mirror of
https://github.com/RGBCube/serenity
synced 2025-10-26 04:22:07 +00:00
abc7b31079
The new default return_type argument is GetOwnPropertyReturnType::All, which returns properties with both string and symbol keys (which is also the default for [[OwnPropertyKeys]]). This means that in some cases we need to iterate the ordered property table twice, as we don't store string and symbol properties separately but symbols must - there's certainly room for (performance) improvements here. On the other hand this makes Reflect.ownKeys() return symbol properties now :^)
53 lines
1.9 KiB
JavaScript
53 lines
1.9 KiB
JavaScript
test("length is 1", () => {
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expect(Reflect.ownKeys).toHaveLength(1);
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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.ownKeys(value);
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}).toThrowWithMessage(
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TypeError,
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"First argument of Reflect.ownKeys() must be an object"
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);
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});
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});
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});
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describe("normal behavior", () => {
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test("regular empty object has no own keys", () => {
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var objectOwnKeys = Reflect.ownKeys({});
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expect(objectOwnKeys instanceof Array).toBeTrue();
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expect(objectOwnKeys).toHaveLength(0);
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});
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test("regular object with some properties has own keys", () => {
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var symbol = Symbol("symbol");
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var objectOwnKeys = Reflect.ownKeys({ foo: "bar", [symbol]: "qux", bar: "baz", 0: 42 });
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expect(objectOwnKeys instanceof Array).toBeTrue();
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expect(objectOwnKeys).toHaveLength(4);
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expect(objectOwnKeys[0]).toBe("0");
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expect(objectOwnKeys[1]).toBe("foo");
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expect(objectOwnKeys[2]).toBe("bar");
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expect(objectOwnKeys[3]).toBe(symbol);
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});
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test("empty array has only 'length' own key", () => {
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var arrayOwnKeys = Reflect.ownKeys([]);
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expect(arrayOwnKeys instanceof Array).toBeTrue();
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expect(arrayOwnKeys).toHaveLength(1);
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expect(arrayOwnKeys[0]).toBe("length");
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});
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test("array with some values has 'length' and indices own keys", () => {
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var arrayOwnKeys = Reflect.ownKeys(["foo", [], 123, undefined]);
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expect(arrayOwnKeys instanceof Array).toBeTrue();
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expect(arrayOwnKeys).toHaveLength(5);
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expect(arrayOwnKeys[0]).toBe("0");
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expect(arrayOwnKeys[1]).toBe("1");
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expect(arrayOwnKeys[2]).toBe("2");
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expect(arrayOwnKeys[3]).toBe("3");
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expect(arrayOwnKeys[4]).toBe("length");
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});
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});
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