Unit testing properties of a class using C# and reflection

Question

I'm facing some difficulties with unit testing in C#.

Let's say I have

class Dummy{
    TypeA Foo {get; set;}
    TypeB Bar {get; set;}
}

and the test method

[TestMethod]
public void TestStuff()
{
    Type type = typeof(Dummy);
    PropertyInfo[] properties = type.GetProperties();

    foreach(PropertyInfo property in properties)
    {
        string result= MyStaticClass.ProcessProperty(property.Name);
        Assert.IsFalse(string.IsNullOrWhiteSpace(result));
    }
}

The test runs fine, but when it fails I have no clue about which property causes the problem.

In other test methods I've used the [DataTestMethod] and [DataRow(stuff)] in order to provide single inputs and know what caused the test to fail.

Is there a way to do something like this using reflection?

Am I thinking of a wrong unit test?

I'd like to use this approach to check consistency, is it wrong at all?

Can you not just add a message to your assert saying what property has failed, etc.? — Chris
– Chris, Commented Nov 20, 2018 at 9:39
@magicleon: I've not really got anything to add that isn't in Carlos's answer so not going to post my own. I'm happy for him to get the upvotes and the accept. :) — Chris
– Chris, Commented Nov 20, 2018 at 9:55

Carlos Garcia · Accepted Answer · 2018-11-20 09:44:13Z

4

Assert has many interesting properties params!

You can do something like:

Assert.IsFalse(string.IsNullOrWhiteSpace(result), $"{property.Name} is null");

answered Nov 20, 2018 at 9:44

Carlos Garcia

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