JSTests/stress/reflect-get-own-property.js

function shouldBe(actual, expected) {
    if (actual !== expected)
        throw new Error('bad value: ' + actual);
}

function shouldThrow(func, message) {
    var error = null;
    try {
        func();
    } catch (e) {
        error = e;
    }
    if (!error)
        throw new Error("not thrown.");
    if (String(error) !== message)
        throw new Error("bad error: " + String(error));
}

shouldBe(Reflect.getOwnPropertyDescriptor.length, 2);

var toPropertyKey = {
    toString() {
        throw new Error("ok");
    }
};

shouldThrow(() => {
    Reflect.getOwnPropertyDescriptor("hello", 42);
}, `TypeError: Reflect.getOwnPropertyDescriptor requires the first argument be an object`);

shouldThrow(() => {
    Reflect.getOwnPropertyDescriptor("hello", toPropertyKey);
}, `TypeError: Reflect.getOwnPropertyDescriptor requires the first argument be an object`);

shouldThrow(() => {
    Reflect.getOwnPropertyDescriptor(null, toPropertyKey);
}, `TypeError: Reflect.getOwnPropertyDescriptor requires the first argument be an object`);

shouldThrow(() => {
    Reflect.getOwnPropertyDescriptor(undefined, toPropertyKey);
}, `TypeError: Reflect.getOwnPropertyDescriptor requires the first argument be an object`);

shouldThrow(() => {
    Reflect.getOwnPropertyDescriptor({}, toPropertyKey);
}, `Error: ok`);

shouldBe(Reflect.getOwnPropertyDescriptor({ __proto__: { hello: 42 } }, "hello"), undefined);
shouldBe(JSON.stringify(Reflect.getOwnPropertyDescriptor({ hello: 42 }, "hello")), `{"value":42,"writable":true,"enumerable":true,"configurable":true}`);

(function () {
    var object = {
        get hello() {
        }
    };
    var desc = Reflect.getOwnPropertyDescriptor(object, "hello");
    shouldBe(JSON.stringify(desc), `{"enumerable":true,"configurable":true}`);
    shouldBe(desc.set, undefined);
    shouldBe(desc.get, Object.getOwnPropertyDescriptor(object, "hello").get);
}());

(function () {
    var object = {
        set hello(value) {
        }
    };
    var desc = Reflect.getOwnPropertyDescriptor(object, "hello");
    shouldBe(JSON.stringify(desc), `{"enumerable":true,"configurable":true}`);
    shouldBe(desc.set, Object.getOwnPropertyDescriptor(object, "hello").set);
    shouldBe(desc.get, undefined);
}());

(function () {
    var object = Object.defineProperty({}, "hello", {
        enumerable: false,
        value: 42
    });
    var desc = Reflect.getOwnPropertyDescriptor(object, "hello");
    shouldBe(JSON.stringify(desc), `{"value":42,"writable":false,"enumerable":false,"configurable":false}`);
}());

(function () {
    var object = Object.defineProperty({}, "hello", {
        enumerable: false,
        configurable: true,
        value: 42
    });
    var desc = Reflect.getOwnPropertyDescriptor(object, "hello");
    shouldBe(JSON.stringify(desc), `{"value":42,"writable":false,"enumerable":false,"configurable":true}`);
}());

(function () {
    var object = Object.defineProperty({}, "hello", {
        enumerable: true,
        configurable: false,
        value: 42
    });
    var desc = Reflect.getOwnPropertyDescriptor(object, "hello");
    shouldBe(JSON.stringify(desc), `{"value":42,"writable":false,"enumerable":true,"configurable":false}`);
}());

(function () {
    var object = Object.defineProperty({}, "hello", {
        enumerable: true,
        configurable: false,
        writable: false,
        value: 42
    });
    var desc = Reflect.getOwnPropertyDescriptor(object, "hello");
    shouldBe(JSON.stringify(desc), `{"value":42,"writable":false,"enumerable":true,"configurable":false}`);
}());

(function () {
    var object = Object.defineProperty({}, "hello", {
        enumerable: true,
        configurable: false,
        writable: true,
        value: 42
    });
    var desc = Reflect.getOwnPropertyDescriptor(object, "hello");
    shouldBe(JSON.stringify(desc), `{"value":42,"writable":true,"enumerable":true,"configurable":false}`);
}());

(function () {
    var object = {
        get hello() {
        },
        set hello(value) {
        }
    };
    var desc = Reflect.getOwnPropertyDescriptor(object, "hello");
    shouldBe(JSON.stringify(desc), `{"enumerable":true,"configurable":true}`);
    shouldBe(desc.get, Object.getOwnPropertyDescriptor(object, "hello").get);
    shouldBe(desc.set, Object.getOwnPropertyDescriptor(object, "hello").set);
}());

(function () {
    var object = {
        get hello() {
        },
        set hello(value) {
        }
    };
    var desc = Reflect.getOwnPropertyDescriptor(object, { toString() { return "hello"; } });
    shouldBe(JSON.stringify(desc), `{"enumerable":true,"configurable":true}`);
    shouldBe(desc.get, Object.getOwnPropertyDescriptor(object, "hello").get);
    shouldBe(desc.set, Object.getOwnPropertyDescriptor(object, "hello").set);
}());