39ad42defd
Includes all traps except the following: [[Call]], [[Construct]], [[OwnPropertyKeys]]. An important implication of this commit is that any call to any virtual Object method has the potential to throw an exception. These methods were not checked in this commit -- a future commit will have to protect these various method calls throughout the codebase.
56 lines
1.3 KiB
JavaScript
56 lines
1.3 KiB
JavaScript
load("test-common.js");
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try {
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assert(delete (new Proxy({}, { deleteProperty: undefined })).foo === true);
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assert(delete (new Proxy({}, { deleteProperty: null })).foo === true);
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assert(delete (new Proxy({}, {})).foo === true);
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let o = {};
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let p = new Proxy(o, {
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deleteProperty(target, property) {
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assert(target === o);
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assert(property === "foo");
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return true;
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}
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});
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delete p.foo;
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o = { foo: 1, bar: 2 };
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p = new Proxy(o, {
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deleteProperty(target, property) {
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if (property === "foo") {
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delete target[property];
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return true;
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}
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return false;
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}
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});
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assert(delete p.foo === true);
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assert(delete p.bar === false);
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assert(o.foo === undefined);
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assert(o.bar === 2);
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// Invariants
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o = {};
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Object.defineProperty(o, "foo", { configurable: false });
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p = new Proxy(o, {
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deleteProperty() {
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return true;
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},
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});
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assertThrowsError(() => {
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delete p.foo;
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}, {
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error: TypeError,
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message: "Proxy handler's delete trap violates invariant: cannot report a non-configurable own property of the target as deleted",
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});
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console.log("PASS");
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} catch (e) {
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console.log("FAIL: " + e);
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}
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