duplicate-names-match.js (1695B)
1 // Copyright 2022 Kevin Gibbons. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 description: Matching behavior with duplicate named capture groups 6 esid: prod-GroupSpecifier 7 features: [regexp-duplicate-named-groups] 8 includes: [compareArray.js] 9 ---*/ 10 11 assert.compareArray("bab".match(/(?<x>a)|(?<x>b)/), ["b", undefined, "b"]); 12 assert.compareArray("bab".match(/(?<x>b)|(?<x>a)/), ["b", "b", undefined]); 13 14 assert.compareArray("aa".match(/(?:(?<x>a)|(?<x>b))\k<x>/), ["aa", "a", undefined]); 15 assert.compareArray("bb".match(/(?:(?<x>a)|(?<x>b))\k<x>/), ["bb", undefined, "b"]); 16 17 let matchResult = "aabb".match(/(?:(?:(?<x>a)|(?<x>b))\k<x>){2}/); 18 assert.compareArray(matchResult, ["aabb", undefined, "b"]); 19 assert.sameValue(matchResult.groups.x, "b"); 20 21 assert.sameValue("abab".match(/(?:(?:(?<x>a)|(?<x>b))\k<x>){2}/), null); 22 23 assert.sameValue("abab".match(/(?:(?<x>a)|(?<x>b))\k<x>/), null); 24 25 assert.sameValue("cdef".match(/(?:(?<x>a)|(?<x>b))\k<x>/), null); 26 27 assert.compareArray("xx".match(/^(?:(?<a>x)|(?<a>y)|z)\k<a>$/), ["xx", "x", undefined]); 28 assert.compareArray("z".match(/^(?:(?<a>x)|(?<a>y)|z)\k<a>$/), ["z", undefined, undefined]); 29 assert.sameValue("zz".match(/^(?:(?<a>x)|(?<a>y)|z)\k<a>$/), null); 30 assert.compareArray("zy".match(/(?<a>x)|(?:zy\k<a>)/), ["zy", undefined]); 31 32 assert.compareArray("xz".match(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/), ["xz", undefined, undefined]); 33 assert.compareArray("yz".match(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/), ["yz", undefined, undefined]); 34 assert.sameValue("xzx".match(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/), null); 35 assert.sameValue("yzy".match(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/), null); 36 37 reportCompare(0, 0);