Added available bit to m_selectorIndex.

third_party/WebKit/Source/core/css/RuleSetTest.cpp

 /*
  * Copyright (c) 2014, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 13 matching lines @@
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/css/RuleSet.h"
 
 #include "core/css/CSSTestHelper.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
 TEST(RuleSetTest, findBestRuleSetAndAdd_CustomPseudoElements) {
   CSSTestHelper helper;
 
   helper.addCSSRules("summary::-webkit-details-marker { }");
   RuleSet& ruleSet = helper.ruleSet();
   AtomicString str("-webkit-details-marker");
   const TerminatedArray<RuleData>* rules =
@@ skipping 144 matching lines @@
 
 TEST(RuleSetTest, findBestRuleSetAndAdd_HostContextAndClass) {
   CSSTestHelper helper;
 
   helper.addCSSRules(".foo:host-context(*) { }");
   RuleSet& ruleSet = helper.ruleSet();
   const HeapVector<RuleData>* rules = ruleSet.shadowHostRules();
   ASSERT_EQ(0u, rules->size());
 }
 
+TEST(RuleSetTest, SelectorIndexLimit) {
+  StringBuilder builder;
+
+  for (unsigned i = 0; i < 16383; i++)
+    builder.append("div,");
+
+  builder.append("b,span {}");
+
+  CSSTestHelper helper;
+  helper.addCSSRules(builder.toString().ascii().data());
+  const RuleSet& ruleSet = helper.ruleSet();
+  const HeapTerminatedArray<RuleData>* rules = ruleSet.tagRules("b");
+  ASSERT_EQ(1u, rules->size());
+  EXPECT_EQ("b", rules->at(0).selector().tagQName().localName());
+  EXPECT_FALSE(ruleSet.tagRules("span"));
+}
+
 }  // namespace blink