After a fresh clone/install of the project npm test is failing on some tests, when testing equality of array fixture v.s array produced by test.

The array content is similar to the fixture one, but not ordered the same way, failing jest expect.toEqual call.

After looking into it, it's just due to an incorrect implementation of the compareFunction provided to sort function. This function should return either 1 (if a > b), -1 (if a < b) or 0 (if a === b), but current implementation was returning a bool being coerced to 0 (if false) or 1 (if true), leading to the problem.

Please note that this failure wasn't noticed before because it is dependent on the version of node being used. I was running current LTS (12.15.0) when running into this test failure, but the test failure does not appear when running Node 8 (I didn't try other versions, so not sure from which version it appears). Probably due to a different internal implementation of the sort function in recent node versions, dealing a bit differently with ordering of identical values.