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d87a7da6e1
While we're at it, use assert() instead of assert.sameValue() for brevity,
if we are not specifically testing that the return value of hasOwnProperty
is the value true or false; and add more informative assertion messages to
help with debugging.
In some cases, the Object.hasOwnProperty.call could be replaced with
verifyProperty(), if the property descriptor was also being verified at
the same time.
This fixes some tests that were faulty to begin with: a common mistake was
Object.hasOwnProperty(obj, prop) which is probably going to return false
when that's not what you want.
The only instances left of `Object.hasOwnProperty` are one regression test
in implementation-contributed which I can't tell if it was intentionally
needed to trigger the regression, and a few instances of
`Object.hasOwnProperty('prototype')` which would defeat the purpose to
convert into `Object.prototype.hasOwnProperty.call(Object, 'prototype')`
form.
Closes: #3524
57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-proxy-object-internal-methods-and-internal-slots-delete-p
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description: >
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If "deleteProperty" trap is null or undefined, [[Delete]] call is
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properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
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info: |
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[[Delete]] ( P )
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[...]
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5. Let target be O.[[ProxyTarget]].
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6. Let trap be ? GetMethod(handler, "deleteProperty").
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7. If trap is undefined, then
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a. Return ? target.[[Delete]](P).
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features: [Proxy, Reflect]
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---*/
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var plainObject = {
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get foo() {},
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};
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Object.defineProperty(plainObject, "bar", {
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configurable: false,
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});
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var plainObjectTarget = new Proxy(plainObject, {});
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var plainObjectProxy = new Proxy(plainObjectTarget, {});
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assert(delete plainObjectProxy.foo);
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assert(
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!Object.prototype.hasOwnProperty.call(plainObject, "foo"),
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"'foo' property was deleted from original object"
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);
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assert(!Reflect.deleteProperty(plainObjectProxy, "bar"));
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assert(
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Object.prototype.hasOwnProperty.call(plainObject, "bar"),
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"'bar' property was not deleted from original object"
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);
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var func = function() {};
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var funcTarget = new Proxy(func, {});
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var funcProxy = new Proxy(funcTarget, {});
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assert(delete funcProxy.length);
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assert(
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!Object.prototype.hasOwnProperty.call(func, "length"),
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"'length' property was deleted from original object"
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);
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assert.throws(TypeError, function() {
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"use strict";
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delete funcProxy.prototype;
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});
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