Framework: return storedVariation if we have one #6904
Merged
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I'd like to propose that we honor any stored variation if/when we have one for tests that have not yet started. This makes it much easier to test the different variations by using the bug badge abtest helper to manually set variations.
So now for a test that has not yet started, we will return any value currently stored in localStorage first, and if we don't have one, we will return the default variation.
Testing
Make sure this doesn't destroy all things. Maybe try a known test and make sure it still works as expected. But mostly think through the change to see if you can think of any reason we wouldn't want to do this.
/cc @retrofox @apeatling @dmsnell
Test live: https://calypso.live/?branch=update/abtest-allow-savedvariation-preview