Add tests configurations

[antoinejeannot]

This PR aims at introducing test_cases in the CONFIGURATIONS map defined at class level, so that to be able to write tests restricted to a given model.

Moreover, TEST_CASES is now the way to go if you want to define upper-level class tests, which will be ran for every model configuration.

E.g.:

class TestableModel(Model[ModelItemType, ModelItemType]):
    CONFIGURATIONS: Dict[str, Dict] = {
        "some_model_a": { 
            "test_cases": {
                "cases": [
                    {"item": {"x": 1}, "result": {"x": 1}},
                    {"item": {"x": 2}, "result": {"x": 2}},
                ],
            }
        },
        "some_model_b": {},
    }
    def _predict(self, item):
        return item

Thanks for reviewing

[victorbenichoux]

Thank you so much for the contribution, this is extremely useful. I think we need to remove the added level of cases in both of the uses, but other than that it looks good to me

[victorbenichoux]

I added a couple of commits, fixing some naming issues, removing the "cases" sublevel, and also adding the correct type for TEST_CASES. PTAL @antoinejeannot

[antoinejeannot]

I added a couple of commits, fixing some naming issues, removing the "cases" sublevel, and also adding the correct type for TEST_CASES. PTAL @antoinejeannot

Great ! I didn't know if we wanted to keep the extra "cases" level, so I made it so that both systems are consistent.
And you're right, it's better to remove it for now since it is not used at all.
Thanks for the additional commits, I'll check this out

[antoinejeannot]

Perfect, thanks for your help!