Today in PyTorch we have TORCH_WARN and TORCH_WARN_ONCE. TORCH_WARN_ONCE, as its name suggests, only throws a warning one time. This makes it tricky to test for. Our test suite, for example, has maybeWarnsRegex, but this just verifies that no other warnings are thrown.

This feature request is for a mechanism to consistently trigger warnings that use TORCH_WARN_ONCE. One mechanism for this would be to add a new context that, if set, causes these warnings to always warn. This would let us reliably test that these warnings are thrown correctly.

cc @ezyang @gchanan @zou3519 @bdhirsh @jbschlosser @mruberry @VitalyFedyunin @walterddr