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LibJS: Add ErrorTypes for Promise ownKeys trap invariant violations

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This commit is contained in:
Linus Groh 2021-10-20 17:57:01 +01:00
parent ca09f20dcf
commit cf109533de
3 changed files with 65 additions and 3 deletions
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56
Userland/Libraries/LibJS/Tests/builtins/Proxy/Proxy.handler-ownKeys.js Normal file
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@ -0,0 +1,56 @@
// TODO: Add "[[OwnPropertyKeys]] trap normal behavior" tests
describe("[[OwnPropertyKeys]] invariants", () => {
// TODO: Add tests for other [[OwnPropertyKeys]] trap invariants
test("cannot report new property of non-extensible object", () => {
const target = Object.preventExtensions({});
const handler = {
ownKeys() {
return ["foo", "bar", "baz"];
},
};
const proxy = new Proxy(target, handler);
expect(() => {
Reflect.ownKeys(proxy);
}).toThrowWithMessage(
TypeError,
"Proxy handler's ownKeys trap violates invariant: cannot report new property 'foo' of non-extensible object"
);
});
test("cannot skip property of non-extensible object", () => {
const target = Object.preventExtensions({ foo: null });
const handler = {
ownKeys() {
return ["bar", "baz"];
},
};
const proxy = new Proxy(target, handler);
expect(() => {
Reflect.ownKeys(proxy);
}).toThrowWithMessage(
TypeError,
"Proxy handler's ownKeys trap violates invariant: cannot skip property 'foo' of non-extensible object"
);
});
test("cannot skip non-configurable property", () => {
const target = Object.defineProperty({}, "foo", { configurable: false });
const handler = {
ownKeys() {
return ["bar", "baz"];
},
};
const proxy = new Proxy(target, handler);
expect(() => {
Reflect.ownKeys(proxy);
}).toThrowWithMessage(
TypeError,
"Proxy handler's ownKeys trap violates invariant: cannot skip non-configurable property 'foo'"
);
});
});