some more primitive specializations, counting rows, dropping tables, tests

CMakeLists.txt

@@ -44,6 +44,14 @@ set(HEADERS
   serializer_uint16.hpp
   serializer_uint32.hpp
   serializer_uint64.hpp
+  serializer_int8.hpp
+  serializer_int16.hpp
+  serializer_int32.hpp
+  serializer_int64.hpp
+  serializer_float.hpp
+  serializer_double.hpp
+  serializer_stdstring.hpp
+  serializer_qstring.hpp
 )
 
 if (BUILD_STATIC)

database.cpp

@@ -85,7 +85,7 @@ void DataBase::open()
 bool DataBase::removeDirectory()
 {
     if (opened) {
-        throw Opened(name, "");
+        throw Opened(name, "remove database directory");
     }
     QString path(QStandardPaths::writableLocation(QStandardPaths::CacheLocation));
     path += "/" + getName();
@@ -108,3 +108,25 @@ bool DataBase::ready() const
     return opened;
 }
 
+void DataBase::drop()
+{
+    if (!opened) {
+        throw Closed("drop", name);
+    }
+
+    MDB_txn *txn;
+    int rc = mdb_txn_begin(environment, NULL, 0, &txn);
+    if (rc) {
+        throw Unknown(name, mdb_strerror(rc));
+    }
+    for (const std::pair<const std::string, _Table*>& pair : tables) {
+        rc = pair.second->drop(txn);
+        if (rc) {
+            throw Unknown(name, mdb_strerror(rc), pair.first);
+        }
+    }
+
+    mdb_txn_commit(txn);
+}
+
+

database.h

@@ -42,6 +42,7 @@ public:
     bool ready() const;
     bool removeDirectory();
     QString getName() const;
+    void drop();
 
     template <class K, class V>
     Table<K, V>* addTable(const std::string& name);
@@ -72,7 +73,7 @@ private:
 template <class K, class V>
 DataBase::Table<K, V>* DataBase::addTable(const std::string& p_name) {
     if (opened) {
-        throw Opened(name, p_name);
+        throw Opened(name, "add table " + p_name);
     }
     DataBase::Table<K, V>* table = new DataBase::Table<K, V>(p_name, this);
     tables.insert(std::make_pair(p_name, (_Table*)table));

exceptions.cpp

@@ -38,7 +38,7 @@ std::string DataBase::Directory::getMessage() const {
 DataBase::Closed::Closed(
     const std::string& p_operation,
     const std::string& p_dbName,
-    const std::string& p_tableName
+    const std::optional<std::string>& p_tableName
 ):
     Exception(),
     operation(p_operation),
@@ -46,22 +46,25 @@ DataBase::Closed::Closed(
     tableName(p_tableName) {}
 
 std::string DataBase::Closed::getMessage() const {
-    return "An attempt to perform operation " + operation
-            + " on closed database " + dbName
-            + " on table " + tableName;
+    std::string msg = "An attempt to perform operation " + operation
+                    + " on closed database " + dbName;
+    if (tableName.has_value()) {
+        msg += + " on table " + tableName.value();
+    }
+    return msg;
+
 }
 
-DataBase::Opened::Opened(const std::string& p_dbName, const std::string& p_tableName):
+DataBase::Opened::Opened(const std::string& p_dbName, const std::string& p_action):
     Exception(),
     dbName(p_dbName),
-    tableName(p_tableName) {}
+    action(p_action) {}
 
 
 std::string DataBase::Opened::getMessage() const {
-    return "An attempt to add table " + tableName
-            + " to the database " + dbName
-            + " but it's can't be done because the DataBase is already opened."
-            + " Please add all tables before opening DataBase.";
+    return "An attempt to " + action
+            + " (the database " + dbName
+            + ") but it's can't be done because the DataBase is already opened";
 }
 
