@Test
public void getFilesInFolderForName() throws Exception {

    final String filename = "filename";
    final String folderId = "folderId";
    when(driveDataStreams.getFilesInFolder(folderId, filename)).thenReturn(Single.just(fileList));
    final TestObserver<FileList> testObserver = driveStreamsManager.getFilesInFolder(folderId, filename).test();
    testObserver.assertValue(fileList);
    testObserver.assertComplete();
    testObserver.assertNoErrors();
}