Custom Test Adapter is not showing tests on Test Explorer

Question

I am trying to implement a custom Test Adapter, all the files are bellow:

• TSTestDiscoverer.cs
• TSTestExecutor.cs
• TSTestContainer.cs
• TSTestContainerDiscoverer.cs
• VsSolutionHelper.cs^{from XMLTestDiscoverer source code}

Using

vstest.console.exe /listdiscoverers /usevsixextensions:true

I confirmed that the extension is installed and it is listed on the test discoverers.

Running

vstest.console.exe file.ts

I confirmed that both TSTestDiscoverer and TSTestExecutor are working correctly.

Now I want to list the tests on Test Explorer, for that I guess I need ITestContainer and ITestContainerDiscoverer. I tried to implement both, but something is not working, the Test Explorer does not show any tests...

What did I do wrong? How can I find out what is not working?

Answer 1

I forgot to add an attribute on the class that implements ITestContainerDiscoverer.

[Export(typeof(ITestContainerDiscoverer))]

Now it is working.