https://hackmd.io/axI1tQdwQB2pTJKt5XdY5w#Next-gen-conda-recipe-spec
It would be great if there was a better story for optional dependencies.
The special-casing of test requirements is inconsistent with the requirements for host/build/run.
The fact that you can't independently install the test dependencies is a huge usability wart and suggests there should be a better way of supporting them.