test: Add betterer #9987
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test: Add betterer #9987
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Betterer is a snapshot test runner which tries to reduce the number of errors. With, for example, eslint, we need to get to 0 errors for the test to pass. This is prohibitive for large changes (e.g. turning on a new eslint option), as you then have to make a lot of changes in the same pull request. For betterer, you only have to avoid making the test fail *more*, so it's OK to fix errors or leave things alone. --- It runs as a part of check, and outputs (but doesn't block) building. You can also run it manually, in the same way as prettier or eslint $ make betterer And get it to update its snapshots, again in the same way as prettier $ make betterer-write --- I avoided adding the betterer precommit, as running eslint takes a long while and this blocked the commit for longer than I considered acceptable. There's probably a way to make this work with eslint-d and a custom test, but even so it's likely custom, brittle and non-ideal. Signed-off-by: Skyler Grey <[email protected]> Change-Id: I1770a1a8be3f45b45bda0fd2bcd57563add25924
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Betterer is a snapshot test runner which tries to reduce the number of errors. With, for example, eslint, we need to get to 0 errors for the test to pass. This is prohibitive for large changes (e.g. turning on a new eslint option), as you then have to make a lot of changes in the same pull request. For betterer, you only have to avoid making the test fail more, so it's OK to fix errors or leave things alone.
It runs as a part of check, and outputs (but doesn't block) building.
You can also run it manually, in the same way as prettier or eslint
$ make betterer
And get it to update its snapshots, again in the same way as prettier
$ make betterer-write
I avoided adding the betterer precommit, as running eslint takes a long while and this blocked the commit for longer than I considered acceptable. There's probably a way to make this work with eslint-d and a custom test, but even so it's likely custom, brittle and non-ideal.
This is a prerequisite for #9975, which is a prerequisite for #8221
Summary
TODO
Checklist
make prettier-writeand formatted the code.make checkmake runand manually verified that everything looks okay