31 lines
654 B
JavaScript
31 lines
654 B
JavaScript
class Tripler {
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static triple(n=1) {
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return n * 3;
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}
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static toString() {
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return '3' + super.toString() + '3';
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}
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}
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class MegaTripler extends Tripler {
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static triple(n=1) {
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return super.triple(n) * super.triple(n);
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}
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}
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var tripler = new Tripler();
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expect(Tripler.triple()).toBe(3);
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expect(Tripler.triple(2)).toBe(6);
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expect(tripler.triple).toBeUndefined();
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expect(Tripler.toString()).toBe('3' + Object.toString.call(Tripler) + '3');
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var mega = new MegaTripler();
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expect(MegaTripler.triple(2)).toBe(36);
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expect(mega.triple).toBeUndefined();
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expect(MegaTripler.toString()).toBe('3' + Object.toString.call(MegaTripler) + '3');
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