Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 28 | function props(x) { |
| 29 | var array = []; |
| 30 | for (let p in x) array.push(p); |
| 31 | return array.sort(); |
| 32 | } |
| 33 | |
| 34 | assertEquals(0, props({}).length); |
| 35 | assertEquals(1, props({x:1}).length); |
| 36 | assertEquals(2, props({x:1, y:2}).length); |
| 37 | |
| 38 | assertArrayEquals(["x"], props({x:1})); |
| 39 | assertArrayEquals(["x", "y"], props({x:1, y:2})); |
| 40 | assertArrayEquals(["x", "y", "zoom"], props({x:1, y:2, zoom:3})); |
| 41 | |
| 42 | assertEquals(0, props([]).length); |
| 43 | assertEquals(1, props([1]).length); |
| 44 | assertEquals(2, props([1,2]).length); |
| 45 | |
| 46 | assertArrayEquals(["0"], props([1])); |
| 47 | assertArrayEquals(["0", "1"], props([1,2])); |
| 48 | assertArrayEquals(["0", "1", "2"], props([1,2,3])); |
| 49 | |
| 50 | var o = {}; |
| 51 | var a = []; |
| 52 | let i = "outer_i"; |
| 53 | let s = "outer_s"; |
| 54 | for (let i = 0x0020; i < 0x01ff; i+=2) { |
| 55 | let s = 'char:' + String.fromCharCode(i); |
| 56 | a.push(s); |
| 57 | o[s] = i; |
| 58 | } |
| 59 | assertArrayEquals(a, props(o)); |
| 60 | assertEquals(i, "outer_i"); |
| 61 | assertEquals(s, "outer_s"); |
| 62 | |
| 63 | var a = []; |
| 64 | assertEquals(0, props(a).length); |
| 65 | a[Math.pow(2,30)-1] = 0; |
| 66 | assertEquals(1, props(a).length); |
| 67 | a[Math.pow(2,31)-1] = 0; |
| 68 | assertEquals(2, props(a).length); |
| 69 | a[1] = 0; |
| 70 | assertEquals(3, props(a).length); |
| 71 | |
| 72 | var result = ''; |
| 73 | for (let p in {a : [0], b : 1}) { result += p; } |
| 74 | assertEquals('ab', result); |
| 75 | |
| 76 | var result = ''; |
| 77 | for (let p in {a : {v:1}, b : 1}) { result += p; } |
| 78 | assertEquals('ab', result); |
| 79 | |
| 80 | var result = ''; |
| 81 | for (let p in { get a() {}, b : 1}) { result += p; } |
| 82 | assertEquals('ab', result); |
| 83 | |
| 84 | var result = ''; |
| 85 | for (let p in { get a() {}, set a(x) {}, b : 1}) { result += p; } |
| 86 | assertEquals('ab', result); |
| 87 | |
| 88 | |
| 89 | // Check that there is exactly one variable without initializer |
| 90 | // in a for-in statement with let variables. |
| 91 | assertThrows("function foo() { 'use strict'; for (let in {}) { } }", SyntaxError); |
| 92 | assertThrows("function foo() { 'use strict'; for (let x = 3 in {}) { } }", SyntaxError); |
| 93 | assertThrows("function foo() { 'use strict'; for (let x, y in {}) { } }", SyntaxError); |
| 94 | assertThrows("function foo() { 'use strict'; for (let x = 3, y in {}) { } }", SyntaxError); |
| 95 | assertThrows("function foo() { 'use strict'; for (let x, y = 4 in {}) { } }", SyntaxError); |
| 96 | assertThrows("function foo() { 'use strict'; for (let x = 3, y = 4 in {}) { } }", SyntaxError); |
| 97 | |
| 98 | |
| 99 | // In a normal for statement the iteration variable is |
| 100 | // freshly allocated for each iteration. |
| 101 | function closures1() { |
| 102 | let a = []; |
| 103 | for (let i = 0; i < 5; ++i) { |
| 104 | a.push(function () { return i; }); |
| 105 | } |
| 106 | for (let j = 0; j < 5; ++j) { |
| 107 | assertEquals(j, a[j]()); |
| 108 | } |
| 109 | } |
| 110 | closures1(); |
| 111 | |
| 112 | |
| 113 | function closures2() { |
| 114 | let a = [], b = []; |
| 115 | for (let i = 0, j = 10; i < 5; ++i, ++j) { |
| 116 | a.push(function () { return i; }); |
| 117 | b.push(function () { return j; }); |
| 118 | } |
