102 lines
3.2 KiB
JavaScript
102 lines
3.2 KiB
JavaScript
test("length is 3", () => {
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expect(Reflect.set).toHaveLength(3);
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});
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describe("errors", () => {
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test("target must be an object", () => {
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[null, undefined, "foo", 123, NaN, Infinity].forEach(value => {
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expect(() => {
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Reflect.set(value);
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}).toThrowWithMessage(TypeError, "First argument of Reflect.set() must be an object");
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});
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});
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});
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describe("normal behavior", () => {
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test("setting properties of regular object", () => {
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var o = {};
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expect(Reflect.set(o)).toBeTrue();
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expect(o.undefined).toBeUndefined();
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expect(Reflect.set(o, "foo")).toBeTrue();
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expect(o.foo).toBeUndefined();
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expect(Reflect.set(o, "foo", "bar")).toBeTrue();
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expect(o.foo).toBe("bar");
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expect(Reflect.set(o, "foo", 42)).toBeTrue();
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expect(o.foo).toBe(42);
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});
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test("setting configurable, non-writable property of regular object", () => {
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var o = {};
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Object.defineProperty(o, "foo", { value: 1, configurable: true, writable: false });
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expect(Reflect.set(o, "foo", 2)).toBeFalse();
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expect(o.foo).toBe(1);
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});
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test("setting non-configurable, writable property of regular object", () => {
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var o = {};
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Object.defineProperty(o, "foo", { value: 1, configurable: false, writable: true });
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expect(Reflect.set(o, "foo", 2)).toBeTrue();
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expect(o.foo).toBe(2);
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});
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test("", () => {
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var a = [];
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expect(a.length === 0);
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expect(Reflect.set(a, "0")).toBeTrue();
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expect(a.length === 1);
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expect(a[0]).toBeUndefined();
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expect(Reflect.set(a, 1, "foo")).toBeTrue();
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expect(a.length === 2);
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expect(a[0]).toBeUndefined();
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expect(a[1] === "foo");
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expect(Reflect.set(a, 4, "bar")).toBeTrue();
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expect(a.length === 5);
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expect(a[0]).toBeUndefined();
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expect(a[1] === "foo");
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expect(a[2]).toBeUndefined();
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expect(a[3]).toBeUndefined();
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expect(a[4] === "bar");
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});
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test("setting setter property of regular object", () => {
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const foo = {
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set prop(value) {
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this.setPropCalled = true;
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},
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};
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expect(foo.setPropCalled).toBeUndefined();
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Reflect.set(foo, "prop", 42);
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expect(foo.setPropCalled).toBeTrue();
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});
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test("setting setter property of regular object with different receiver", () => {
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const foo = {
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set prop(value) {
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this.setPropCalled = true;
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},
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};
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const bar = {};
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Object.setPrototypeOf(bar, foo);
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expect(foo.setPropCalled).toBeUndefined();
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expect(bar.setPropCalled).toBeUndefined();
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Reflect.set(bar, "prop", 42);
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expect(foo.setPropCalled).toBeUndefined();
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expect(bar.setPropCalled).toBeTrue();
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Reflect.set(bar, "prop", 42, foo);
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expect(foo.setPropCalled).toBeTrue();
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expect(bar.setPropCalled).toBeTrue();
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});
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test("native setter function", () => {
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const e = new Error();
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Reflect.set(Error.prototype, "name", "Foo", e);
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expect(e.name).toBe("Foo");
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});
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});
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