Add skeleton for TestDatabase.cpp and test data for unit tests for the "empty recycle bin" functionality

tests/TestDatabase.cpp

@@ -0,0 +1,50 @@
+/*
+ *  Copyright (C) 2017 Vladimir Svyatski <v.unreal@gmail.com>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "TestDatabase.h"
+
+#include <QTest>
+
+#include "core/Database.h"
+#include "crypto/Crypto.h"
+
+QTEST_GUILESS_MAIN(TestDatabase)
+
+void TestDatabase::initTestCase()
+{
+    QVERIFY(Crypto::init());
+}
+
+void TestDatabase::testEmptyRecycleBinOnDisabled()
+{
+
+}
+
+void TestDatabase::testEmptyRecycleBinOnNotCreated()
+{
+
+}
+
+void TestDatabase::testEmptyRecycleBinOnEmpty()
+{
+
+}
+
+void TestDatabase::testEmptyRecycleBinWithHierarchicalData()
+{
+
+}