24 lines
562 B
JavaScript
24 lines
562 B
JavaScript
function B() {}
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B.b = function() {
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return 'B.b';
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};
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class C extends B {}
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expect(Object.getPrototypeOf(C)).toBe(B);
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expect(Object.getPrototypeOf(C.prototype)).toBe(B.prototype);
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expect(C.b()).toBe('B.b');
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class D extends Object {}
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expect(Object.getPrototypeOf(D)).toBe(Object);
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expect(Object.getPrototypeOf(D.prototype)).toBe(Object.prototype);
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expect(D.keys).toBe(Object.keys);
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class E {}
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expect(Object.getPrototypeOf(E)).toBe(Function.prototype);
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expect(Object.getPrototypeOf(E.prototype)).toBe(Object.prototype);
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expect(E).not.toHaveProperty('keys');
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