fill.js - mozsearch

/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */

/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/licenses/publicdomain/ */

//-----------------------------------------------------------------------------

var BUGNUMBER = 911147;

var summary = 'Array.prototype.fill';

print(BUGNUMBER + ": " + summary);

/**************

 * BEGIN TEST *

 **************/

assertEq(typeof [].fill, 'function');

assertEq([].fill.length, 1);

// Default values for arguments and absolute values for negative start and end

// arguments are resolved correctly.

assertDeepEq([].fill(1), []);

assertDeepEq([1,1,1].fill(2), [2,2,2]);

assertDeepEq([1,1,1].fill(2, 1), [1,2,2]);

assertDeepEq([1,1,1].fill(2, 1, 2), [1,2,1]);

assertDeepEq([1,1,1].fill(2, -2), [1,2,2]);

assertDeepEq([1,1,1].fill(2, -2, -1), [1,2,1]);

assertDeepEq([1,1,1].fill(2, undefined), [2,2,2]);

assertDeepEq([1,1,1].fill(2, undefined, undefined), [2,2,2]);

assertDeepEq([1,1,1].fill(2, 1, undefined), [1,2,2]);

assertDeepEq([1,1,1].fill(2, undefined, 1), [2,1,1]);

assertDeepEq([1,1,1].fill(2, 2, 1), [1,1,1]);

assertDeepEq([1,1,1].fill(2, -1, 1), [1,1,1]);

assertDeepEq([1,1,1].fill(2, -2, 1), [1,1,1]);

assertDeepEq([1,1,1].fill(2, 1, -2), [1,1,1]);

assertDeepEq([1,1,1].fill(2, 0.1), [2,2,2]);

assertDeepEq([1,1,1].fill(2, 0.9), [2,2,2]);

assertDeepEq([1,1,1].fill(2, 1.1), [1,2,2]);

assertDeepEq([1,1,1].fill(2, 0.1, 0.9), [1,1,1]);

assertDeepEq([1,1,1].fill(2, 0.1, 1.9), [2,1,1]);

assertDeepEq([1,1,1].fill(2, 0.1, 1.9), [2,1,1]);

assertDeepEq([1,1,1].fill(2, -0), [2,2,2]);

assertDeepEq([1,1,1].fill(2, 0, -0), [1,1,1]);

assertDeepEq([1,1,1].fill(2, NaN), [2,2,2]);

assertDeepEq([1,1,1].fill(2, 0, NaN), [1,1,1]);

assertDeepEq([1,1,1].fill(2, false), [2,2,2]);

assertDeepEq([1,1,1].fill(2, true), [1,2,2]);

assertDeepEq([1,1,1].fill(2, "0"), [2,2,2]);

assertDeepEq([1,1,1].fill(2, "1"), [1,2,2]);

assertDeepEq([1,1,1].fill(2, "-2"), [1,2,2]);

assertDeepEq([1,1,1].fill(2, "-2", "-1"), [1,2,1]);

assertDeepEq([1,1,1].fill(2, {valueOf: ()=>1}), [1,2,2]);

assertDeepEq([1,1,1].fill(2, 0, {valueOf: ()=>1}), [2,1,1]);

// fill works generically for objects, too.

assertDeepEq([].fill.call({length: 2}, 2), {0: 2, 1: 2, length: 2});

var setterCalled = false;

var objWithSetter = {set "0"(val) { setterCalled = true}, length: 1};

[].fill.call(objWithSetter, 2);

assertEq(setterCalled, true);

var setHandlerCallCount = 0;

var proxy = new Proxy({length: 3}, {set(t, i, v, r) { setHandlerCallCount++; return true; }});

[].fill.call(proxy, 2);

assertEq(setHandlerCallCount, 3);

var valueOfCallCount = 0;

var typedArray = new Uint8ClampedArray(3);

[].fill.call(typedArray, {valueOf: function() {valueOfCallCount++; return 2000;}});

assertEq(valueOfCallCount, 3);

assertEq(typedArray[0], 0xff);

// All remaining cases should throw.

var objWithGetterOnly = {get "0"() {return 1;}, length: 1};

var objWithReadOnlyProp = {length: 1};

Object.defineProperty(objWithReadOnlyProp, 0, {value: 1, writable: false});

var objWithNonconfigurableProp = {length: 1};

Object.defineProperty(objWithNonconfigurableProp, 0, {value: 1, configurable: false});

var frozenObj = {length: 1};

Object.freeze(frozenObj);

var frozenArray = [1, 1, 1];

Object.freeze(frozenArray);

assertThrowsInstanceOf(() => [].fill.call(objWithGetterOnly, 2), TypeError);

assertThrowsInstanceOf(() => [].fill.call(objWithReadOnlyProp, 2), TypeError);

assertThrowsInstanceOf(() => [].fill.call(objWithNonconfigurableProp, 2), TypeError);

assertThrowsInstanceOf(() => [].fill.call(frozenObj, 2), TypeError);

assertThrowsInstanceOf(() => [].fill.call(frozenArray, 2), TypeError);

assertThrowsInstanceOf(() => [].fill.call("111", 2), TypeError);

assertThrowsInstanceOf(() => [].fill.call(null, 2), TypeError);

assertThrowsInstanceOf(() => [].fill.call(undefined, 2), TypeError);

if (typeof reportCompare === "function")

  reportCompare(true, true);