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Diffstat (limited to 'js/src/tests/test262/built-ins/RegExp/prototype/exec/failure-g-lastindex-reset.js')
-rw-r--r-- | js/src/tests/test262/built-ins/RegExp/prototype/exec/failure-g-lastindex-reset.js | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/prototype/exec/failure-g-lastindex-reset.js b/js/src/tests/test262/built-ins/RegExp/prototype/exec/failure-g-lastindex-reset.js new file mode 100644 index 0000000000..8b3dd5e333 --- /dev/null +++ b/js/src/tests/test262/built-ins/RegExp/prototype/exec/failure-g-lastindex-reset.js @@ -0,0 +1,54 @@ +// 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 and reset to 0 when global is set and the match fails. +es6id: 21.2.5.2.2 +info: | + 21.2.5.2.2 Runtime Semantics: RegExpBuiltinExec ( R, S ) + + [...] + 4. Let flags be R.[[OriginalFlags]]. + 5. If flags contains "g", let global be true, else let global be false. + [...] + 7. If global is false and sticky is false, let lastIndex be 0. + 8. Else, let lastIndex be ? ToLength(? Get(R, "lastIndex")). + [...] + 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. + ii. Let lastIndex be AdvanceStringIndex(S, lastIndex, fullUnicode). +---*/ + +var lastIndexReads; +var result; + +var r = /a/g; + +function reset(value) { + r.lastIndex = { + valueOf: function() { + lastIndexReads++; + return value; + } + }; + lastIndexReads = 0; +} + +reset(42); // lastIndex beyond end of string. +result = r.exec('abc'); +assert.sameValue(result, null); +assert.sameValue(r.lastIndex, 0); +assert.sameValue(lastIndexReads, 1); + +reset(-1); // No match. +result = r.exec('nbc'); +assert.sameValue(result, null); +assert.sameValue(r.lastIndex, 0); +assert.sameValue(lastIndexReads, 1); + +reportCompare(0, 0); |