diff --git a/tests/model/DbTest.php b/tests/model/DbTest.php
new file mode 100644
index 0000000..11c7eb0
--- /dev/null
+++ b/tests/model/DbTest.php
@@ -0,0 +1,59 @@
+<?php
+
+/*
+ * @copyright NetMonsters <team@netmonsters.ru>
+ * @link http://netmonsters.ru
+ * @package Majestic
+ * @subpackage UnitTests
+ * @since 2011-11-1
+ * 
+ * Unit tests for Db class
+ */
+
+require_once dirname(__FILE__) . '/../../Registry.php';
+require_once dirname(__FILE__) . '/../../Config.php';
+require_once dirname(__FILE__) . '/../../model/Db.php';
+
+class DbTest extends PHPUnit_Framework_TestCase
+{
+
+    /**
+     * @expectedException Exception
+     */
+    public function testConnectNoParams()
+    {
+        Db::connect();
+    }
+    /**
+     * @expectedException Exception
+     * @expectedExceptionMessage Connection parameters must be an array
+     */
+    public function testConnectConfigNotArray()
+    {
+        Db::connect('name', 'config');
+    }
+
+    public function testConnectGlobalConfig()
+    {
+        $this->getMock('DbDriver', array(), array(), 'MySQLiDriverGlobalConfMock');
+        Config::set('Db', array('global' =>array('hostname' => 'localhost', 'driver' => 'MySQLiDriverGlobalConfMock')));
+        Db::connect('global');
+    }
+
+    public function testConnectWithConfigParam()
+    {
+        $this->getMock('DbDriver', array(), array(), 'MySQLiDriverMock');
+        $driver = Db::connect('mysql', array('hostname' => 'localhost', 'driver' => 'MySQLiDriverMock'));
+        $this->assertInstanceOf('DbDriver', $driver);
+    }
+    /**
+     * @expectedException Exception
+     * @expectedExceptionMessage Database driver must extends DbDriver
+     */
+    public function testConnectWithWrongDriver()
+    {
+        $this->getMock('NotDbDriver', array(), array(), 'NoDbDriverMock');
+        $driver = Db::connect('nodb', array('hostname' => 'localhost', 'driver' => 'NoDbDriverMock'));
+    }
+
+}
\ No newline at end of file