Support more than 9 arguments for ReplaceStringPlaceholders()

base/string_util_unittest.cc

Index: base/string_util_unittest.cc
diff --git a/base/string_util_unittest.cc b/base/string_util_unittest.cc
index cd456429f0a992673309f9fac0ca312d494a5379..3efd78f9958bbf1d58232b8c1c53c09ae3b4be68 100644
--- a/base/string_util_unittest.cc
+++ b/base/string_util_unittest.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -882,6 +882,32 @@ TEST(StringUtilTest, ReplaceStringPlaceholders) {
   EXPECT_EQ(formatted, ASCIIToUTF16("9aa,8bb,7cc,6dd,5ee,4ff,3gg,2hh,1ii"));
 }
 
+TEST(StringUtilTest, ReplaceStringPlaceholdersMoreThan9Replacements) {
+  std::vector<string16> subst;
+  subst.push_back(ASCIIToUTF16("9a"));
+  subst.push_back(ASCIIToUTF16("8b"));
+  subst.push_back(ASCIIToUTF16("7c"));
+  subst.push_back(ASCIIToUTF16("6d"));
+  subst.push_back(ASCIIToUTF16("5e"));
+  subst.push_back(ASCIIToUTF16("4f"));
+  subst.push_back(ASCIIToUTF16("3g"));
+  subst.push_back(ASCIIToUTF16("2h"));
+  subst.push_back(ASCIIToUTF16("1i"));
+  subst.push_back(ASCIIToUTF16("0j"));
+  subst.push_back(ASCIIToUTF16("-1k"));
+  subst.push_back(ASCIIToUTF16("-2l"));
+  subst.push_back(ASCIIToUTF16("-3m"));
+  subst.push_back(ASCIIToUTF16("-4n"));
+
+  string16 formatted =
+      ReplaceStringPlaceholders(
+          ASCIIToUTF16("$1a,$2b,$3c,$4d,$5e,$6f,$7g,$8h,$9i,"
+                       "$10j,$11k,$12l,$13m,$14n"), subst, NULL);
+
+  EXPECT_EQ(formatted, ASCIIToUTF16("9aa,8bb,7cc,6dd,5ee,4ff,3gg,2hh,"
+                                    "1ii,0jj,-1kk,-2ll,-3mm,-4nn"));
+}
+
 TEST(StringUtilTest, ReplaceStringPlaceholdersTooFew) {
   // Test whether replacestringplaceholders works as expected when there
   // are fewer inputs than outputs.