public function testListFolder()
{
if (file_exists($this->testDir)) {
Filesystem::removeFolder($this->testDir);
}
mkdir($this->testDir);
file_put_contents($this->testDir . '/testfile.txt', 'dummy_data');
$reader = $this->contentService->getReader('File:||' . $this->testDir);
$list = $reader->getList();
$this->assertEquals(1, count($list));
$file = $list[0];
$writer = $file->getWriter();
$writer->write('new contents');
$this->assertEquals('new contents', file_get_contents($this->testDir . '/testfile.txt'));
}