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15 lines
265 B
JavaScript
15 lines
265 B
JavaScript
test("basic functionality", () => {
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function foo(a) {
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return a;
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}
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var x = undefined;
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expect(x).toBeUndefined();
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expect(foo(x)).toBeUndefined();
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var o = {};
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o.x = x;
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expect(o.x).toBeUndefined();
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expect(o.x).toBe(x);
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});
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