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LibJS: Report string properties using UTF-16 code units

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String length is reported as the number of UTF-16 code units, and string
indices are reported as the UTF-16 code units themselves.
This commit is contained in:
Timothy Flynn 2021-07-19 09:03:52 -04:00 • committed by Andreas Kling
parent 0c42aece36
commit 2bba20d123
2 changed files with 33 additions and 7 deletions
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26
Userland/Libraries/LibJS/Tests/builtins/String/String.js
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@ -13,4 +13,30 @@ test("length", () => {
expect(new String("a").length).toBe(1);
expect(new String("\u180E").length).toBe(1);
expect(new String("\uDBFF\uDFFF").length).toBe(2);
// Issue #2280
expect("⛳".length).toBe(1);
expect("🔥".length).toBe(2);
expect("🔥🔥🔥".length).toBe(6);
expect("👨‍👩‍👦".length).toBe(8);
expect("👩‍❤️‍💋‍👩".length).toBe(11);
});
test("indices", () => {
expect("abc"[0]).toBe("a");
expect("abc"[1]).toBe("b");
expect("abc"[2]).toBe("c");
expect("abc"[3]).toBeUndefined();
expect("😀"[0]).toBe("\ud83d");
expect("😀"[1]).toBe("\ude00");
expect("😀"[2]).toBeUndefined();
});
test("properties", () => {
expect(Object.getOwnPropertyNames("")).toEqual(["length"]);
expect(Object.getOwnPropertyNames("a")).toEqual(["0", "length"]);
expect(Object.getOwnPropertyNames("ab")).toEqual(["0", "1", "length"]);
expect(Object.getOwnPropertyNames("abc")).toEqual(["0", "1", "2", "length"]);
expect(Object.getOwnPropertyNames("😀")).toEqual(["0", "1", "length"]);
});