Add StringBufferStream

test/cctest/test-strings.cc

Index: test/cctest/test-strings.cc
diff --git a/test/cctest/test-strings.cc b/test/cctest/test-strings.cc
index 5a9ccbb5790732cb0b42528860867bcbafa811be..68e735b886e45c9a8dbfa53c3330f1af0c0ac6f9 100644
--- a/test/cctest/test-strings.cc
+++ b/test/cctest/test-strings.cc
@@ -198,18 +198,22 @@ static Handle<String> ConstructBalanced(
 
 
 static StringInputBuffer buffer;
-
+static ConsStringIteratorOp consStringIteratorOp;
 
 static void Traverse(Handle<String> s1, Handle<String> s2) {
   int i = 0;
   buffer.Reset(*s1);
+  StringCharacterStream characterStream(*s1, 0, &consStringIteratorOp);
   StringInputBuffer buffer2(*s2);
   while (buffer.has_more()) {
     CHECK(buffer2.has_more());
+    CHECK(characterStream.HasMore());
     uint16_t c = buffer.GetNext();
     CHECK_EQ(c, buffer2.GetNext());
+    CHECK_EQ(c, characterStream.GetNext());
     i++;
   }
+  CHECK(!characterStream.HasMore());
   CHECK_EQ(s1->length(), i);
   CHECK_EQ(s2->length(), i);
 }
@@ -219,10 +223,13 @@ static void TraverseFirst(Handle<String> s1, Handle<String> s2, int chars) {
   int i = 0;
   buffer.Reset(*s1);
   StringInputBuffer buffer2(*s2);
+  StringCharacterStream characterStream(*s1, 0, &consStringIteratorOp);
   while (buffer.has_more() && i < chars) {
     CHECK(buffer2.has_more());
+    CHECK(characterStream.HasMore());
     uint16_t c = buffer.GetNext();
     CHECK_EQ(c, buffer2.GetNext());
+    CHECK_EQ(c, characterStream.GetNext());
     i++;
   }
   s1->Get(s1->length() - 1);