public function testApiCreateDir_CreatesDir_WhenNodeDoesNotExist()
{
$test = $this->getTest();
$fs = $this->createFilesystem();
$null = $this->getPrefixed('DIR_NULL');
$test->assertFalse($fs->exists($null));
$fs->createDir($null);
$test->assertTrue($fs->exists($null));
$test->assertTrue($fs->isDir($null));
}