public function testGetDefaultConnection()
 {
     $instance = new SparqlDBConnectionProvider('default');
     $this->assertInstanceOf('\\SMWSparqlDatabase', $instance->getConnection());
     $connection = $instance->getConnection();
     $this->assertSame($connection, $instance->getConnection());
     $instance->releaseConnection();
     $this->assertNotSame($connection, $instance->getConnection());
 }