        mock.Setup(t => t.method(It.IsAny<string>(), out stringParm))
            .Returns((string i, string o) =>
            {
                return i + " was returned"; // o = stringParm already
            })
            .Callback((string s, string oo) =>
            {
                stringParm = s + " was passed in"; // oo = stringParm already
            });
        TestClass real = new TestClass();
        string testString = DateTime.Now.ToLongTimeString();

        //Act
        string realOut;
        string mockOut;
        string realResult = real.method(testString, out realOut);
        string mockResult = mock.Object.method(testString, out mockOut);

        //Assert
        realResult.Should().Be(mockResult); // passes
        realOut.Should().Be(mockOut); // fails - mockout = original stringParm
    }
}

Answer 1

我知道这并不理想，但为什么不传递结果预期的 mockOut 而不是 "value that will be assigned to out parameter" ？

与

string stringParm = "foo was passed in"