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9 lines
258 B
JavaScript
9 lines
258 B
JavaScript
test("basic functionality", () => {
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function Foo() {}
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Object.defineProperty(Foo, Symbol.hasInstance, {
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value: instance => instance === 2,
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});
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expect(new Foo() instanceof Foo).toBeFalse();
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expect(2 instanceof Foo).toBeTrue();
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});
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