 DataBase::NotFound::NotFound(

exceptions.h

@@ -43,23 +43,23 @@ private:
 
 class DataBase::Closed : public DataBase::Exception {
 public:
-    Closed(const std::string& p_operation, const std::string& dbName, const std::string& tableName);
+    Closed(const std::string& p_operation, const std::string& dbName, const std::optional<std::string>& tableName = std::nullopt);
 
     std::string getMessage() const;
 private:
     std::string operation;
     std::string dbName;
-    std::string tableName;
+    std::optional<std::string> tableName;
 };
 
 class DataBase::Opened : public DataBase::Exception {
 public:
-    Opened(const std::string& dbName, const std::string& tableName);
+    Opened(const std::string& dbName, const std::string& action);
 
     std::string getMessage() const;
 private:
     std::string dbName;
-    std::string tableName;
+    std::string action;
 };
 
 class DataBase::NotFound : public DataBase::Exception {

serializer.h

@@ -51,5 +51,13 @@ private:
 #include "serializer_uint32.hpp"
 #include "serializer_uint16.hpp"
 #include "serializer_uint8.hpp"
+#include "serializer_int64.hpp"
+#include "serializer_int32.hpp"
+#include "serializer_int16.hpp"
+#include "serializer_int8.hpp"
+#include "serializer_float.hpp"
+#include "serializer_double.hpp"
+#include "serializer_stdstring.hpp"
+#include "serializer_qstring.hpp"
 
 #endif // CORE_DATABASE_SERIALIZER_H

serializer_double.hpp

@@ -0,0 +1,53 @@
+// Squawk messenger.
+// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+//
+// 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 3 of the License, or
+// (at your option) any later version.
+//
+// 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/>.
+
+
+#ifndef CORE_DATABASE_SERIALIZER_DOUBLE_HPP
+#define CORE_DATABASE_SERIALIZER_DOUBLE_HPP
+
+template<>
+class DataBase::Serializer<double>
+{
+public:
+    Serializer():value(0) {};
+    Serializer(const double& p_value):value(p_value) {};
+    ~Serializer() {};
+
+    double deserialize(const MDB_val& data) {
+        std::memcpy(&value, data.mv_data, 8);
+        return value;
+    };
+    MDB_val setData(const double& data) {
+        value = data;
+        return getData();
+    };
+    MDB_val getData() {
+        MDB_val result;
+        result.mv_data = &value;
+        result.mv_size = 8;
+        return result;
+    };
+    void clear() {};    //not possible;
+
+private:
+    double value;
+};
+
+
+#endif //CORE_DATABASE_SERIALIZER_DOUBLE_HPP
+
+
+

serializer_float.hpp

@@ -0,0 +1,53 @@
+// Squawk messenger.
+// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+//
+// 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 3 of the License, or
+// (at your option) any later version.
+//
+// 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/>.
+
+
+#ifndef CORE_DATABASE_SERIALIZER_FLOAT_HPP
+#define CORE_DATABASE_SERIALIZER_FLOAT_HPP
+
+template<>
+class DataBase::Serializer<float>
+{
+public:
+    Serializer():value(0) {};
+    Serializer(const float& p_value):value(p_value) {};
+    ~Serializer() {};
+
+    float deserialize(const MDB_val& data) {
+        std::memcpy(&value, data.mv_data, 4);
+        return value;
+    };
+    MDB_val setData(const float& data) {
+        value = data;
+        return getData();
+    };
+    MDB_val getData() {
+        MDB_val result;
+        result.mv_data = &value;
+        result.mv_size = 4;
+        return result;
+    };
+    void clear() {};    //not possible;
+
+private:
+    float value;
+};
+
+
+#endif //CORE_DATABASE_SERIALIZER_FLOAT_HPP
+
+
+

