michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = 885553;
michael@0: var summary = 'Array.prototype.find and Array.prototype.findIndex';
michael@0: 
michael@0: print(BUGNUMBER + ": " + summary);
michael@0: 
michael@0: /**************
michael@0:  * BEGIN TEST *
michael@0:  **************/
michael@0: 
michael@0: function isString(v, index, array)
michael@0: {
michael@0:   assertEq(array[index], v);
michael@0:   return typeof v == 'string';
michael@0: }
michael@0: 
michael@0: function dumpError(e)
michael@0: {
michael@0:   var s = e.name + ': ' + e.message +
michael@0:     ' File: ' + e.fileName +
michael@0:     ', Line: ' + e.lineNumber +
michael@0:     ', Stack: ' + e.stack;
michael@0:   return s;
michael@0: }
michael@0: 
michael@0: var expect;
michael@0: var actual;
michael@0: var obj;
michael@0: 
michael@0: var strings = ['hello', 'Array', 'WORLD'];
michael@0: var mixed   = [0, '1', 2];
michael@0: var sparsestrings = new Array();
michael@0: sparsestrings[2] = 'sparse';
michael@0: var arraylike = {0:0, 1:'string', 2:2, length:3};
michael@0: // array for which JSObject::isIndexed() holds.
michael@0: var indexedArray = [];
michael@0: Object.defineProperty(indexedArray, 42, { get: function() { return 42; } });
michael@0: Object.defineProperty(indexedArray, 142, { get: function() { return 'string'; } });
michael@0: 
michael@0: // find and findIndex have 1 required argument
michael@0: 
michael@0: expect = 1;
michael@0: actual = Array.prototype.find.length;
michael@0: reportCompare(expect, actual, 'Array.prototype.find.length == 1');
michael@0: actual = Array.prototype.findIndex.length;
michael@0: reportCompare(expect, actual, 'Array.prototype.findIndex.length == 1');
michael@0: 
michael@0: // throw TypeError if no predicate specified
michael@0: expect = 'TypeError';
michael@0: try
michael@0: {
michael@0:   strings.find();
michael@0:   actual = 'no error';
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = e.name;
michael@0: }
michael@0: reportCompare(expect, actual, 'Array.find(undefined) throws TypeError');
michael@0: try
michael@0: {
michael@0:   strings.findIndex();
michael@0:   actual = 'no error';
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = e.name;
michael@0: }
michael@0: reportCompare(expect, actual, 'Array.findIndex(undefined) throws TypeError');
michael@0: 
michael@0: // Length gets treated as integer, not uint32
michael@0: obj = { length: -4294967295, 0: 42 };
michael@0: expected = undefined;
michael@0: actual = Array.prototype.find.call(obj, () => true);
michael@0: reportCompare(expected, actual, 'find correctly treats "length" as an integer');
michael@0: expected = -1
michael@0: actual = Array.prototype.findIndex.call(obj, () => true);
michael@0: reportCompare(expected, actual, 'findIndex correctly treats "length" as an integer');
michael@0: 
michael@0: // test find and findIndex results
michael@0: try
michael@0: {
michael@0:   expect = 'hello';
michael@0:   actual = strings.find(isString);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'strings: find finds first string element');
michael@0: 
michael@0: try
michael@0: {
michael@0:   expect = 0;
michael@0:   actual = strings.findIndex(isString);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'strings: findIndex finds first string element');
michael@0: 
michael@0: try
michael@0: {
michael@0:   expect = '1';
michael@0:   actual = mixed.find(isString);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'mixed: find finds first string element');
michael@0: 
michael@0: try
michael@0: {
michael@0:   expect = 1;
michael@0:   actual = mixed.findIndex(isString);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'mixed: findIndex finds first string element');
michael@0: 
michael@0: try
michael@0: {
michael@0:   expect = 'sparse';
michael@0:   actual = sparsestrings.find(isString);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'sparsestrings: find finds first string element');
michael@0: 
michael@0: try
michael@0: {
michael@0:   expect = 2;
michael@0:   actual = sparsestrings.findIndex(isString);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'sparsestrings: findIndex finds first string element');
michael@0: 
michael@0: try
michael@0: {
michael@0:   expect = 'string';
michael@0:   actual = [].find.call(arraylike, isString);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'arraylike: find finds first string element');
michael@0: 
michael@0: try
michael@0: {
michael@0:   expect = 1;
michael@0:   actual = [].findIndex.call(arraylike, isString);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'arraylike: findIndex finds first string element');
michael@0: 
michael@0: try
michael@0: {
michael@0:   expect = 1;
michael@0:   actual = 0;
michael@0:   Array.prototype.find.call({get 0(){ actual++ }, length: 1}, ()=>true);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'arraylike with getter: getter only called once');
michael@0: 
michael@0: try
michael@0: {
michael@0:   expect = 'string';
michael@0:   actual = [].find.call(indexedArray, isString);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'indexedArray: find finds first string element');
michael@0: 
michael@0: try
michael@0: {
michael@0:   expect = 142;
michael@0:   actual = [].findIndex.call(indexedArray, isString);
michael@0: }
michael@0: catch(e)
michael@0: {
michael@0:   actual = dumpError(e);
michael@0: }
michael@0: reportCompare(expect, actual, 'indexedArray: findIndex finds first string element');