Gittern\Gaufrette\GitternCommitishReadOnlyAdapter::keys PHP Method

    public function keys()
    {
        $iter = new \RecursiveIteratorIterator($this->tree);
        return array_keys(iterator_to_array($iter));
    }

 public function testCanCommitFromIndex()
 {
     $master = $this->repo->getObject('master');
     $this->index_adapter->write('anotherfile.txt', 'Another day, another file');
     $tree = $this->repo->getIndex()->createTree();
     $commit = new Entity\GitObject\Commit();
     $commit->setTree($tree);
     $commit->addParent($master);
     $commit->setMessage("Added another file");
     $commit->setAuthor(new Entity\GitObject\User("Tessie Testson", "*****@*****.**"));
     $commit->setCommitter(new Entity\GitObject\User("Tessie Testson", "*****@*****.**"));
     $commit->setAuthorTime(new \DateTime());
     $commit->setCommitTime(new \DateTime());
     $this->repo->desiccateGitObject($commit);
     $this->repo->setBranch('master', $commit);
     $this->repo->flush();
     $new_master_adapter = new GitternCommitishReadOnlyAdapter($this->repo, "master");
     $this->assertEquals(array('Tech specs.pdf', 'anotherfile.txt', 'classic.txt', 'newfile.txt'), $new_master_adapter->keys());
     $this->assertEquals('Another day, another file', $new_master_adapter->read('anotherfile.txt'));
 }