groups-object-undefined.js (1074B)
1 // Copyright 2017 the V8 project authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 description: The groups object is created unconditionally. 6 includes: [propertyHelper.js] 7 esid: sec-regexpbuiltinexec 8 features: [regexp-named-groups] 9 info: | 10 Runtime Semantics: RegExpBuiltinExec ( R, S ) 11 24. If _R_ contains any |GroupName|, then 12 a. Let _groups_ be ObjectCreate(*null*). 13 25. Else, 14 a. Let _groups_ be *undefined*. 15 26. Perform ! CreateDataProperty(_A_, `"groups"`, _groups_). 16 ---*/ 17 18 const re = /./; 19 const result = re.exec("a"); 20 assert.sameValue(Object.getPrototypeOf(result), Array.prototype); 21 assert(result.hasOwnProperty("groups")); 22 assert.sameValue("a", result[0]); 23 assert.sameValue(0, result.index); 24 assert.sameValue(undefined, result.groups); 25 verifyProperty(result, "groups", { 26 writable: true, 27 enumerable: true, 28 configurable: true, 29 }); 30 31 Array.prototype.groups = { a: "b" }; 32 assert.sameValue("$<a>", "a".replace(re, "$<a>")); 33 Array.prototype.groups = undefined; 34 35 reportCompare(0, 0);