#930 Registration captcha: update message shown to player on failed captcha

- Show message with new captcha code when a captcha has failed
- Requires implementation of circular dependency handler (initial draft)

src/test/java/fr/xephi/authme/AuthMeInitializationTest.java

@@ -6,8 +6,11 @@ import ch.jalu.injector.InjectorBuilder;
 import com.google.common.io.Files;
 import fr.xephi.authme.api.v3.AuthMeApi;
 import fr.xephi.authme.command.CommandHandler;
+import fr.xephi.authme.data.RegistrationCaptchaManager;
+import fr.xephi.authme.data.limbo.LimboService;
 import fr.xephi.authme.datasource.DataSource;
 import fr.xephi.authme.initialization.DataFolder;
+import fr.xephi.authme.initialization.circulardependency.CircularDependencyInitializer;
 import fr.xephi.authme.listener.BlockListener;
 import fr.xephi.authme.permission.PermissionsManager;
 import fr.xephi.authme.process.Management;
@@ -39,6 +42,7 @@ import java.util.logging.Logger;
 import static fr.xephi.authme.settings.properties.AuthMeSettingsRetriever.buildConfigurationData;
 import static org.hamcrest.Matchers.not;
 import static org.hamcrest.Matchers.nullValue;
+import static org.hamcrest.Matchers.sameInstance;
 import static org.junit.Assert.assertThat;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.mock;
@@ -108,6 +112,7 @@ public class AuthMeInitializationTest {
         // when
         authMe.instantiateServices(injector);
         authMe.registerEventListeners(injector);
+        injector.newInstance(CircularDependencyInitializer.class).initializeCircularDependencies();
 
         // then
         // Take a few samples and ensure that they are not null
@@ -121,6 +126,17 @@ public class AuthMeInitializationTest {
         assertThat(injector.getIfAvailable(PermissionsManager.class), not(nullValue()));
         assertThat(injector.getIfAvailable(ProcessSyncPlayerLogin.class), not(nullValue()));
         assertThat(injector.getIfAvailable(PurgeService.class), not(nullValue()));
+
+        assertCircularDependencyWasSet(injector);
     }
 
+    private void assertCircularDependencyWasSet(Injector injector) {
+        RegistrationCaptchaManager registrationCaptchaManager = injector.getIfAvailable(RegistrationCaptchaManager.class);
+        LimboService limboServiceOnCaptchaManager = ReflectionTestUtils.getFieldValue(
+            RegistrationCaptchaManager.class, registrationCaptchaManager, "limboService");
+        LimboService limboServiceFromInjector = injector.getIfAvailable(LimboService.class);
+
+        assertThat(limboServiceOnCaptchaManager, not(nullValue()));
+        assertThat(limboServiceOnCaptchaManager, sameInstance(limboServiceFromInjector));
+    }
 }