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LibJS: Implement RegExp legacy static properties
RegExp legacy static properties Spec url is https://github.com/tc39/proposal-regexp-legacy-features
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leeight
Linus Groh
parent
5e2fe7e2bf
commit
0d96468e9b
12 changed files with 726 additions and 9 deletions
198
Userland/Libraries/LibJS/Tests/builtins/RegExp/RegExp.legacy.js
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198
Userland/Libraries/LibJS/Tests/builtins/RegExp/RegExp.legacy.js
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// NOTE: This file came from https://github.com/v8/v8/blob/main/test/mjsunit/regexp-static.js
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// and was modified to match LibJS test framework.
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test("basic functionality", () => {
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var re = /((\d+)\.(\d+))/;
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var s = "abc123.456def";
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re.exec(s);
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expect(RegExp.input).toBe(s);
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expect(RegExp["$_"]).toBe(s);
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expect(RegExp.lastMatch).toBe("123.456");
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expect(RegExp["$&"]).toBe("123.456");
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expect(RegExp.lastParen).toBe("456");
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expect(RegExp["$+"]).toBe("456");
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expect(RegExp.leftContext).toBe("abc");
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expect(RegExp["$`"]).toBe("abc");
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expect(RegExp.rightContext).toBe("def");
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expect(RegExp["$'"]).toBe("def");
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expect(RegExp.$1).toBe("123.456");
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expect(RegExp.$2).toBe("123");
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expect(RegExp.$3).toBe("456");
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expect(RegExp.$4).toBe("");
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expect(RegExp.$5).toBe("");
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expect(RegExp.$6).toBe("");
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expect(RegExp.$7).toBe("");
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expect(RegExp.$8).toBe("");
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expect(RegExp.$9).toBe("");
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});
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test("They should be read only", () => {
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RegExp["$1"] = "fisk";
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expect(RegExp.$1).toBe("123.456");
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RegExp.input = Number();
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expect(typeof RegExp.input).toBe(typeof String());
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});
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test("They should be read only (strict mode)", () => {
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"use strict";
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try {
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RegExp["$1"] = "fisk";
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expect(true).toBeFalse(); // SHOULD NOT REACH HERE
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} catch (e) {
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expect(String(e)).toBe("TypeError: Cannot set property '$1' of [object RegExpConstructor]");
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expect(RegExp.$1).toBe("123.456");
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}
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RegExp.input = Number();
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expect(typeof RegExp.input).toBe(typeof String());
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});
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test("the original accessor vs the alias accessor", () => {
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expect(Object.getOwnPropertyDescriptor(RegExp, "input").get).not.toBe(
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Object.getOwnPropertyDescriptor(RegExp, "$_").get
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);
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expect(Object.getOwnPropertyDescriptor(RegExp, "input").set).not.toBe(
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Object.getOwnPropertyDescriptor(RegExp, "$_").set
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);
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expect(Object.getOwnPropertyDescriptor(RegExp, "lastMatch").get).not.toBe(
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Object.getOwnPropertyDescriptor(RegExp, "$&").get
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);
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expect(Object.getOwnPropertyDescriptor(RegExp, "lastParen").get).not.toBe(
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Object.getOwnPropertyDescriptor(RegExp, "$+").get
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);
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expect(Object.getOwnPropertyDescriptor(RegExp, "leftContext").get).not.toBe(
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Object.getOwnPropertyDescriptor(RegExp, "$`").get
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);
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expect(Object.getOwnPropertyDescriptor(RegExp, "rightContext").get).not.toBe(
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Object.getOwnPropertyDescriptor(RegExp, "$'").get
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);
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});
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test("match should all behave as if exec were called.", () => {
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var re = /((\d+)\.(\d+))/;
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var s = "ghi789.012jkl";
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s.match(re);
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expect(RegExp.input).toBe(s);
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expect(RegExp["$_"]).toBe(s);
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expect(RegExp.lastMatch).toBe("789.012");
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expect(RegExp["$&"]).toBe("789.012");
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expect(RegExp.lastParen).toBe("012");
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expect(RegExp["$+"]).toBe("012");
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expect(RegExp.leftContext).toBe("ghi");
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expect(RegExp["$`"]).toBe("ghi");
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expect(RegExp.rightContext).toBe("jkl");
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expect(RegExp["$'"]).toBe("jkl");
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expect(RegExp.$1).toBe("789.012");
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expect(RegExp.$2).toBe("789");
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expect(RegExp.$3).toBe("012");
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expect(RegExp.$4).toBe("");
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expect(RegExp.$5).toBe("");
