[i18n] $i18nPolymer to backslash escape

ui/base/template_expressions_unittest.cc

Index: ui/base/template_expressions_unittest.cc
diff --git a/ui/base/template_expressions_unittest.cc b/ui/base/template_expressions_unittest.cc
index c219d0c7db95cc82ef06593a6fc78e86c59b7cc3..34de1c42281169807760dfd51afc5754a014281a 100644
--- a/ui/base/template_expressions_unittest.cc
+++ b/ui/base/template_expressions_unittest.cc
@@ -54,4 +54,35 @@ TEST(TemplateExpressionsTest, ReplaceTemplateExpressionsRaw) {
             ReplaceTemplateExpressions("$i18nRaw{rawSample}", substitutions));
 }
 
+TEST(TemplateExpressionsTest, ReplaceTemplateExpressionsPolymerQuoting) {
+  static TemplateReplacements substitutions;
+  substitutions["singleSample"] = "don't do it";
+  substitutions["doubleSample"] = "\"mood\" said the cow";

[Dan Beam, 2017/02/14 02:34:45]

nit: moo

[dschuyler, 2017/02/14 17:59:36]

Done.

+  // This resolves |Call('don\'t do it')| to Polymer, which is presented as
+  // |don't do it| to the user.
+  EXPECT_EQ("<div>[[Call('don\\'t do it')]]",
+            ReplaceTemplateExpressions(
+                "<div>[[Call('$i18nPolymer{singleSample}')]]", substitutions));
+  // This resolves |Call('\"mood\" said the cow')| to Polymer, which is
+  // presented as |"mood" said the cow| to the user.
+  EXPECT_EQ("<div>[[Call('\\\"mood\\\" said the cow')]]",
+            ReplaceTemplateExpressions(
+                "<div>[[Call('$i18nPolymer{doubleSample}')]]", substitutions));
+}
+
+TEST(TemplateExpressionsTest, ReplaceTemplateExpressionsPolymerMixed) {
+  static TemplateReplacements substitutions;
+  substitutions["punctuationSample"] = "a\"b'c<d>e&f";
+  substitutions["htmlSample"] = "<div>hello</div>";
+  EXPECT_EQ("a\\\"b\\'c<d>e&f",
+            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.",
+            ReplaceTemplateExpressions("multiple: $i18nPolymer{htmlSample}, "
+                                       "$i18nPolymer{punctuationSample}.",
+                                       substitutions));
+}
+
 }  // namespace ui