public function testGetStorageDatabaseModel()
{
$dbModelMock = $this->getMockBuilder('Magento\\Core\\Model\\File\\Storage\\Database')->disableOriginalConstructor()->getMock();
$this->dbStorageFactoryMock->expects($this->once())->method('create')->will($this->returnValue($dbModelMock));
$this->assertSame($dbModelMock, $this->helper->getStorageDatabaseModel());
$this->assertSame($dbModelMock, $this->helper->getStorageDatabaseModel());
}