在C＃中获取属性设置器的方法名称

Question

I am using FakeItEasy to check that a call to the public setter method of a property has been called.

The property is called Description , and at the moment I am testing it like this:

A.CallTo(model)
    .Where(x => x.Method.Name.Equals("set_Description"))
    .WithAnyArguments()
    .MustHaveHappened();

This works functionally, however the downside of using a magic string for the method name is that if I refactor the name of the property, the test will fail and I will have to manually change the strings in all of the tests.

Ideally, I would like to know of a way to do it like in this piece of pseudocode:

var setterName = model.GetType()
                         .SelectProperty(x => x.Description)
                         .GetSetterName();

A.CallTo(model)
    .Where(x => x.Method.Name.Equals(setterName))
    .WithAnyArguments()
    .MustHaveHappened();

This way, if I right-click refactor the Description property, the tests won't need to be updated. How can I do this?

Answer 1

Your pseudocode was on the right track.

var setterName = model.GetType()
                     .GetProperty(nameof(Description))
                     .GetSetMethod();

Note that nameof is only available in C# 6.

Answer 2

I think you can do this with the nameof keyword: https://msdn.microsoft.com/en-us/library/dn986596.aspx

So I guess it would be something like

.Where(x => x.Method.Name.Equals("set_" + nameof(x.Description))

Answer 3

请注意，从FakeItEasy 2.0.0开始，如果setter也具有getter，则可以使用新的A.CallToSet方法 ：

A.CallToSet(() => model.Description).MustHaveHappened();