serializer_int16.hpp

@@ -0,0 +1,50 @@
+// Squawk messenger.
+// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+//
+// 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 3 of the License, or
+// (at your option) any later version.
+//
+// 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/>.
+
+
+#ifndef CORE_DATABASE_SERIALIZER_INT16_HPP
+#define CORE_DATABASE_SERIALIZER_INT16_HPP
+
+template<>
+class DataBase::Serializer<int16_t>
+{
+public:
+    Serializer():value(0) {};
+    Serializer(const int16_t& p_value):value(p_value) {};
+    ~Serializer() {};
+
+    int16_t deserialize(const MDB_val& data) {
+        std::memcpy(&value, data.mv_data, 2);
+        return value;
+    };
+    MDB_val setData(const int16_t& data) {
+        value = data;
+        return getData();
+    };
+    MDB_val getData() {
+        MDB_val result;
+        result.mv_data = &value;
+        result.mv_size = 2;
+        return result;
+    };
+    void clear() {};    //not possible;
+
+private:
+    int16_t value;
+};
+
+
+#endif //CORE_DATABASE_SERIALIZER_INT16_HPP

serializer_int32.hpp

@@ -0,0 +1,53 @@
+// Squawk messenger.
+// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+//
+// 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 3 of the License, or
+// (at your option) any later version.
+//
+// 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/>.
+
+
+#ifndef CORE_DATABASE_SERIALIZER_INT32_HPP
+#define CORE_DATABASE_SERIALIZER_INT32_HPP
+
+template<>
+class DataBase::Serializer<int32_t>
+{
+public:
+    Serializer():value(0) {};
+    Serializer(const int32_t& p_value):value(p_value) {};
+    ~Serializer() {};
+
+    int32_t deserialize(const MDB_val& data) {
+        std::memcpy(&value, data.mv_data, 4);
+        return value;
+    };
+    MDB_val setData(const int32_t& data) {
+        value = data;
+        return getData();
+    };
+    MDB_val getData() {
+        MDB_val result;
+        result.mv_data = &value;
+        result.mv_size = 4;
+        return result;
+    };
+    void clear() {};    //not possible;
+
+private:
+    int32_t value;
+};
+
+
+#endif //CORE_DATABASE_SERIALIZER_INT32_HPP
+
+
+

serializer_int64.hpp

@@ -0,0 +1,53 @@
+// Squawk messenger.
+// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+//
+// 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 3 of the License, or
+// (at your option) any later version.
+//
+// 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/>.
+
+
+#ifndef CORE_DATABASE_SERIALIZER_INT64_HPP
+#define CORE_DATABASE_SERIALIZER_INT64_HPP
+
+template<>
+class DataBase::Serializer<int64_t>
+{
+public:
+    Serializer():value(0) {};
+    Serializer(const int64_t& p_value):value(p_value) {};
+    ~Serializer() {};
+
+    int64_t deserialize(const MDB_val& data) {
+        std::memcpy(&value, data.mv_data, 8);
+        return value;
+    };
+    MDB_val setData(const int64_t& data) {
+        value = data;
+        return getData();
+    };
+    MDB_val getData() {
+        MDB_val result;
+        result.mv_data = &value;
+        result.mv_size = 8;
+        return result;
+    };
+    void clear() {};    //not possible;
+
+private:
+    int64_t value;
+};
+
+
+#endif //CORE_DATABASE_SERIALIZER_INT64_HPP
+
+
+

serializer_int8.hpp

@@ -0,0 +1,53 @@
+// Squawk messenger.
+// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+//
+// 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 3 of the License, or
+// (at your option) any later version.
+//
+// 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/>.
+
+
+#ifndef CORE_DATABASE_SERIALIZER_INT8_HPP
+#define CORE_DATABASE_SERIALIZER_INT8_HPP
+
+template<>
+class DataBase::Serializer<int8_t>
+{
+public:
+    Serializer():value(0) {};
+    Serializer(const int8_t& p_value):value(p_value) {};
+    ~Serializer() {};
+
+    int8_t deserialize(const MDB_val& data) {
+        std::memcpy(&value, data.mv_data, 1);
+        return value;
+    };
+    MDB_val setData(const int8_t& data) {
+        value = data;
+        return getData();
+    };
+    MDB_val getData() {
+        MDB_val result;
+        result.mv_data = &value;
+        result.mv_size = 1;
+        return result;
+    };
+    void clear() {};    //not possible;
+
+private:
+    int8_t value;
+};
+
+
+#endif //CORE_DATABASE_SERIALIZER_INT8_HPP
+
+
+

