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LibJS: Implement and use the GetSubstitution abstract operation

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Used by String.prototype.replace, String.prototype.replaceAll, and
RegExp.prototype [ @@replace ].
This commit is contained in:
Timothy Flynn 2021-07-05 16:16:48 -04:00 • committed by Linus Groh
parent 4985d3ef42
commit e0c9f58b0c
5 changed files with 129 additions and 6 deletions
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37
Userland/Libraries/LibJS/Tests/builtins/String/String.prototype.replace.js
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@ -102,3 +102,40 @@ test("functional regex replacement", () => {
})
).toBe("xd");
});
test("replacement with substitution", () => {
expect("abc".replace("b", "$")).toBe("a$c");
expect("abc".replace("b", "$.")).toBe("a$.c");
expect("abc".replace("b", "$$")).toBe("a$c");
expect("abc".replace("b", ">$$<")).toBe("a>$<c");
expect("abc".replace("b", "$$$$")).toBe("a$$c");
expect("abc".replace("b", "$&")).toBe("abc");
expect("a123c".replace(/\d+/, "$&")).toBe("a123c");
expect("abc".replace("b", "$`")).toBe("aac");
expect("aabc".replace("b", "$`")).toBe("aaaac");
expect("a123c".replace(/\d+/, "$`")).toBe("aac");
expect("abc".replace("b", "$'")).toBe("acc");
expect("abcc".replace("b", "$'")).toBe("acccc");
expect("a123c".replace(/\d+/, "$'")).toBe("acc");
expect("abc".replace("b", "$0")).toBe("a$0c");
expect("abc".replace("b", "$99")).toBe("a$99c");
expect("abc".replace("b", "$100")).toBe("a$100c");
expect("abc".replace(/(a)b(c)/, "$0")).toBe("$0");
expect("abc".replace(/(a)b(c)/, "$1")).toBe("a");
expect("abc".replace(/(a)b(c)/, "$2")).toBe("c");
expect("abc".replace(/(a)b(c)/, "$3")).toBe("$3");
expect("abc".replace(/(a)b(c)/, "$2b$1")).toBe("cba");
expect("abc".replace("b", "$<val>")).toBe("a$<val>c");
expect("abc".replace(/(?<val1>a)b(?<val2>c)/, "$<")).toBe("$<");
expect("abc".replace(/(?<val1>a)b(?<val2>c)/, "$<not_terminated")).toBe("$<not_terminated");
expect("abc".replace(/(?<val1>a)b(?<val2>c)/, "$<not_found>")).toBe("");
expect("abc".replace(/(?<val1>a)b(?<val2>c)/, "$<val1>")).toBe("a");
expect("abc".replace(/(?<val1>a)b(?<val2>c)/, "$<val2>")).toBe("c");
expect("abc".replace(/(?<val1>a)b(?<val2>c)/, "$<val2>b$<val1>")).toBe("cba");
});