public function testFetchItem()
{
$data = [1 => 'test'];
$statementMock = $this->getMock('Zend_Db_Statement_Pdo', ['fetch'], [], '', false);
$statementMock->expects($this->once())->method('fetch')->will($this->returnValue($data));
$this->adapterMock->expects($this->once())->method('query')->with($this->selectMock, $this->anything())->will($this->returnValue($statementMock));
$objectMock = $this->getMock('Magento\\Framework\\Object', ['setData'], []);
$objectMock->expects($this->once())->method('setData')->with($data);
$this->entityFactoryMock->expects($this->once())->method('create')->with('Magento\\Review\\Model\\Review\\Summary')->will($this->returnValue($objectMock));
$item = $this->collection->fetchItem();
$this->assertEquals($objectMock, $item);
$this->assertEquals('primary_id', $item->getIdFieldName());
}
