16 lines
397 B
JavaScript
16 lines
397 B
JavaScript
var A_called = false;
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var X_called = false;
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class A { constructor() { A_called = true } }
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class X { constructor() { X_called = true } }
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class B extends A {}
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B.prototype.__proto__ = X.prototype;
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B.__proto__ = X;
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expect(new B() instanceof B).toBe(true);
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expect(new B() instanceof A).toBe(false);
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expect(new B() instanceof X).toBe(true);
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expect(A_called).toBe(false);
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expect(X_called).toBe(true);
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