@Test
public void listStatus() throws IOException {

	final String sign = "folder_list_status";
	FilePath file = new FilePath(new Path(folder.getRoot().toPath().toString()));
	writeFile(new FilePath(new Path(folder.getRoot().toPath().toString(), sign)), sign);
	Assert.assertEquals(file.getFileSystem().listStatus(file.getPathStr()).length, 1);
}