serializer_qstring.hpp

@@ -0,0 +1,58 @@
+// Squawk messenger.
+// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+//
+// 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 3 of the License, or
+// (at your option) any later version.
+//
+// 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/>.
+
+
+#ifndef CORE_DATABASE_SERIALIZER_QSTRING_HPP
+#define CORE_DATABASE_SERIALIZER_QSTRING_HPP
+
+#include <QString>
+#include <QByteArray>
+
+template<>
+class DataBase::Serializer<QString>
+{
+public:
+    Serializer():value() {};
+    Serializer(const QString& p_value):value(p_value.toUtf8()) {};
+    ~Serializer() {};
+
+    QString deserialize(const MDB_val& data) {
+        value = QByteArray((char*)data.mv_data, data.mv_size);
+        return QString::fromUtf8(value);
+    };
+    MDB_val setData(const QString& data) {
+        value = data.toUtf8();
+        return getData();
+    };
+    MDB_val getData() {
+        MDB_val result;
+        result.mv_data = value.data();
+        result.mv_size = value.size();
+        return result;
+    };
+    void clear() {};    //not possible;
+
+private:
+    QByteArray value;
+};
+
+
+#endif //CORE_DATABASE_SERIALIZER_QSTRING_HPP
+
+
+
+
+

serializer_stdstring.hpp

@@ -0,0 +1,54 @@
+// Squawk messenger.
+// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+//
+// 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 3 of the License, or
+// (at your option) any later version.
+//
+// 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/>.
+
+
+#ifndef CORE_DATABASE_SERIALIZER_STDSTRING_HPP
+#define CORE_DATABASE_SERIALIZER_STDSTRING_HPP
+
+template<>
+class DataBase::Serializer<std::string>
+{
+public:
+    Serializer():value() {};
+    Serializer(const std::string& p_value):value(p_value) {};
+    ~Serializer() {};
+
+    std::string deserialize(const MDB_val& data) {
+        value = std::string((char*)data.mv_data, data.mv_size);
+        return value;
+    };
+    MDB_val setData(const std::string& data) {
+        value = data;
+        return getData();
+    };
+    MDB_val getData() {
+        MDB_val result;
+        result.mv_data = (char*)value.c_str();
+        result.mv_size = value.size();
+        return result;
+    };
+    void clear() {};    //not possible;
+
+private:
+    std::string value;
+};
+
+
+#endif //CORE_DATABASE_SERIALIZER_STDSTRING_HPP
+
+
+
+

serializer_uint16.hpp

@@ -36,7 +36,7 @@ public:
     };
     MDB_val getData() {
         MDB_val result;
-        result.mv_data = &value,
+        result.mv_data = &value;
         result.mv_size = 2;
         return result;
     };

serializer_uint32.hpp

@@ -36,7 +36,7 @@ public:
     };
     MDB_val getData() {
         MDB_val result;
-        result.mv_data = &value,
+        result.mv_data = &value;
         result.mv_size = 4;
         return result;
     };

serializer_uint64.hpp

@@ -36,7 +36,7 @@ public:
     };
     MDB_val getData() {
         MDB_val result;
-        result.mv_data = &value,
+        result.mv_data = &value;
         result.mv_size = 8;
         return result;
     };

serializer_uint8.hpp

@@ -36,7 +36,7 @@ public:
     };
     MDB_val getData() {
         MDB_val result;
-        result.mv_data = &value,
+        result.mv_data = &value;
         result.mv_size = 1;
         return result;
     };

table.cpp

@@ -24,3 +24,46 @@ DataBase::_Table::_Table(const std::string& p_name, DataBase* parent):
 }
 
