[i18n] unit test for commas in Polymer

ui/base/template_expressions_unittest.cc

 // Copyright 2015 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 "ui/base/template_expressions.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace ui {
 
+// Tip: ui_base_unittests --gtest_filter='TemplateExpressionsTest.*' to run
+// these tests.
+
 TEST(TemplateExpressionsTest, ReplaceTemplateExpressionsPieces) {
   TemplateReplacements substitutions;
   substitutions["test"] = "word";
   substitutions["5"] = "number";
 
   EXPECT_EQ("", ReplaceTemplateExpressions("", substitutions));
   EXPECT_EQ("word", ReplaceTemplateExpressions("$i18n{test}", substitutions));
   EXPECT_EQ("number ", ReplaceTemplateExpressions("$i18n{5} ", substitutions));
   EXPECT_EQ("multiple: word, number.",
             ReplaceTemplateExpressions("multiple: $i18n{test}, $i18n{5}.",
@@ skipping 44 matching lines @@
                 "<div>[[Call('$i18nPolymer{singleSample}')]]", substitutions));
   // This resolves |Call('\"moo\" said the cow')| to Polymer, which is
   // presented as |"moo" said the cow| to the user.
   EXPECT_EQ("<div>[[Call('\\\"moo\\\" said the cow')]]",
             ReplaceTemplateExpressions(
                 "<div>[[Call('$i18nPolymer{doubleSample}')]]", substitutions));
 }
 
 TEST(TemplateExpressionsTest, ReplaceTemplateExpressionsPolymerMixed) {
   static TemplateReplacements substitutions;
-  substitutions["punctuationSample"] = "a\"b'c<d>e&f";
+  substitutions["punctuationSample"] = "a\"b'c<d>e&f,g";
   substitutions["htmlSample"] = "<div>hello</div>";
-  EXPECT_EQ("a\\\"b\\'c<d>e&f",
+  EXPECT_EQ("a\\\"b\\'c<d>e&f\\,g",
             ReplaceTemplateExpressions("$i18nPolymer{punctuationSample}",
                                        substitutions));
   EXPECT_EQ("<div>hello</div>", ReplaceTemplateExpressions(
                                     "$i18nPolymer{htmlSample}", substitutions));
-  EXPECT_EQ("multiple: <div>hello</div>, a\\\"b\\'c<d>e&f.",
+  EXPECT_EQ("multiple: <div>hello</div>, a\\\"b\\'c<d>e&f\\,g.",
             ReplaceTemplateExpressions("multiple: $i18nPolymer{htmlSample}, "
                                        "$i18nPolymer{punctuationSample}.",
                                        substitutions));
 }
 
 }  // namespace ui