Issue #1234 - Remove local CString variable from TraverseDocument()

test/plugin/UtilTest.cpp

Index: test/plugin/UtilTest.cpp
===================================================================
new file mode 100644
--- /dev/null
+++ b/test/plugin/UtilTest.cpp
@@ -0,0 +1,73 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2015 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <gtest/gtest.h>
+#include "../../src/plugin/PluginUtil.h"
+
+namespace
+{
+  template<class CharT, size_t M, size_t N>
+  bool BeginsWithForTesting(const CharT(&s)[M], const CharT(&beginning)[N])
+  {
+    return BeginsWith(std::basic_string<CharT>(s), beginning);
+  }
+}
+
+TEST(BeginsWith, EmptyIsEmpty)
+{
+  ASSERT_TRUE(BeginsWithForTesting(L"", L""));
+}
+
+TEST(BeginsWith, EmptyAlwaysBegins)
+{
+  ASSERT_TRUE(BeginsWithForTesting(L"foo", L""));
+}
+
+TEST(BeginsWith, EmptyNeverHasABeginning)
+{
+  ASSERT_FALSE(BeginsWithForTesting(L"", L"foo"));
+}
+
+TEST(BeginsWith, PartGood)
+{
+  ASSERT_TRUE(BeginsWithForTesting(L"foo", L"f"));
+  ASSERT_TRUE(BeginsWithForTesting(L"foo", L"fo"));
+}
+
+TEST(BeginsWith, AllGood)
+{
+  ASSERT_TRUE(BeginsWithForTesting(L"foo", L"foo"));
+}
+
+TEST(BeginsWith, PartBad)
+{
+  ASSERT_FALSE(BeginsWithForTesting(L"foo", L"b"));
+}
+
+TEST(BeginsWith, AllBad)
+{
+  ASSERT_FALSE(BeginsWithForTesting(L"foo", L"bar"));
+}
+
+TEST(BeginsWith, ExtraBad)
+{
+  ASSERT_FALSE(BeginsWithForTesting(L"foo", L"foobar"));
+}
+
+TEST(BeginsWith, LongerBad)
+{
+  ASSERT_FALSE(BeginsWithForTesting(L"foo", L"barfoo"));
+}