public function testAddListEmpty()
{
$fileReader = new DummyFileReader();
$jsonFileReader = new Json($fileReader);
$fileManager = new FileManager($jsonFileReader);
$result = $fileManager->addList([['key3' => 'value3']]);
$this->assertSame(40, $result);
$result = $fileManager->getAll();
$this->assertSame([['key3' => 'value3']], $result);
}
