How to find dll files containing nunit tests

Question

I have a folder with many dlls. One of them contains nunit tests (functions marked with [Test] attribute). I want to run nunit test from c# code. Is there any way to locate the right dll?

thank you

Answer 1

You can use Assembly.LoadFile method to load a DLL into an Assembly object. Then use the Assembly.GetTypes method to get all the types defined in the assembly. Then using the GetCustomAttributes method you can check if the type is decorated with the [TestFixture] attribute. If you want it quick 'n dirty, you could just call .GetType().ToString() on each attribute and check if the string contains "TestFixtureAttribute".

You can also check for the methods inside each type. Use the method Type.GetMethods to retrieve them, and use GetCustomAttributes on each of them, this time searching for "TestAttribute".