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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 21.2.5.9
description: Behavior when some lastIndex writes should be skipped.
info: |
[...]
4. Let previousLastIndex be ? Get(rx, "lastIndex").
5. If SameValue(previousLastIndex, 0) is false, then
a. Perform ? Set(rx, "lastIndex", 0, true).
[...]
7. Let currentLastIndex be ? Get(rx, "lastIndex").
8. If SameValue(currentLastIndex, previousLastIndex) is false, then
a. Perform ? Set(rx, "lastIndex", previousLastIndex, true).
[...]
features: [Symbol.search]
---*/
var lastIndexValue;
var lastIndexValueAfterExec;
var lastIndexReads;
var lastIndexWrites;
var execCallCount;
var result;
var fakeRe = {
get lastIndex() {
lastIndexReads++;
return lastIndexValue;
},
set lastIndex(_) {
lastIndexWrites++;
lastIndexValue = _;
},
exec: function() {
execCallCount++;
lastIndexValue = lastIndexValueAfterExec;
return null;
}
};
function reset(value, valueAfterExec) {
lastIndexValue = value;
lastIndexValueAfterExec = valueAfterExec;
lastIndexReads = 0;
lastIndexWrites = 0;
execCallCount = 0;
}
reset(0, 0);
result = RegExp.prototype[Symbol.search].call(fakeRe);
assert.sameValue(result, -1);
assert.sameValue(lastIndexValue, 0);
assert.sameValue(lastIndexReads, 2);
assert.sameValue(lastIndexWrites, 0);
assert.sameValue(execCallCount, 1);
reset(420, 420);
result = RegExp.prototype[Symbol.search].call(fakeRe);
assert.sameValue(result, -1);
assert.sameValue(lastIndexValue, 420);
assert.sameValue(lastIndexReads, 2);
assert.sameValue(lastIndexWrites, 1);
assert.sameValue(execCallCount, 1);
reportCompare(0, 0);
|
