Currently, there is no way to find run-cache in HTTP remotes.
In the future, we could use directory-listings from supported
webservers to find files.
Temporarily, we are restricting the run-cache uploads. This is a bit
strict, we could have only restricted the downloads, but it might be
more confusing to the users, so I went to categorically restrict
stage cache uploads and downloads for http filesystems.
The tests should be in dvc-objects repo npw, and will be migrated soon.
The nanotime and diskcache are specified in dvc-objects, so we don't need
those here.
This is a very early version of test utils for dvc plugins. This module
consists of existing tests with minimal changes and is going to evolve
a lot as our plugins are getting filled in and pytest-test-utils matures.