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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 | |
rossberg
2015/06/10 13:43:53
Maybe add a few representative tests of syntax err
| |
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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