port unicode tests to pytest

[loechel]

No description provided.

[icemac]

I see no reason why to port this test. Before releasing RP 4 we will delete the old implementation, and its tests. Or did I miss something here?

[stephan-hof]

I agree with @icemac.
As the comment said ast.parse is a core method so we don't have to test it.
I also don't see a reason why keeping the test for _niceParse.

However I could image that we add some tests with unicode strings (not in the ASCII range) passed to the transformer itself or when the print functions are tested.

[loechel]

Well It was just the idea to move all old tests into our new schema, thats why I also commented that so.

We should still test the old code to see if everything still works, when we move things around.

[icemac]

@loechel We are currently testing the old code using the old tests, see tox.ini. So I see no need to port these tests.