### Question:
ListenerService implements SettingsDependent { public boolean shouldCancelEvent(EntityEvent event) { Entity entity = event.getEntity(); return shouldCancelEvent(entity); } @Inject  ListenerService(Settings settings, DataSource dataSource, PlayerCache playerCache,
                    ValidationService validationService); boolean shouldCancelEvent(EntityEvent event); boolean shouldCancelEvent(Entity entity); boolean shouldCancelEvent(PlayerEvent event); boolean shouldCancelEvent(Player player); @Override void reload(Settings settings);  }### Answer:
@Test public void shouldHandleEventWithNullEntity() { EntityEvent event = mock(EntityEvent.class); given(event.getEntity()).willReturn(null); boolean result = listenerService.shouldCancelEvent(event); assertThat(result, equalTo(false)); }
@Test public void shouldHandleEntityEventWithNonPlayerEntity() { EntityEvent event = mock(EntityEvent.class); given(event.getEntity()).willReturn(mock(Entity.class)); boolean result = listenerService.shouldCancelEvent(event); assertThat(result, equalTo(false)); }
@Test public void shouldAllowAuthenticatedPlayer() { String playerName = "Bobby"; Player player = mockPlayerWithName(playerName); given(playerCache.isAuthenticated(playerName)).willReturn(true); EntityEvent event = mock(EntityEvent.class); given(event.getEntity()).willReturn(player); boolean result = listenerService.shouldCancelEvent(event); assertThat(result, equalTo(false)); verify(playerCache).isAuthenticated(playerName); verifyZeroInteractions(dataSource); }
@Test public void shouldDenyUnLoggedPlayer() { String playerName = "Tester"; Player player = mockPlayerWithName(playerName); given(playerCache.isAuthenticated(playerName)).willReturn(false); EntityEvent event = mock(EntityEvent.class); given(event.getEntity()).willReturn(player); boolean result = listenerService.shouldCancelEvent(event); assertThat(result, equalTo(true)); verify(playerCache).isAuthenticated(playerName); verifyZeroInteractions(dataSource); }
@Test public void shouldAllowUnrestrictedName() { String playerName = "Npc2"; Player player = mockPlayerWithName(playerName); EntityEvent event = mock(EntityEvent.class); given(event.getEntity()).willReturn(player); given(validationService.isUnrestricted(playerName)).willReturn(true); boolean result = listenerService.shouldCancelEvent(event); assertThat(result, equalTo(false)); verifyZeroInteractions(dataSource); }
@Test public void shouldAllowNpcPlayer() { String playerName = "other_npc"; Player player = mockPlayerWithName(playerName); EntityEvent event = mock(EntityEvent.class); given(event.getEntity()).willReturn(player); given(player.hasMetadata("NPC")).willReturn(true); boolean result = listenerService.shouldCancelEvent(event); assertThat(result, equalTo(false)); verify(player).hasMetadata("NPC"); }
@Test public void shouldHandlePlayerEvent() { String playerName = "example"; Player player = mockPlayerWithName(playerName); PlayerEvent event = new TestPlayerEvent(player); given(playerCache.isAuthenticated(playerName)).willReturn(true); boolean result = listenerService.shouldCancelEvent(event); assertThat(result, equalTo(false)); verify(playerCache).isAuthenticated(playerName); verifyZeroInteractions(dataSource); }
@Test public void shouldHandlePlayerEventWithNullPlayer() { PlayerEvent event = new TestPlayerEvent(null); boolean result = listenerService.shouldCancelEvent(event); assertThat(result, equalTo(false)); }
@Test public void shouldVerifyBasedOnPlayer() { String playerName = "player"; Player player = mockPlayerWithName(playerName); boolean result = listenerService.shouldCancelEvent(player); assertThat(result, equalTo(true)); verify(playerCache).isAuthenticated(playerName); verifyZeroInteractions(dataSource); }