set-length-sparse-3.js

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function testMaxLength() {

  let arr = [];

  const MAX_ARRAY_INDEX = 2 ** 32 - 2;

  arr[MAX_ARRAY_INDEX] = 1;

  arr[MAX_ARRAY_INDEX + 1] = 1;

  assertEq(arr.length, MAX_ARRAY_INDEX + 1);

  arr.length = 0;

  assertEq(arr[MAX_ARRAY_INDEX], undefined);

  assertEq(arr[MAX_ARRAY_INDEX + 1], 1);

  assertEq(Object.keys(arr).length, 1);

testMaxLength();