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32 lines
872 B
JavaScript
32 lines
872 B
JavaScript
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test("constructor properties", () => {
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expect(Set).toHaveLength(0);
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expect(Set.name).toBe("Set");
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});
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describe("errors", () => {
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test("invalid array iterators", () => {
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[-100, Infinity, NaN, {}, 152n].forEach(value => {
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expect(() => {
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new Set(value);
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}).toThrowWithMessage(TypeError, "is not iterable");
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});
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});
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test("called without new", () => {
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expect(() => {
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Set();
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}).toThrowWithMessage(TypeError, "Set constructor must be called with 'new'");
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});
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});
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describe("normal behavior", () => {
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test("typeof", () => {
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expect(typeof new Set()).toBe("object");
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});
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test("constructor with single array argument", () => {
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var a = new Set([0, 1, 2]);
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expect(a instanceof Set).toBeTrue();
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expect(a).toHaveSize(3);
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});
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});
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