so it looks like some tests (v2 tests I think) are using

Console

with mock stdout and stderr passed into them as the test console, and other tests (maybe v1-only tests?) are using a special

MockConsole

data structure

We use it in the V2 fmt and lint tests: https://github.com/pantsbuild/pants/blob/76c14d4961f2740ddd8eada0965e793e7521c0d2/src/python/pants/rules/core/fmt_test.py#L60