Testing with HTF

Question

There's an incredible lack of decent documentation on HTF. All I could find was a Tutorial which doesn't provide any of the following really important information:

1. How do I create a test suite that automatically executes all tests from packages?
2. What exactly are those "Black box tests" of HTF and how do I create them?
3. What are the actual standards of setting up a test suite based on HTF (source root, packages and modules structure, cabal)?