Issue 6221 - Add native tests.

test/compiled/RegExp.cpp

+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-present 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 "compiled/String.h"
+
+TEST(TestRegexp, RegExp)
+{
+  auto id = GenerateRegExp(u"[0-9]*"_str, false);
+  EXPECT_EQ(id, 0);
+  EXPECT_FALSE(TestRegExp(id, u"abcd"_str));
+  EXPECT_TRUE(TestRegExp(id, u"1234"_str));
+
+  DeleteRegExp(id);
+  // RegExp has been delete: all is false
+  EXPECT_FALSE(TestRegExp(id, u"abcd"_str));

[sergei, 2018/01/30 13:05:37]

I'm not sure that it should work this way, but OK, I guess it will be changes
later anyway.

+  EXPECT_FALSE(TestRegExp(id, u"1234"_str));
+}