Dependencies are stale

[jaraco]

In an attempt to re-use unchanged dependencies, the test runner invokes the persistent strategy:

coherent.test/__main__.py

Line 11 in aaacd57

PIP_RUN_RETENTION_STRATEGY='persist',

Unfortunately, the way that strategy is implemented, it keys the environment on the requirements, which are always .[test] (even across projects), meaning that from run to run, the same environment is used even if the dependencies (or project under test) have changed, leading to ImportErrors when those dependencies are used.

Probably, the pip-run persistent strategy should resolve the dependencies and then key on the solved dependency tree... or at least key on the resolution of the indicated dependencies (i.e. expand requirements.txt and dependencies implied by local paths).

[jaraco]

Disabling the persistent strategy works around the issue, so it can be closed. We'll want to track a more permanent solution and re-enable re-used environments, but that's something that can wait.

[jaraco]

I noticed you re-opened this issue. I wasn't really sure why. Now I realize it was I mistakenly pointed to this issue instead of another. Glad to see you making some progress on a more permanent solution!