public function testApiCreateDir_CreatesDirectory_WhenNodeExistAndIsDirectory()
{
$test = $this->getTest();
$fs = $this->createFilesystem();
$p = $this->getPrefixed('DIR_A');
$d = $this->getPrefixed('FILE_C');
$test->assertTrue($fs->exists($p));
$test->assertTrue($fs->exists($d));
$fs->createDir($p);
$test->assertTrue($fs->exists($p));
$test->assertFalse($fs->exists($d));
}