| function shouldBe(actual, expected) { |
| if (actual !== expected) |
| throw new Error('bad value: ' + actual); |
| } |
| |
| class DerivedArray extends Array { |
| get 2() { |
| this.called = true; |
| return 42; |
| } |
| } |
| |
| { |
| let array = []; |
| array.__proto__ = DerivedArray.prototype; |
| array.length = 42; |
| shouldBe(array.indexOf(42), 2); |
| shouldBe(array.called, true); |
| } |
| { |
| let array = [20, 20]; |
| array.__proto__ = DerivedArray.prototype; |
| array.length = 42; |
| shouldBe(array.indexOf(42), 2); |
| shouldBe(array.called, true); |
| } |
| { |
| let array = ["Hello"]; |
| array.__proto__ = DerivedArray.prototype; |
| array.length = 42; |
| shouldBe(array.indexOf(42), 2); |
| shouldBe(array.called, true); |
| } |
| { |
| let array = [42.195]; |
| array.__proto__ = DerivedArray.prototype; |
| array.length = 42; |
| shouldBe(array.indexOf(42), 2); |
| shouldBe(array.called, true); |
| } |
| { |
| let array = ["Hello"]; |
| array.__proto__ = DerivedArray.prototype; |
| array.length = 42; |
| ensureArrayStorage(array); |
| shouldBe(array.indexOf(42), 2); |
| shouldBe(array.called, true); |
| } |