Change tests so different backends are not tested in the same test

[zerothi]

One should use pytest.mark.parametrize instead, here we can even allow importorskip.
This would be more stable and easier to test going forward.

[Chrillebon]

Agreed. However, not all tests will work like this, as the kwargs will be sent to the specific backend.

[zerothi]

I don't know what you mean?

This would work just fine:

@pytest.mark.parametrize("backend", [
MP, pytest.param(PB, pytest.mark.skipif(... plotly importable)])
def test_quiver(backend):
    dtuplot.quiver(..., backend=backend)

with some changes to make it fully functional.

[zerothi]

There are many ways to expand on this.
But the idea would be to explicitly create tests for each backend. Having everything in 1 is not ideal.

[Chrillebon]

Agreed! And the addition of the skipif not importable is a great way of getting around the challenges with not every backend being installed as default!