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17 lines
536 B
JavaScript
17 lines
536 B
JavaScript
test("basic functionality", () => {
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expect(Math.cos).toHaveLength(1);
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expect(Math.cos(0)).toBe(1);
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expect(Math.cos(null)).toBe(1);
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expect(Math.cos("")).toBe(1);
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expect(Math.cos([])).toBe(1);
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expect(Math.cos(Math.PI)).toBe(-1);
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expect(Math.cos()).toBeNaN();
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expect(Math.cos(undefined)).toBeNaN();
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expect(Math.cos([1, 2, 3])).toBeNaN();
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expect(Math.cos({})).toBeNaN();
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expect(Math.cos("foo")).toBeNaN();
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expect(Math.cos(-Infinity)).toBeNaN();
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expect(Math.cos(Infinity)).toBeNaN();
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});
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