test("length is 3", () => {
  expect(Reflect.set).toHaveLength(3);
});

describe("errors", () => {
  test("target must be an object", () => {
    [null, undefined, "foo", 123, NaN, Infinity].forEach(value => {
      expect(() => {
        Reflect.set(value);
      }).toThrowWithMessage(TypeError, "First argument of Reflect.set() must be an object");
    });
  });
});

describe("normal behavior", () => {
  test("setting properties of regular object", () => {
    var o = {};

    expect(Reflect.set(o)).toBeTrue();
    expect(o.undefined).toBeUndefined();

    expect(Reflect.set(o, "foo")).toBeTrue();
    expect(o.foo).toBeUndefined();

    expect(Reflect.set(o, "foo", "bar")).toBeTrue();
    expect(o.foo).toBe("bar");

    expect(Reflect.set(o, "foo", 42)).toBeTrue();
    expect(o.foo).toBe(42);
  });

  test("setting configurable, non-writable property of regular object", () => {
    var o = {};
    Object.defineProperty(o, "foo", { value: 1, configurable: true, writable: false });
    expect(Reflect.set(o, "foo", 2)).toBeFalse();
    expect(o.foo).toBe(1);
  });

  test("setting non-configurable, writable property of regular object", () => {
    var o = {};
    Object.defineProperty(o, "foo", { value: 1, configurable: false, writable: true });
    expect(Reflect.set(o, "foo", 2)).toBeTrue();
    expect(o.foo).toBe(2);
  });

  test("", () => {
    var a = [];
    expect(a.length === 0);
    expect(Reflect.set(a, "0")).toBeTrue();
    expect(a.length === 1);
    expect(a[0]).toBeUndefined();
    expect(Reflect.set(a, 1, "foo")).toBeTrue();
    expect(a.length === 2);
    expect(a[0]).toBeUndefined();
    expect(a[1] === "foo");
    expect(Reflect.set(a, 4, "bar")).toBeTrue();
    expect(a.length === 5);
    expect(a[0]).toBeUndefined();
    expect(a[1] === "foo");
    expect(a[2]).toBeUndefined();
    expect(a[3]).toBeUndefined();
    expect(a[4] === "bar");
  });

  test("setting setter property of regular object", () => {
    const foo = {
      set prop(value) {
        this.setPropCalled = true;
      },
    };
    expect(foo.setPropCalled).toBeUndefined();
    Reflect.set(foo, "prop", 42);
    expect(foo.setPropCalled).toBeTrue();
  });

  test("setting setter property of regular object with different receiver", () => {
    const foo = {
      set prop(value) {
        this.setPropCalled = true;
      },
    };
    const bar = {};
    Object.setPrototypeOf(bar, foo);

    expect(foo.setPropCalled).toBeUndefined();
    expect(bar.setPropCalled).toBeUndefined();

    Reflect.set(bar, "prop", 42);
    expect(foo.setPropCalled).toBeUndefined();
    expect(bar.setPropCalled).toBeTrue();

    Reflect.set(bar, "prop", 42, foo);
    expect(foo.setPropCalled).toBeTrue();
    expect(bar.setPropCalled).toBeTrue();
  });
});