mozilla / addons-linter / 3451

100%

Pull #1334

travis-ci

Switch our test suite to use Jest test runner.

* Fix javascript test to use new eslint rule format.
* Cleanup dependencies, configure runInBand because we are messing with processes and this leads to inconsisten test results / failures
* Add test-ci shortcut to make tests more predictable and simpler (no process magic) on travis.
* Add missing files
* Fix testMatch
* Fix test and test-no-coverage commands
* Fix default value in manifestjson to be the same key as in the parsedJSON later
* Simplify addons linter test
* Add some optimizations
* Rewrite cli-process test to not rely on shell js and make it work with jest.
* Lots of cleanups, fix toThrow tests to check for messages again.
* re-add eslint, remove more stuff from Gruntfile
* Add proper eslintignore file
* Lots of cleanups, fix all remaining eslint problems.
* Do not test our workaround, that'll be a mess...
* Add test that checks for importSchemas to skip certain files.
* activate jest environment, remove custom global entries
* add collectCoverageFrom config
* remove some old, removed, uncovered code.
* more test fixes
* add missing file

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