Adding support for Reset in StringTokenizerT and HttpHeadersIterator....

net/http/http_util_unittest.cc

 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "net/http/http_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 87 matching lines @@
 
   HttpUtil::HeadersIterator it(headers.begin(), headers.end(), "\r\n");
   EXPECT_TRUE(it.AdvanceTo("foo"));
   EXPECT_EQ("foo", it.name());
   EXPECT_TRUE(it.AdvanceTo("bar"));
   EXPECT_EQ("bar", it.name());
   EXPECT_FALSE(it.AdvanceTo("blat"));
   EXPECT_FALSE(it.GetNext());  // should be at end of headers
 }
 
+TEST(HttpUtilTest, HeadersIterator_Reset) {
+  std::string headers = "foo: 1\r\n: 2\r\n3\r\nbar: 4";
+  HttpUtil::HeadersIterator it(headers.begin(), headers.end(), "\r\n");
+  // Search past "foo".
+  EXPECT_TRUE(it.AdvanceTo("bar"));
+  // Now try advancing to "foo".  This time it should fail since the iterator
+  // position is past it.
+  EXPECT_FALSE(it.AdvanceTo("foo"));
+  it.Reset();
+  // Now that we reset the iterator position, we should find 'foo'
+  EXPECT_TRUE(it.AdvanceTo("foo"));
+}
+
 TEST(HttpUtilTest, ValuesIterator) {
   std::string values = " must-revalidate,   no-cache=\"foo, bar\"\t, private ";
 
   HttpUtil::ValuesIterator it(values.begin(), values.end(), ',');
 
   ASSERT_TRUE(it.GetNext());
   EXPECT_EQ(std::string("must-revalidate"), it.value());
 
   ASSERT_TRUE(it.GetNext());
   EXPECT_EQ(std::string("no-cache=\"foo, bar\""), it.value());
@@ skipping 533 matching lines @@
         EXPECT_EQ(tests[i].expected_ranges[j].expected_first_byte_position,
                   ranges[j].first_byte_position());
         EXPECT_EQ(tests[i].expected_ranges[j].expected_last_byte_position,
                   ranges[j].last_byte_position());
         EXPECT_EQ(tests[i].expected_ranges[j].expected_suffix_length,
                   ranges[j].suffix_length());
       }
     }
   }
 }