@Test
public void testTokenStore() throws IOException {
HistoryServerStateStoreService store = createAndStartStore();
HistoryServerState state = store.loadState();
assertTrue("token state not empty", state.tokenState.isEmpty());
assertTrue("key state not empty", state.tokenMasterKeyState.isEmpty());
final DelegationKey key1 = new DelegationKey(1, 2, "keyData1".getBytes());
final MRDelegationTokenIdentifier token1 =