public function testRemoveListEmpty()
{
$fileReader = new DummyFileReader();
$jsonFileReader = new Json($fileReader);
$fileManager = new FileManager($jsonFileReader);
$result = $fileManager->removeList([0]);
//$this->assertSame(4, $result); can be 2. https://travis-ci.org/Raphhh/balloon/jobs/60049978
$result = $fileManager->getAll();
$this->assertSame([], $result);
}
