51 lines
1.6 KiB
JavaScript
51 lines
1.6 KiB
JavaScript
describe("correct behavior", () => {
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test("lengths", () => {
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expect(Object.values).toHaveLength(1);
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expect(Object.values(true)).toHaveLength(0);
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expect(Object.values(45)).toHaveLength(0);
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expect(Object.values(-998)).toHaveLength(0);
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expect(Object.values("abcd")).toHaveLength(4);
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expect(Object.values([1, 2, 3])).toHaveLength(3);
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expect(Object.values({ a: 1, b: 2, c: 3 })).toHaveLength(3);
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});
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test("object argument", () => {
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let values = Object.values({ foo: 1, bar: 2, baz: 3 });
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expect(values).toEqual([1, 2, 3]);
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});
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test("object argument with symbol keys", () => {
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let values = Object.values({ foo: 1, [Symbol("bar")]: 2, baz: 3 });
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expect(values).toEqual([1, 3]);
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});
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test("array argument", () => {
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let values = Object.values(["a", "b", "c"]);
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expect(values).toEqual(["a", "b", "c"]);
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});
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test("ignores non-enumerable properties", () => {
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let obj = { foo: 1 };
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Object.defineProperty(obj, "getFoo", {
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value: function () {
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return this.foo;
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},
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});
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let values = Object.values(obj);
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expect(values).toEqual([1]);
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});
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});
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describe("errors", () => {
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test("null argument", () => {
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expect(() => {
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Object.values(null);
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}).toThrowWithMessage(TypeError, "ToObject on null or undefined");
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});
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test("undefined argument", () => {
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expect(() => {
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Object.values(undefined);
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}).toThrowWithMessage(TypeError, "ToObject on null or undefined");
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});
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});
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