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Add [[GetPrototypeOf]] tests

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Alexey Shvayka 2020-03-11 04:51:01 +02:00 committed by Rick Waldron
parent b9377e7b6d
commit 20c2ce30f3
3 changed files with 86 additions and 0 deletions
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36
test/built-ins/Proxy/getPrototypeOf/trap-is-missing-target-is-proxy.js Normal file
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// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-proxy-object-internal-methods-and-internal-slots-getprototypeof
description: >
If "getPrototypeOf" trap is null or undefined, [[GetPrototypeOf]] call
is properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
info: |
[[GetPrototypeOf]] ( )
[...]
4. Let target be O.[[ProxyTarget]].
5. Let trap be ? GetMethod(handler, "getPrototypeOf").
6. If trap is undefined, then
a. Return ? target.[[GetPrototypeOf]]()
[[GetPrototypeOf]] ( )
[...]
7. Let handlerProto be ? Call(trap, handler, « target »).
[...]
13. Return handlerProto.
features: [Proxy]
---*/
var targetPrototype = {};
var target = new Proxy({}, {
getPrototypeOf: function(_target) {
return targetPrototype;
},
});
var proxy = new Proxy(target, {});
assert.sameValue(Object.getPrototypeOf(proxy), targetPrototype);

25
test/built-ins/Proxy/getPrototypeOf/trap-is-null-target-is-proxy.js Normal file
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// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-proxy-object-internal-methods-and-internal-slots-getprototypeof
description: >
If "getPrototypeOf" trap is null or undefined, [[GetPrototypeOf]] call
is properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
info: |
[[GetPrototypeOf]] ( )
[...]
4. Let target be O.[[ProxyTarget]].
5. Let trap be ? GetMethod(handler, "getPrototypeOf").
6. If trap is undefined, then
a. Return ? target.[[GetPrototypeOf]]()
features: [Proxy]
---*/
var plainObjectTarget = new Proxy(Object.create(null), {});
var plainObjectProxy = new Proxy(plainObjectTarget, {
getPrototypeOf: null,
});
assert.sameValue(Object.getPrototypeOf(plainObjectProxy), null);

25
test/built-ins/Proxy/getPrototypeOf/trap-is-undefined-target-is-proxy.js Normal file
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// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-proxy-object-internal-methods-and-internal-slots-getprototypeof
description: >
If "getPrototypeOf" trap is null or undefined, [[GetPrototypeOf]] call
is properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
info: |
[[GetPrototypeOf]] ( )
[...]
4. Let target be O.[[ProxyTarget]].
5. Let trap be ? GetMethod(handler, "getPrototypeOf").
6. If trap is undefined, then
a. Return ? target.[[GetPrototypeOf]]()
features: [Proxy]
---*/
var arrayTarget = new Proxy([], {});
var arrayProxy = new Proxy(arrayTarget, {
getPrototypeOf: undefined,
});
assert.sameValue(Object.getPrototypeOf(arrayProxy), Array.prototype);