 DataBase::_Table::~_Table() {}
+
+
+void DataBase::_Table::drop()
+{
+    if (!db->opened) {
+        throw Closed("drop", db->name, name);
+    }
+
+    MDB_txn *txn;
+    int rc = mdb_txn_begin(db->environment, NULL, 0, &txn);
+    if (rc) {
+        throw Unknown(db->name, mdb_strerror(rc), name);
+    }
+    rc = drop(txn);
+    if (rc) {
+        throw Unknown(db->name, mdb_strerror(rc), name);
+    }
+
+    mdb_txn_commit(txn);
+}
+
+int DataBase::_Table::drop(MDB_txn* transaction)
+{
+    return mdb_drop(transaction, dbi, 0);
+}
+
+uint32_t DataBase::_Table::count() const
+{
+    if (!db->opened) {
+        throw Closed("count", db->name, name);
+    }
+
+    MDB_txn *txn;
+    MDB_stat stat;
+    int rc = mdb_txn_begin(db->environment, NULL, 0, &txn);
+    rc = mdb_stat(txn, dbi, &stat);
+    if (rc) {
+        throw Unknown(db->name, mdb_strerror(rc), name);
+    }
+    uint32_t amount = stat.ms_entries;
+    mdb_txn_abort(txn);
+    return amount;
+}

table.h

@@ -21,12 +21,19 @@
 #include "serializer.h"
 
 class DataBase::_Table {
-public:
+    friend class DataBase;
+protected:
     _Table(const std::string& name, DataBase* parent);
     virtual ~_Table();
 
     virtual int createTable(MDB_txn * transaction) = 0;
+    virtual int drop(MDB_txn * transaction);
+
 public:
+    virtual void drop();
+    virtual uint32_t count() const;
+
+protected:
     MDB_dbi dbi;
     DataBase* db;
     const std::string name;
@@ -40,7 +47,7 @@ protected:
 };
 
 template <class K, class V>
-class DataBase::Table : private DataBase::_Table {
+class DataBase::Table : public DataBase::_Table {
     friend class DataBase;
 private:
     Table(const std::string& name, DataBase* parent);

table.hpp

@@ -164,6 +164,26 @@ inline int DataBase::_Table::makeTable<uint8_t>(MDB_txn* transaction) {
     return mdb_dbi_open(transaction, name.c_str(), MDB_CREATE | MDB_INTEGERKEY, &dbi);
 }
 
+template<>
+inline int DataBase::_Table::makeTable<int64_t>(MDB_txn* transaction) {
+    return mdb_dbi_open(transaction, name.c_str(), MDB_CREATE | MDB_INTEGERKEY, &dbi);
+}
+
+template<>
+inline int DataBase::_Table::makeTable<int32_t>(MDB_txn* transaction) {
+    return mdb_dbi_open(transaction, name.c_str(), MDB_CREATE | MDB_INTEGERKEY, &dbi);
+}
+
+template<>
+inline int DataBase::_Table::makeTable<int16_t>(MDB_txn* transaction) {
+    return mdb_dbi_open(transaction, name.c_str(), MDB_CREATE | MDB_INTEGERKEY, &dbi);
+}
+
+template<>
+inline int DataBase::_Table::makeTable<int8_t>(MDB_txn* transaction) {
+    return mdb_dbi_open(transaction, name.c_str(), MDB_CREATE | MDB_INTEGERKEY, &dbi);
+}
+
 template<class T>
 inline std::string DataBase::_Table::toString(const T& value) {
     return std::to_string(value);

test/basic.cpp

@@ -12,8 +12,7 @@ protected:
         t1(db->getTable<uint32_t, uint32_t>("table1")),
         t2(db->getTable<QString, QString>("table2")) {}
 
-    ~DataBaseTest() {
-    }
+    ~DataBaseTest() {}
 
     static void SetUpTestSuite() {
         if (db == nullptr) {
@@ -43,7 +42,12 @@ TEST_F(DataBaseTest, RemovingDirectory) {
     EXPECT_EQ(db->removeDirectory(), true);
 }
 
-TEST_F(DataBaseTest, OpeningDatabase) {
+TEST_F(DataBaseTest, OpeningClosingDatabase) {
+    EXPECT_EQ(db->ready(), false);
+    db->open();
+    EXPECT_EQ(db->ready(), true);
+    db->close();
+    EXPECT_EQ(db->ready(), false);
     db->open();
     EXPECT_EQ(db->ready(), true);
 }
@@ -51,16 +55,112 @@ TEST_F(DataBaseTest, OpeningDatabase) {
 TEST_F(DataBaseTest, AddingIntegerKey) {
     EXPECT_EQ(db->ready(), true);
     t1->addRecord(1, 2);
+    t1->addRecord(2, 2);
+    t1->addRecord(3, 15);
     EXPECT_EQ(t1->getRecord(1), 2);
 }
 
