Integrate cocotb-test into cocotb

I would like to know if there is consensus to merge cocotb-tests in current form into cocotb?

In case you would like to see this in should I prepare one big PR or split somehow into smaller pieces?

cocotb-test provides standard python unit testing capabilities

• compiles the libraries during setup/installation phase using setuptools (separate directory for every simulator)
• uses python to start simulators (remove the need for Makefiles), includes Makefile compatibility mode
• provides simple pytest plugin to merge results
• allow the look and feel of Python unit testing
• allow easy customization of simulation flow
• easy installation (especially on Windows)
• can create wheel package (no need to compile libraries by user)
• allow to use pytest-xdist / pytest-parallel

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Talk from WOSDV 2019: cocotb-test_WOSDV2019.pdf

[eric-wieser]

I think there are two different approaches here. cocotb-test is a wrapper around the entirety of cocotb, which runs cocotb inside pytest. For this reason, I don’t think we should merge the entirety of cocotb-test into cocotb, in the same was as pytest-cov is not merged into coverage.

Independently, I’d like to make it possible to host pytest inside cocotb, which ultimately requires making the RegressionManager swappable for another test runner. There are a few scheduler refactors needed to make this work, of which the top of the queue is #1173

[themperek]

Done in https://github.com/cocotb/cocotb/pull/2634