This tests some sparse array operations. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS array[0] is undefined PASS array[49999] is undefined PASS array[50000] is 100 PASS array[50001] is undefined PASS array[0] is NaN PASS array[49999] is undefined PASS array[50000] is 100 PASS array[50001] is undefined PASS successfullyParsed is true TEST COMPLETE