Add unit test for ReplaceStringPlaceholders

base/string_util_unittest.cc

 // Copyright (c) 2010 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 <math.h>
 #include <stdarg.h>
 
 #include <limits>
 #include <sstream>
 
@@ skipping 995 matching lines @@
   subst.push_back("2h");
   subst.push_back("1i");
 
   std::string formatted =
       ReplaceStringPlaceholders(
           "$1a,$2b,$3c,$4d,$5e,$6f,$7g,$8h,$9i", subst, NULL);
 
   EXPECT_EQ(formatted, "9aa,8bb,7cc,6dd,5ee,4ff,3gg,2hh,1ii");
 }
 
+TEST(StringUtilTest, ReplaceStringPlaceholdersConsecutiveDollarSigns) {
+  std::vector<std::string> subst;
+  subst.push_back("a");
+  subst.push_back("b");
+  subst.push_back("c");
+  EXPECT_EQ(ReplaceStringPlaceholders("$$1 $$$2 $$$$3", subst, NULL),

[eroman, 2010/08/31 06:37:06]

nit: EXPECT_EQ(expected, actual).

+            "$1 $$2 $$$3");
+}
+
 TEST(StringUtilTest, SplitStringAlongWhitespace) {
   struct TestData {
     const std::wstring input;
     const size_t expected_result_count;
     const std::wstring output1;
     const std::wstring output2;
   } data[] = {
     { L"a",       1, L"a",  L""   },
     { L" ",       0, L"",   L""   },
     { L" a",      1, L"a",  L""   },
@@ skipping 225 matching lines @@
   SplitStringUsingSubstr(
       "unDELIMITERdeuxDELIMITERtroisDELIMITERquatreDELIMITERDELIMITERDELIMITER",
       "DELIMITER",
       &results);
   ASSERT_EQ(7u, results.size());
   EXPECT_THAT(
       results, ElementsAre("un", "deux", "trois", "quatre", "", "", ""));
 }
 
 }  // namespace base