[Autofill/Autocomplete Feature] Substring matching instead of prefix matching.

base/strings/string_util_unittest.cc

 // Copyright 2013 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 "base/strings/string_util.h"
 
 #include <math.h>
 #include <stdarg.h>
 
 #include <algorithm>
@@ skipping 1214 matching lines @@
   const char kDead[] = "dead";
   const std::string live = kLive;
   std::string dead = live;
   strncpy(WriteInto(&dead, 5), kDead, 4);
   EXPECT_EQ(kDead, dead);
   EXPECT_EQ(4u, dead.size());
   EXPECT_EQ(kLive, live);
   EXPECT_EQ(4u, live.size());
 }
 
+TEST(StringUtilTest, StartsAt) {
+  EXPECT_EQ(0u, StartsAt(ASCIIToUTF16("javascript:url"),
+                         ASCIIToUTF16("javascript"), true));
+  EXPECT_EQ(base::string16::npos, StartsAt(ASCIIToUTF16("JavaScript:url"),
+                                           ASCIIToUTF16("javascript"), true));
+  EXPECT_EQ(0u, StartsAt(ASCIIToUTF16("javascript:url"),
+                         ASCIIToUTF16("javascript"), false));
+  EXPECT_EQ(0u, StartsAt(ASCIIToUTF16("JavaScript:url"),
+                         ASCIIToUTF16("javascript"), false));
+  EXPECT_EQ(11u, StartsAt(ASCIIToUTF16("javascript:url"), ASCIIToUTF16("url"),
+                          false));
+  EXPECT_EQ(4u, StartsAt(ASCIIToUTF16("JavaScript:url"), ASCIIToUTF16("SCRIPT"),
+                         false));
+  EXPECT_EQ(base::string16::npos,
+            StartsAt(ASCIIToUTF16("java"), ASCIIToUTF16("javascript"), true));
+  EXPECT_EQ(base::string16::npos,
+            StartsAt(ASCIIToUTF16("java"), ASCIIToUTF16("javascript"), false));
+  EXPECT_EQ(base::string16::npos,
+            StartsAt(string16(), ASCIIToUTF16("javascript"), false));
+  EXPECT_EQ(base::string16::npos,
+            StartsAt(string16(), ASCIIToUTF16("javascript"), true));
+  EXPECT_EQ(0u, StartsAt(ASCIIToUTF16("java"), string16(), false));
+  EXPECT_EQ(0u, StartsAt(ASCIIToUTF16("java"), string16(), true));
+}
+
 }  // namespace base