access.js (1901B)
1 // Copyright (C) 2014 the V8 project authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 /*--- 4 es6id: 14.5 5 description: > 6 class arguments access 7 ---*/ 8 var constructCounts = { 9 base: 0, 10 subclass: 0, 11 subclass2: 0 12 }; 13 14 class Base { 15 constructor() { 16 constructCounts.base++; 17 assert.sameValue(arguments.length, 2, "The value of `arguments.length` is `2`"); 18 assert.sameValue(arguments[0], 1, "The value of `arguments[0]` is `1`"); 19 assert.sameValue(arguments[1], 2, "The value of `arguments[1]` is `2`"); 20 } 21 } 22 23 var b = new Base(1, 2); 24 25 class Subclass extends Base { 26 constructor() { 27 constructCounts.subclass++; 28 assert.sameValue(arguments.length, 2, "The value of `arguments.length` is `2`"); 29 assert.sameValue(arguments[0], 3, "The value of `arguments[0]` is `3`"); 30 assert.sameValue(arguments[1], 4, "The value of `arguments[1]` is `4`"); 31 super(1, 2); 32 } 33 } 34 35 var s = new Subclass(3, 4); 36 assert.sameValue(Subclass.length, 0, "The value of `Subclass.length` is `0`, because there are 0 formal parameters"); 37 38 class Subclass2 extends Base { 39 constructor(x, y) { 40 constructCounts.subclass2++; 41 assert.sameValue(arguments.length, 2, "The value of `arguments.length` is `2`"); 42 assert.sameValue(arguments[0], 3, "The value of `arguments[0]` is `3`"); 43 assert.sameValue(arguments[1], 4, "The value of `arguments[1]` is `4`"); 44 super(1, 2); 45 } 46 } 47 48 var s2 = new Subclass2(3, 4); 49 assert.sameValue(Subclass2.length, 2, "The value of `Subclass2.length` is `2`, because there are 2 formal parameters"); 50 51 52 assert.sameValue(constructCounts.base, 3, "The value of `constructCounts.base` is `3`"); 53 assert.sameValue(constructCounts.subclass, 1, "The value of `constructCounts.subclass` is `1`"); 54 assert.sameValue(constructCounts.subclass2, 1, "The value of `constructCounts.subclass2` is `1`"); 55 56 reportCompare(0, 0);