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LibJS: Implement String.prototype.at with UTF-16 code units
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2 changed files with 17 additions and 4 deletions
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@ -13,3 +13,11 @@ test("basic functionality", () => {
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expect(string.at(-4)).toBeUndefined();
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expect(string.at(-Infinity)).toBeUndefined();
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});
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test("UTF-16", () => {
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var s = "😀";
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expect(s).toHaveLength(2);
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expect(s.at(0)).toBe("\ud83d");
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expect(s.at(1)).toBe("\ude00");
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expect(s.at(2)).toBeUndefined();
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});
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