如何检查属性[]是否已被使用

Question

I use Vs2015 with NSubstitute 3.1.0. This code is passed but shouldn't.

public class Test
{
    public string[] Content { get; set; }
}
[Fact]
public void Should_What()
{
    var obj = Substitute.For<Test>();
    var test = obj.DidNotReceive().Content;
    var test2 = obj.Received().Content;
}

If replace class Test to interface it will works well, but in my test I have class.

How to check if property Content has been used?

Answer 1

The solution is to use virtual for the property.

public virtual string[] Content { get; set; }

But, if two opposing tests return the True at the same time, we have a bug. Can explain why and indicate a solution, but this is a workaround.

In my opinion it should throw an exception (ex. NotSupportedException, when a test is executed on non-virtual properties). The testing environment is expected to detect the problems. So it should be pessimistic. In this case should be better to return false instead of true. To sign the developer the problem (even if it is in the framework). For example in SQL when try to check null value, will always return false (null == true, null == 0 or even null == null). This is just my point. What do you guys think about it?