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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Flags: --harmony-rest-parameters --harmony-arrow-functions | 5 // Flags: --harmony-rest-parameters --harmony-arrow-functions |
| 6 // Flags: --min-preparse-length=0 |
6 | 7 |
7 (function testRestIndex() { | 8 (function testRestIndex() { |
8 assertEquals(5, ((...args) => args.length)(1,2,3,4,5)); | 9 assertEquals(5, ((...args) => args.length)(1,2,3,4,5)); |
9 assertEquals(4, ((a, ...args) => args.length)(1,2,3,4,5)); | 10 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(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(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(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 assertEquals(0, ((a, b, c, d, e, ...args) => args.length)(1,2,3,4,5)); |
14 })(); | 15 })(); |
15 | 16 |
16 // strictTest and sloppyTest should be called with descending natural | 17 // strictTest and sloppyTest should be called with descending natural |
17 // numbers, as in: | 18 // numbers, as in: |
18 // | 19 // |
19 // strictTest(6,5,4,3,2,1) | 20 // strictTest(6,5,4,3,2,1) |
20 // | 21 // |
21 var strictTest = (() => { | 22 var strictTest = (function() { |
22 "use strict"; | 23 "use strict"; |
23 return (a, b, ...c) => { | 24 return (a, b, ...c) => { |
24 assertEquals(Array, c.constructor); | 25 assertEquals(Array, c.constructor); |
25 assertTrue(Array.isArray(c)); | 26 assertTrue(Array.isArray(c)); |
26 | 27 |
27 var expectedLength = (a === undefined) ? 0 : a - 2; | 28 var expectedLength = (a === undefined) ? 0 : a - 2; |
28 assertEquals(expectedLength, c.length); | 29 assertEquals(expectedLength, c.length); |
29 | 30 |
30 for (var i = 2; i < a; ++i) { | 31 for (var i = 2; i < a; ++i) { |
31 assertEquals(c[i - 2], a - i); | 32 assertEquals(c[i - 2], a - i); |
32 } | 33 } |
33 }; | 34 }; |
34 })(); | 35 })(); |
35 | 36 |
36 var sloppyTest = (a, b, ...c) => { | 37 var sloppyTest = (a, b, ...c) => { |
37 assertEquals(Array, c.constructor); | 38 assertEquals(Array, c.constructor); |
38 assertTrue(Array.isArray(c)); | 39 assertTrue(Array.isArray(c)); |
39 | 40 |
40 var expectedLength = (a === undefined) ? 0 : a - 2; | 41 var expectedLength = (a === undefined) ? 0 : a - 2; |
41 assertEquals(expectedLength, c.length); | 42 assertEquals(expectedLength, c.length); |
42 | 43 |
43 for (var i = 2; i < a; ++i) { | 44 for (var i = 2; i < a; ++i) { |
44 assertEquals(c[i - 2], a - i); | 45 assertEquals(c[i - 2], a - i); |
45 } | 46 } |
46 } | 47 }; |
47 | 48 |
48 | 49 |
49 var O = { | 50 var O = { |
50 strict: strictTest, | 51 strict: strictTest, |
51 sloppy: sloppyTest | 52 sloppy: sloppyTest |
52 }; | 53 }; |
53 | 54 |
54 (function testStrictRestParamArity() { | 55 (function testStrictRestParamArity() { |
55 assertEquals(2, strictTest.length); | 56 assertEquals(2, strictTest.length); |
56 assertEquals(2, O.strict.length); | 57 assertEquals(2, O.strict.length); |
(...skipping 35 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
92 O.strict.call(O, 3, 2, 1); | 93 O.strict.call(O, 3, 2, 1); |
93 })(); | 94 })(); |
94 | 95 |
95 | 96 |
96 (function testsloppyRestParamArity() { | 97 (function testsloppyRestParamArity() { |
97 assertEquals(2, sloppyTest.length); | 98 assertEquals(2, sloppyTest.length); |
98 assertEquals(2, O.sloppy.length); | 99 assertEquals(2, O.sloppy.length); |
99 })(); | 100 })(); |
100 | 101 |
101 | 102 |
102 (function testRestParamssloppyMode() { | 103 (function testRestParamsSloppyMode() { |
103 sloppyTest(); | 104 sloppyTest(); |
104 sloppyTest(2, 1); | 105 sloppyTest(2, 1); |
105 sloppyTest(6, 5, 4, 3, 2, 1); | 106 sloppyTest(6, 5, 4, 3, 2, 1); |
106 sloppyTest(3, 2, 1); | 107 sloppyTest(3, 2, 1); |
107 O.sloppy(); | 108 O.sloppy(); |
108 O.sloppy(2, 1); | 109 O.sloppy(2, 1); |
109 O.sloppy(6, 5, 4, 3, 2, 1); | 110 O.sloppy(6, 5, 4, 3, 2, 1); |
110 O.sloppy(3, 2, 1); | 111 O.sloppy(3, 2, 1); |
111 })(); | 112 })(); |
112 | 113 |
(...skipping 22 matching lines...) Expand all Loading... |
135 })(); | 136 })(); |
136 | 137 |
137 | 138 |
138 (function testUnmappedArguments() { | 139 (function testUnmappedArguments() { |
139 // Normal functions make their arguments object unmapped, but arrow | 140 // Normal functions make their arguments object unmapped, but arrow |
140 // functions don't have an arguments object anyway. Check that the | 141 // functions don't have an arguments object anyway. Check that the |
141 // right thing happens for arguments in arrow functions with rest | 142 // right thing happens for arguments in arrow functions with rest |
142 // parameters. | 143 // parameters. |
143 assertSame(arguments, ((...rest) => arguments)()); | 144 assertSame(arguments, ((...rest) => arguments)()); |
144 })(); | 145 })(); |
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