This tests that sort(compareFn) is a stable sort. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS arr[0] is sortArr[0] PASS arr[1] is sortArr[2] PASS arr[2] is sortArr[1] PASS arr[3] is sortArr[3] PASS arr[0] is sortArr[0] PASS arr[1] is sortArr[2] PASS arr[2] is sortArr[1] PASS arr[3] is sortArr[3] PASS successfullyParsed is true TEST COMPLETE