5ceb4feca3
It shipped in Chrome 47. Review URL: https://codereview.chromium.org/1519073004 Cr-Commit-Position: refs/heads/master@{#32816}
143 lines
3.6 KiB
JavaScript
143 lines
3.6 KiB
JavaScript
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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(function testRestIndex() {
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assertEquals(5, ((...args) => args.length)(1,2,3,4,5));
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assertEquals(4, ((a, ...args) => args.length)(1,2,3,4,5));
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assertEquals(3, ((a, b, ...args) => args.length)(1,2,3,4,5));
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assertEquals(2, ((a, b, c, ...args) => args.length)(1,2,3,4,5));
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assertEquals(1, ((a, b, c, d, ...args) => args.length)(1,2,3,4,5));
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assertEquals(0, ((a, b, c, d, e, ...args) => args.length)(1,2,3,4,5));
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})();
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// strictTest and sloppyTest should be called with descending natural
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// numbers, as in:
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//
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// strictTest(6,5,4,3,2,1)
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//
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var strictTest = (() => {
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"use strict";
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return (a, b, ...c) => {
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assertEquals(Array, c.constructor);
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assertTrue(Array.isArray(c));
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var expectedLength = (a === undefined) ? 0 : a - 2;
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assertEquals(expectedLength, c.length);
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for (var i = 2; i < a; ++i) {
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assertEquals(c[i - 2], a - i);
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}
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};
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})();
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var sloppyTest = (a, b, ...c) => {
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assertEquals(Array, c.constructor);
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assertTrue(Array.isArray(c));
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var expectedLength = (a === undefined) ? 0 : a - 2;
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assertEquals(expectedLength, c.length);
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for (var i = 2; i < a; ++i) {
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assertEquals(c[i - 2], a - i);
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}
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}
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var O = {
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strict: strictTest,
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sloppy: sloppyTest
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};
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(function testStrictRestParamArity() {
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assertEquals(2, strictTest.length);
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assertEquals(2, O.strict.length);
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})();
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(function testRestParamsStrictMode() {
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strictTest();
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strictTest(2, 1);
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strictTest(6, 5, 4, 3, 2, 1);
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strictTest(3, 2, 1);
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O.strict();
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O.strict(2, 1);
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O.strict(6, 5, 4, 3, 2, 1);
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O.strict(3, 2, 1);
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})();
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(function testRestParamsStrictModeApply() {
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strictTest.apply(null, []);
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strictTest.apply(null, [2, 1]);
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strictTest.apply(null, [6, 5, 4, 3, 2, 1]);
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strictTest.apply(null, [3, 2, 1]);
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O.strict.apply(O, []);
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O.strict.apply(O, [2, 1]);
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O.strict.apply(O, [6, 5, 4, 3, 2, 1]);
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O.strict.apply(O, [3, 2, 1]);
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})();
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(function testRestParamsStrictModeCall() {
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strictTest.call(null);
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strictTest.call(null, 2, 1);
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strictTest.call(null, 6, 5, 4, 3, 2, 1);
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strictTest.call(null, 3, 2, 1);
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O.strict.call(O);
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O.strict.call(O, 2, 1);
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O.strict.call(O, 6, 5, 4, 3, 2, 1);
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O.strict.call(O, 3, 2, 1);
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})();
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(function testsloppyRestParamArity() {
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assertEquals(2, sloppyTest.length);
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assertEquals(2, O.sloppy.length);
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})();
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(function testRestParamssloppyMode() {
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sloppyTest();
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sloppyTest(2, 1);
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sloppyTest(6, 5, 4, 3, 2, 1);
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sloppyTest(3, 2, 1);
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O.sloppy();
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O.sloppy(2, 1);
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O.sloppy(6, 5, 4, 3, 2, 1);
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O.sloppy(3, 2, 1);
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})();
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(function testRestParamssloppyModeApply() {
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sloppyTest.apply(null, []);
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sloppyTest.apply(null, [2, 1]);
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sloppyTest.apply(null, [6, 5, 4, 3, 2, 1]);
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sloppyTest.apply(null, [3, 2, 1]);
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O.sloppy.apply(O, []);
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O.sloppy.apply(O, [2, 1]);
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O.sloppy.apply(O, [6, 5, 4, 3, 2, 1]);
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O.sloppy.apply(O, [3, 2, 1]);
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})();
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(function testRestParamssloppyModeCall() {
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sloppyTest.call(null);
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sloppyTest.call(null, 2, 1);
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sloppyTest.call(null, 6, 5, 4, 3, 2, 1);
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sloppyTest.call(null, 3, 2, 1);
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O.sloppy.call(O);
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O.sloppy.call(O, 2, 1);
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O.sloppy.call(O, 6, 5, 4, 3, 2, 1);
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O.sloppy.call(O, 3, 2, 1);
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})();
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(function testUnmappedArguments() {
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// Normal functions make their arguments object unmapped, but arrow
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// functions don't have an arguments object anyway. Check that the
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// right thing happens for arguments in arrow functions with rest
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// parameters.
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assertSame(arguments, ((...rest) => arguments)());
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})();
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