 TEST_F(DataBaseTest, AddingQStringKey) {
     EXPECT_EQ(db->ready(), true);
     t2->addRecord("hello", "world");
+    t2->addRecord("aaa", "gagdfsdf");
+    t2->addRecord("sdfhga", "DSFFDG");
+    t2->addRecord("sdfsda", "shgsdgfa");
     EXPECT_EQ(t2->getRecord("hello"), "world");
 }
 
-TEST_F(DataBaseTest, ClosingDatabase) {
-    db->close();
-    EXPECT_EQ(db->ready(), false);
+TEST_F(DataBaseTest, AddingRepeatingIntegerKey) {
+    EXPECT_EQ(db->ready(), true);
+    bool thrown = false;
+    try {
+        t1->addRecord(3, 24);
+    } catch (const DataBase::Exist e) {
+        thrown = true;
+    }
+    ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
+    EXPECT_EQ(t1->getRecord(3), 15);
 }
+
+TEST_F(DataBaseTest, AddingRepeatingStringKey) {
+    EXPECT_EQ(db->ready(), true);
+    bool thrown = false;
+    try {
+        t2->addRecord("sdfhga", "world");
+    } catch (const DataBase::Exist e) {
+        thrown = true;
+    }
+    ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
+    EXPECT_EQ(t2->getRecord("sdfhga"), "DSFFDG");
+}
+
+TEST_F(DataBaseTest, GettingNotExistingKeys) {
+    EXPECT_EQ(db->ready(), true);
+    bool thrown = false;
+    try {
+        QString wrong = t2->getRecord("almonds");
+    } catch (const DataBase::NotFound e) {
+        thrown = true;
+    }
+    ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
+
+    thrown = false;
+    try {
+        uint32_t wrong = t1->getRecord(64);
+    } catch (const DataBase::NotFound e) {
+        thrown = true;
+    }
+    ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
+}
+
+TEST_F(DataBaseTest, Persistence) {
+    EXPECT_EQ(db->ready(), true);
+    db->close();
+    delete db;
+
+    db = new DataBase("testBase");
+    t1 = db->addTable<uint32_t, uint32_t>("table1");
+    t2 = db->addTable<QString, QString>("table2");
+    db->open();
+
+    EXPECT_EQ(t1->getRecord(3), 15);
+    EXPECT_EQ(t1->getRecord(1), 2);
+    EXPECT_EQ(t1->getRecord(2), 2);
+    EXPECT_EQ(t2->getRecord("hello"), "world");
+    EXPECT_EQ(t2->getRecord("aaa"), "gagdfsdf");
+    EXPECT_EQ(t2->getRecord("sdfhga"), "DSFFDG");
+    EXPECT_EQ(t2->getRecord("sdfsda"), "shgsdgfa");
+
+    bool thrown = false;
+    try {
+        QString wrong = t2->getRecord("cats");
+    } catch (const DataBase::NotFound e) {
+        thrown = true;
+    }
+    ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
+
+    thrown = false;
+    try {
+        uint32_t wrong = t1->getRecord(7893);
+    } catch (const DataBase::NotFound e) {
+        thrown = true;
+    }
+    ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
+}
+
+TEST_F(DataBaseTest, CountAndDrop) {
+    EXPECT_EQ(db->ready(), true);
+    EXPECT_EQ(t1->count(), 3);
+    EXPECT_EQ(t2->count(), 4);
+
+    db->drop();
+
+    EXPECT_EQ(t1->count(), 0);
+    EXPECT_EQ(t2->count(), 0);
+
+    t1->addRecord(2, 2);
+    t2->addRecord("sdfhga", "world");
+
+    EXPECT_EQ(t1->count(), 1);
+    EXPECT_EQ(t2->count(), 1);
+}
+