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| 1 // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 // Flags: --harmony-rest-parameters --harmony-arrow-functions |
| 6 |
| 7 (function testRestIndex() { |
| 8 assertEquals(5, ((...args) => args.length)(1,2,3,4,5)); |
| 9 assertEquals(4, ((a, ...args) => args.length)(1,2,3,4,5)); |
| 10 assertEquals(3, ((a, b, ...args) => args.length)(1,2,3,4,5)); |
| 11 assertEquals(2, ((a, b, c, ...args) => args.length)(1,2,3,4,5)); |
| 12 assertEquals(1, ((a, b, c, d, ...args) => args.length)(1,2,3,4,5)); |
| 13 assertEquals(0, ((a, b, c, d, e, ...args) => args.length)(1,2,3,4,5)); |
| 14 })(); |
| 15 |
| 16 // strictTest and sloppyTest should be called with descending natural |
| 17 // numbers, as in: |
| 18 // |
| 19 // strictTest(6,5,4,3,2,1) |
| 20 // |
| 21 var strictTest = (a, b, ...c) => { |
| 22 "use strict"; |
| 23 assertEquals(Array, c.constructor); |
| 24 assertTrue(Array.isArray(c)); |
| 25 |
| 26 var expectedLength = (a === undefined) ? 0 : a - 2; |
| 27 assertEquals(expectedLength, c.length); |
| 28 |
| 29 for (var i = 2; i < a; ++i) { |
| 30 assertEquals(c[i - 2], a - i); |
| 31 } |
| 32 } |
| 33 |
| 34 var sloppyTest = (a, b, ...c) => { |
| 35 assertEquals(Array, c.constructor); |
| 36 assertTrue(Array.isArray(c)); |
| 37 |
| 38 var expectedLength = (a === undefined) ? 0 : a - 2; |
| 39 assertEquals(expectedLength, c.length); |
| 40 |
| 41 for (var i = 2; i < a; ++i) { |
| 42 assertEquals(c[i - 2], a - i); |
| 43 } |
| 44 } |
| 45 |
| 46 |
| 47 var O = { |
| 48 strict: strictTest, |
| 49 sloppy: sloppyTest |
| 50 }; |
| 51 |
| 52 (function testStrictRestParamArity() { |
| 53 assertEquals(2, strictTest.length); |
| 54 assertEquals(2, O.strict.length); |
| 55 })(); |
| 56 |
| 57 |
| 58 (function testRestParamsStrictMode() { |
| 59 strictTest(); |
| 60 strictTest(2, 1); |
| 61 strictTest(6, 5, 4, 3, 2, 1); |
| 62 strictTest(3, 2, 1); |
| 63 O.strict(); |
| 64 O.strict(2, 1); |
| 65 O.strict(6, 5, 4, 3, 2, 1); |
| 66 O.strict(3, 2, 1); |
| 67 })(); |
| 68 |
| 69 |
| 70 (function testRestParamsStrictModeApply() { |
| 71 strictTest.apply(null, []); |
| 72 strictTest.apply(null, [2, 1]); |
| 73 strictTest.apply(null, [6, 5, 4, 3, 2, 1]); |
| 74 strictTest.apply(null, [3, 2, 1]); |
| 75 O.strict.apply(O, []); |
| 76 O.strict.apply(O, [2, 1]); |
| 77 O.strict.apply(O, [6, 5, 4, 3, 2, 1]); |
| 78 O.strict.apply(O, [3, 2, 1]); |
| 79 })(); |
| 80 |
| 81 |
| 82 (function testRestParamsStrictModeCall() { |
| 83 strictTest.call(null); |
| 84 strictTest.call(null, 2, 1); |
| 85 strictTest.call(null, 6, 5, 4, 3, 2, 1); |
| 86 strictTest.call(null, 3, 2, 1); |
| 87 O.strict.call(O); |
| 88 O.strict.call(O, 2, 1); |
| 89 O.strict.call(O, 6, 5, 4, 3, 2, 1); |
| 90 O.strict.call(O, 3, 2, 1); |
| 91 })(); |
| 92 |
| 93 |
| 94 (function testsloppyRestParamArity() { |
| 95 assertEquals(2, sloppyTest.length); |
| 96 assertEquals(2, O.sloppy.length); |
| 97 })(); |
| 98 |
| 99 |
| 100 (function testRestParamssloppyMode() { |
| 101 sloppyTest(); |
| 102 sloppyTest(2, 1); |
| 103 sloppyTest(6, 5, 4, 3, 2, 1); |
| 104 sloppyTest(3, 2, 1); |
| 105 O.sloppy(); |
| 106 O.sloppy(2, 1); |
| 107 O.sloppy(6, 5, 4, 3, 2, 1); |
| 108 O.sloppy(3, 2, 1); |
| 109 })(); |
| 110 |
| 111 |
| 112 (function testRestParamssloppyModeApply() { |
| 113 sloppyTest.apply(null, []); |
| 114 sloppyTest.apply(null, [2, 1]); |
| 115 sloppyTest.apply(null, [6, 5, 4, 3, 2, 1]); |
| 116 sloppyTest.apply(null, [3, 2, 1]); |
| 117 O.sloppy.apply(O, []); |
| 118 O.sloppy.apply(O, [2, 1]); |
| 119 O.sloppy.apply(O, [6, 5, 4, 3, 2, 1]); |
| 120 O.sloppy.apply(O, [3, 2, 1]); |
| 121 })(); |
| 122 |
| 123 |
| 124 (function testRestParamssloppyModeCall() { |
| 125 sloppyTest.call(null); |
| 126 sloppyTest.call(null, 2, 1); |
| 127 sloppyTest.call(null, 6, 5, 4, 3, 2, 1); |
| 128 sloppyTest.call(null, 3, 2, 1); |
| 129 O.sloppy.call(O); |
| 130 O.sloppy.call(O, 2, 1); |
| 131 O.sloppy.call(O, 6, 5, 4, 3, 2, 1); |
| 132 O.sloppy.call(O, 3, 2, 1); |
| 133 })(); |
| 134 |
| 135 |
| 136 (function testUnmappedArguments() { |
| 137 // Normal functions make their arguments object unmapped, but arrow |
| 138 // functions don't have an arguments object anyway. Check that the |
| 139 // right thing happens for arguments in arrow functions with rest |
| 140 // parameters. |
| 141 assertSame(arguments, ((...rest) => arguments)()); |
| 142 })(); |
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