77 lines
3.0 KiB
JavaScript
77 lines
3.0 KiB
JavaScript
|
// Copyright 2016 the V8 project authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
let get = () => {};
|
||
|
|
let set = () => {};
|
||
|
|
let target = {};
|
||
|
|
let handler = {
|
||
|
|
getOwnPropertyDescriptor(target, prop) {
|
||
|
|
let configurable = true;
|
||
|
|
if (prop == "both") {
|
||
|
|
return { get, set, configurable };
|
||
|
|
} else if (prop == "get") {
|
||
|
|
return { get, configurable };
|
||
|
|
} else if (prop == "set") {
|
||
|
|
return { set, configurable };
|
||
|
|
} else if (prop == "data") {
|
||
|
|
return { value: 42, configurable };
|
||
|
|
} else {
|
||
|
|
return Reflect.getOwnPropertyDescriptor(target, prop);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// Test behavior on own properties.
|
||
|
|
let proxy = new Proxy(target, handler);
|
||
|
|
assertSame(get, proxy.__lookupGetter__("both"));
|
||
|
|
assertSame(get, proxy.__lookupGetter__("get"));
|
||
|
|
assertSame(undefined, proxy.__lookupGetter__("set"));
|
||
|
|
assertSame(undefined, proxy.__lookupGetter__("data"));
|
||
|
|
assertSame(set, proxy.__lookupSetter__("both"));
|
||
|
|
assertSame(undefined, proxy.__lookupSetter__("get"));
|
||
|
|
assertSame(set, proxy.__lookupSetter__("set"));
|
||
|
|
assertSame(undefined, proxy.__lookupSetter__("data"));
|
||
|
|
|
||
|
|
// Test behavior on the prototype chain.
|
||
|
|
let object = { __proto__: proxy };
|
||
|
|
assertSame(get, object.__lookupGetter__("both"));
|
||
|
|
assertSame(get, object.__lookupGetter__("get"));
|
||
|
|
assertSame(undefined, object.__lookupGetter__("set"));
|
||
|
|
assertSame(undefined, object.__lookupGetter__("data"));
|
||
|
|
assertSame(set, object.__lookupSetter__("both"));
|
||
|
|
assertSame(undefined, object.__lookupSetter__("get"));
|
||
|
|
assertSame(set, object.__lookupSetter__("set"));
|
||
|
|
assertSame(undefined, object.__lookupSetter__("data"));
|
||
|
|
|
||
|
|
// Test being shadowed while on prototype chain.
|
||
|
|
let shadower = { __proto__: proxy, both: 1, get: 2, set: 3, data: 4 };
|
||
|
|
assertSame(undefined, shadower.__lookupGetter__("both"));
|
||
|
|
assertSame(undefined, shadower.__lookupGetter__("get"));
|
||
|
|
assertSame(undefined, shadower.__lookupGetter__("set"));
|
||
|
|
assertSame(undefined, shadower.__lookupGetter__("data"));
|
||
|
|
assertSame(undefined, shadower.__lookupSetter__("both"));
|
||
|
|
assertSame(undefined, shadower.__lookupSetter__("get"));
|
||
|
|
assertSame(undefined, shadower.__lookupSetter__("set"));
|
||
|
|
assertSame(undefined, shadower.__lookupSetter__("data"));
|
||
|
|
|
||
|
|
// Test getPrototypeOf trap.
|
||
|
|
let getFoo = () => {};
|
||
|
|
let setFoo = () => {};
|
||
|
|
let proto = {};
|
||
|
|
Reflect.defineProperty(proto, "foo", { get: getFoo, set: setFoo });
|
||
|
|
Reflect.setPrototypeOf(target, proto);
|
||
|
|
assertSame(getFoo, proxy.__lookupGetter__("foo"));
|
||
|
|
assertSame(setFoo, proxy.__lookupSetter__("foo"));
|
||
|
|
handler.getPrototypeOf = () => null;
|
||
|
|
assertSame(undefined, proxy.__lookupGetter__("foo"));
|
||
|
|
assertSame(undefined, proxy.__lookupSetter__("foo"));
|
||
|
|
handler.getPrototypeOf = () => proto;
|
||
|
|
assertSame(getFoo, proxy.__lookupGetter__("foo"));
|
||
|
|
assertSame(setFoo, proxy.__lookupSetter__("foo"));
|
||
|
|
|
||
|
|
// Test shadowing the prototype.
|
||
|
|
Reflect.defineProperty(proto, "data", { get: getFoo, set: setFoo });
|
||
|
|
assertSame(undefined, proxy.__lookupGetter__("data"));
|
||
|
|
assertSame(undefined, proxy.__lookupSetter__("data"));
|