| 119 | for (let k = 0; k < 5; ++k) { |
| 120 | assertEquals(k, a[k]()); |
| 121 | assertEquals(k + 10, b[k]()); |
| 122 | } |
| 123 | } |
| 124 | closures2(); |
| 125 | |
| 126 | |
| 127 | function closure_in_for_init() { |
| 128 | let a = []; |
| 129 | for (let i = 0, f = function() { return i }; i < 5; ++i) { |
| 130 | a.push(f); |
| 131 | } |
| 132 | for (let k = 0; k < 5; ++k) { |
| 133 | assertEquals(0, a[k]()); |
| 134 | } |
| 135 | } |
| 136 | closure_in_for_init(); |
| 137 | |
| 138 | |
| 139 | function closure_in_for_cond() { |
| 140 | let a = []; |
| 141 | for (let i = 0; a.push(function () { return i; }), i < 5; ++i) { } |
| 142 | for (let k = 0; k < 5; ++k) { |
| 143 | assertEquals(k, a[k]()); |
| 144 | } |
| 145 | } |
| 146 | closure_in_for_cond(); |
| 147 | |
| 148 | |
| 149 | function closure_in_for_next() { |
| 150 | let a = []; |
| 151 | for (let i = 0; i < 5; a.push(function () { return i; }), ++i) { } |
| 152 | for (let k = 0; k < 5; ++k) { |
| 153 | assertEquals(k + 1, a[k]()); |
| 154 | } |
| 155 | } |
| 156 | closure_in_for_next(); |
| 157 | |
| 158 | |
| 159 | // In a for-in statement the iteration variable is fresh |
| 160 | // for each iteration. |
| 161 | function closures3(x) { |
| 162 | let a = []; |
| 163 | for (let p in x) { |
| 164 | a.push(function () { return p; }); |
| 165 | } |
| 166 | let k = 0; |
| 167 | for (let q in x) { |
| 168 | assertEquals(q, a[k]()); |
| 169 | ++k; |
| 170 | } |
| 171 | } |
| 172 | closures3({a : [0], b : 1, c : {v : 1}, get d() {}, set e(x) {}}); |
| 173 | |
| 174 | // Check normal for statement completion values. |
| 175 | assertEquals(1, eval("for (let i = 0; i < 10; i++) { 1; }")); |
| 176 | assertEquals(9, eval("for (let i = 0; i < 10; i++) { i; }")); |
| 177 | assertEquals(undefined, eval("for (let i = 0; false;) { }")); |
| 178 | assertEquals(undefined, eval("for (const i = 0; false;) { }")); |
| 179 | assertEquals(undefined, eval("for (let i = 0; i < 10; i++) { }")); |
| 180 | assertEquals(undefined, eval("for (let i = 0; false;) { i; }")); |
| 181 | assertEquals(undefined, eval("for (const i = 0; false;) { i; }")); |
| 182 | assertEquals(undefined, eval("for (let i = 0; true;) { break; }")); |
| 183 | assertEquals(undefined, eval("for (const i = 0; true;) { break; }")); |
| 184 | assertEquals(undefined, eval("for (let i = 0; i < 10; i++) { continue; }")); |
| 185 | assertEquals(undefined, eval("for (let i = 0; true;) { break; i; }")); |
| 186 | assertEquals(undefined, eval("for (const i = 0; true;) { break; i; }")); |
| 187 | assertEquals(undefined, eval("for (let i = 0; i < 10; i++) { continue; i; }")); |
| 188 | assertEquals(0, eval("for (let i = 0; true;) { i; break; }")); |
| 189 | assertEquals(0, eval("for (const i = 0; true;) { i; break; }")); |
| 190 | assertEquals(9, eval("for (let i = 0; i < 10; i++) { i; continue; }")); |
| 191 | assertEquals( |
| 192 | undefined, eval("for (let i = 0; true; i++) { i; if (i >= 3) break; }")); |
| 193 | assertEquals( |
| 194 | undefined, eval("for (let i = 0; true; i++) { if (i >= 3) break; i; }")); |
| 195 | assertEquals( |
| 196 | undefined, eval("for (let i = 0; i < 10; i++) { if (i >= 3) continue; i; }")); |
| 197 | assertEquals(undefined, eval("foo: for (let i = 0; true;) { break foo; }")); |
| 198 | assertEquals(undefined, eval("foo: for (const i = 0; true;) { break foo; }")); |
| 199 | assertEquals(3, eval("foo: for (let i = 3; true;) { i; break foo; }")); |