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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// Tests for custom `instanceof` behavior via XPC_SCRIPTABLE_WANT_HASINSTANCE.
add_task(function id_instanceof() {
// ID objects are instances of Components.ID.
let id = Components.ID("{f2f5c784-7f6c-43f5-81b0-45ff32c312b1}");
Assert.equal(id instanceof Components.ID, true);
Assert.equal({} instanceof Components.ID, false);
Assert.equal(null instanceof Components.ID, false);
// Components.ID has a Symbol.hasInstance function.
let desc = Object.getOwnPropertyDescriptor(Components.ID, Symbol.hasInstance);
Assert.equal(typeof desc, "object");
Assert.equal(typeof desc.value, "function");
// Test error handling when calling this function with unexpected values.
Assert.throws(() => desc.value.call(null), /At least 1 argument required/);
Assert.throws(() => desc.value.call(null, 1), /unexpected this value/);
Assert.throws(() => desc.value.call({}, {}), /NS_ERROR_XPC_BAD_OP_ON_WN_PROTO/);
});
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