@Test
public void showNotebookHistory() throws GitAPIException, IOException {

  //given
  notebookRepo = new GitNotebookRepo(conf);
  assertThat(notebookRepo.list(null)).isNotEmpty();
  //when
  List<Revision> testNotebookHistory = notebookRepo.revisionHistory(TEST_NOTE_ID, null);
  //then
  //no initial commit, empty history
  assertThat(testNotebookHistory).isEmpty();
}