@Test
public void load_and_set_active_state_as_a_inner_state() {
StateMachine atm = new ATMStateMachine();
atm.activeStateConfiguration(Arrays.asList(SERVING_CUSTOMER, AUTHENTICATION));
atm.execute(new Authenticated());
assertThat(atm.getActiveStateConfiguration())
.containsSequence(SERVING_CUSTOMER, SELECTING_TRANSACTION);
}
@Test
public void from_idle_to_authentication() {
StateMachine atm = new ATMStateMachine();
atm.activeStateConfiguration(asList(IDLE));
atm.execute(new CardInserted());
assertThat(atm.getActiveStateConfiguration())
.containsSequence(SERVING_CUSTOMER, AUTHENTICATION);
}