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Diffstat (limited to 'js/src/tests/test262/built-ins/RegExp/prototype/exec/failure-lastindex-access.js')
-rw-r--r-- | js/src/tests/test262/built-ins/RegExp/prototype/exec/failure-lastindex-access.js | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/prototype/exec/failure-lastindex-access.js b/js/src/tests/test262/built-ins/RegExp/prototype/exec/failure-lastindex-access.js new file mode 100644 index 0000000000..9925767e23 --- /dev/null +++ b/js/src/tests/test262/built-ins/RegExp/prototype/exec/failure-lastindex-access.js @@ -0,0 +1,38 @@ +// Copyright (C) 2016 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +description: lastIndex is read but not written when global and sticky are unset. +es6id: 21.2.5.2.2 +info: | + 21.2.5.2.2 Runtime Semantics: RegExpBuiltinExec ( R, S ) + + 4. Let lastIndex be ? ToLength(? Get(R, "lastIndex")). + [...] + 8. If global is false and sticky is false, let lastIndex be 0. + [...] + 12. Repeat, while matchSucceeded is false + [...] + c. If r is failure, then + i. If sticky is true, then + 1. Perform ? Set(R, "lastIndex", 0, true). + 2. Return null. +---*/ + +var gets = 0; +var counter = { + valueOf: function() { + gets++; + return 0; + } +}; + +var r = /a/; +r.lastIndex = counter; + +var result = r.exec('nbc'); +assert.sameValue(result, null); +assert.sameValue(r.lastIndex, counter); +assert.sameValue(gets, 1); + +reportCompare(0, 0); |