When invoking "run test(s)" in abstract class, ask which concrete subclass to use

[dstango]

Consider a setup in which there is an abstract base class that contains some tests, and one or several concrete subclasses, that setup different test fixtures for the tests. Examples: selenium tests for different browsers, tests to be executed against differing databases, alternative implementations for a common interface.

Currently it's not possible be in that abstract base class and invoke a single test, or all of the tests in the class.

I propose to make MoreUnit aware of such a situation, and behave as follows:

If trying to run in an abstract class, MoreUnit should check for concrete subclasses of the abstract class and distinguish these situations:

• there's only one concrete subclass: then the test should be run as a test of this subclass
• there are several concrete subclasses:
  • show a popup and let the user choose which concree class to use,
  • the popup should contain an option "all concrete subclasses" that executes the method in all subclasses (ideally as last option, so a press of the "end" key directly moves the selection to this option),
  • the last run subclass should be on top, so a single press of "enter" would invoke this option, making it easy to repeatedly run the same test.

The same logic should be applied when trying to invoke a test from the CUT.