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LibJS: Add Proxy objects

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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.
This commit is contained in:
Matthew Olsson 2020-06-03 14:34:52 -07:00 • committed by Andreas Kling
parent 58a72e9b81
commit 39ad42defd
29 changed files with 1697 additions and 54 deletions
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8
Libraries/LibJS/Tests/Object.preventExtensions.js
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@ -23,7 +23,13 @@ try {
o.baz = "baz";
assert(o.baz === undefined);
Object.defineProperty(o, "baz", { value: "baz" });
assertThrowsError(() => {
Object.defineProperty(o, "baz", { value: "baz" });
}, {
error: TypeError,
message: "Unable to define property on non-extensible object",
});
assert(o.baz === undefined);
assertThrowsError(() => {