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expect(RegExp.$6).toBe("");
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expect(RegExp.$7).toBe("");
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expect(RegExp.$8).toBe("");
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expect(RegExp.$9).toBe("");
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});
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test("replace should all behave as if exec were called.", () => {
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var re = /((\d+)\.(\d+))/;
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var s = "abc123.456def";
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s.replace(re, "whocares");
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expect(RegExp.input).toBe(s);
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expect(RegExp["$_"]).toBe(s);
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expect(RegExp.lastMatch).toBe("123.456");
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expect(RegExp["$&"]).toBe("123.456");
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expect(RegExp.lastParen).toBe("456");
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expect(RegExp["$+"]).toBe("456");
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expect(RegExp.leftContext).toBe("abc");
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expect(RegExp["$`"]).toBe("abc");
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expect(RegExp.rightContext).toBe("def");
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expect(RegExp["$'"]).toBe("def");
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expect(RegExp.$1).toBe("123.456");
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expect(RegExp.$2).toBe("123");
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expect(RegExp.$3).toBe("456");
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expect(RegExp.$4).toBe("");
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expect(RegExp.$5).toBe("");
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expect(RegExp.$6).toBe("");
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expect(RegExp.$7).toBe("");
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expect(RegExp.$8).toBe("");
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expect(RegExp.$9).toBe("");
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});
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test("test should all behave as if exec were called.", () => {
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var re = /((\d+)\.(\d+))/;
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var s = "ghi789.012jkl";
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re.test(s);
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expect(RegExp.input).toBe(s);
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expect(RegExp["$_"]).toBe(s);
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expect(RegExp.lastMatch).toBe("789.012");
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expect(RegExp["$&"]).toBe("789.012");
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expect(RegExp.lastParen).toBe("012");
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expect(RegExp["$+"]).toBe("012");
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expect(RegExp.leftContext).toBe("ghi");
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expect(RegExp["$`"]).toBe("ghi");
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expect(RegExp.rightContext).toBe("jkl");
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expect(RegExp["$'"]).toBe("jkl");
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expect(RegExp.$1).toBe("789.012");
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expect(RegExp.$2).toBe("789");
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expect(RegExp.$3).toBe("012");
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expect(RegExp.$4).toBe("");
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expect(RegExp.$5).toBe("");
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expect(RegExp.$6).toBe("");
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expect(RegExp.$7).toBe("");
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expect(RegExp.$8).toBe("");
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expect(RegExp.$9).toBe("");
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});
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test("replace must interleave matching and replacing when a global regexp is matched and replaced with the result of a function", () => {
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var re = /(.)/g;
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function f() {
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return RegExp.$1;
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}
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expect("abcd".replace(re, f)).toBe("dddd");
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});
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test("the last parenthesis didn't match.", () => {
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expect(/foo(?:a(x))?/.exec("foobx")).toEqual(["foo", undefined]);
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expect(RegExp.lastParen).toBe("");
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});
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test("$1 to $9", () => {
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for (var i = 1; i <= 9; i++) {
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var haystack = "foo";
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var re_text = "^foo";
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for (var j = 0; j < i - 1; j++) {
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haystack += "x";
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re_text += "(x)";
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}
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re_text += "(?:a(x))?";
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haystack += "bx";
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var re = new RegExp(re_text);
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expect(re.test(haystack)).toBeTrue();
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for (var j = 1; j < i - 1; j++) {
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expect(RegExp["$" + j]).toBe("x");
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}
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expect(RegExp["$" + i]).toBe("");
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}
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});
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test("save the correct string as the last subject", () => {
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var foo =
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"lsdfj sldkfj sdklfj læsdfjl sdkfjlsdk fjsdl fjsdljskdj flsj flsdkj flskd regexp: /foobar/\nldkfj sdlkfj sdkl";
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expect(/^([a-z]+): (.*)/.test(foo.substring(foo.indexOf("regexp:")))).toBeTrue();
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expect(RegExp.$1).toBe("regexp");
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});
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test("calling with no argument is the same as calling with undefined.", () => {
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expect(/^undefined$/.test()).toBeTrue();
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expect(/^undefined$/.exec()).toEqual(["undefined"]);
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});
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