array-splice.js - mozsearch

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function test1() {

    // splice GetElement calls are observable and should be executed even if

    // the return value of splice is unused.

    Object.defineProperty(Object.prototype, "0", {get: function() {

	c++;

    }, set: function() {}});

    var arr = [,,,];

    var c = 0;

    for (var i=0; i<100; i++) {

	arr.splice(0, 1);

	arr.length = 1;

    assertEq(c, 100);

test1();

function test2() {

    var arr = [];

    for (var i=0; i<100; i++)

	arr.push(i);

    for (var i=0; i<40; i++)

	arr.splice(0, 2);

    assertEq(arr.length, 20);

    assertEq(arr[0], undefined);

    assertEq(arr[1], 81);

test2();

function testNonArray() {

    for (var i=0; i<10; i++) {

	var o = {splice:[].splice, 0:"a", 1:"b", 2:"c", length:3};

	o.splice(0, 2);

	assertEq(o.length, 1);

	assertEq(o[0], "c");

testNonArray();