@Test
public void from_off_through_idle_back_to_off() {
StateMachine atm = new ATMStateMachine();
atm.execute(new TurnedOn());
atm.execute(new TestedOk());
atm.execute(new TurnedOff());
assertThat(atm.getActiveStateName()).isEqualTo(OFF);
}
@Test
public void from_idle_to_idle_with_transaction() {
StateMachine atm = new ATMStateMachine();
atm.activeStateConfiguration(asList(IDLE));
atm.execute(new CardInserted());
atm.execute(new Authenticated());
atm.execute(new TransactionSelected());
assertThat(atm.getActiveStateName()).isEqualTo(IDLE);
}
@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);
}
@Test
public void simple_state_transfers() {
// Given
StateMachine atm = new ATMStateMachine();
// When
atm.execute(new TurnedOn());
// Then
assertThat(atm.getActiveStateName()).isEqualTo(SELF_TEST);
}