sort-delete-ascending-order.js

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// Calls Array.prototype.sort and tests that properties are deleted in the same order in the

// native and the self-hosted implementation.

function createProxy() {

  var deleted = [];

  var proxy = new Proxy([, , 0], {

    deleteProperty(t, pk){

      deleted.push(pk);

      return delete t[pk];

});

  return {proxy, deleted};

function compareFn(a, b) {

  return a < b ? -1 : a > b ? 1 : 0;

// Sort an array without a comparator function. This calls the native sort implementation.

var {proxy, deleted} = createProxy();

assertEqArray(deleted, []);

proxy.sort()

assertEqArray(deleted, ["1", "2"]);

// Now sort an array with a comparator function. This calls the self-hosted sort implementation.

var {proxy, deleted} = createProxy();

assertEqArray(deleted, []);

proxy.sort(compareFn);

assertEqArray(deleted, ["1", "2"]);

if (typeof reportCompare === "function")

  reportCompare(true, true);