mirror of
https://github.com/tc39/test262.git
synced 2025-11-03 21:24:30 +01:00
652e35bd32
Assert the behavior of the built-in method on the FunctionPrototype and the usage of the Symbol by the `instanceof` operator.
45 lines
1.4 KiB
JavaScript
45 lines
1.4 KiB
JavaScript
// Copyright (C) Copyright 2015 the V8 project authors. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
|
|
/*---
|
|
es6id: 12.9.4
|
|
description: >
|
|
Type coercion of value returned by constructor's @@hasInstance property
|
|
info: >
|
|
1. If Type(C) is not Object, throw a TypeError exception.
|
|
2. Let instOfHandler be GetMethod(C,@@hasInstance).
|
|
3. ReturnIfAbrupt(instOfHandler).
|
|
4. If instOfHandler is not undefined, then
|
|
a. Return ToBoolean(Call(instOfHandler, C, «O»)).
|
|
features: [Symbol, Symbol.hasInstance]
|
|
---*/
|
|
|
|
var F = {};
|
|
|
|
F[Symbol.hasInstance] = function() { return undefined; };
|
|
assert.sameValue(0 instanceof F, false);
|
|
|
|
F[Symbol.hasInstance] = function() { return null; };
|
|
assert.sameValue(0 instanceof F, false);
|
|
|
|
F[Symbol.hasInstance] = function() { return true; };
|
|
assert.sameValue(0 instanceof F, true);
|
|
|
|
F[Symbol.hasInstance] = function() { return NaN; };
|
|
assert.sameValue(0 instanceof F, false);
|
|
|
|
F[Symbol.hasInstance] = function() { return 1; };
|
|
assert.sameValue(0 instanceof F, true);
|
|
|
|
F[Symbol.hasInstance] = function() { return ''; };
|
|
assert.sameValue(0 instanceof F, false);
|
|
|
|
F[Symbol.hasInstance] = function() { return 'string'; };
|
|
assert.sameValue(0 instanceof F, true);
|
|
|
|
F[Symbol.hasInstance] = function() { return Symbol(); };
|
|
assert.sameValue(0 instanceof F, true);
|
|
|
|
F[Symbol.hasInstance] = function() { return {}; };
|
|
assert.sameValue(0 instanceof F, true);
|