#830 Write tests for registration process

src/main/java/fr/xephi/authme/process/register/executors/PasswordRegisterExecutorProvider.java

@@ -20,7 +20,9 @@ import javax.inject.Inject;
 
 import static fr.xephi.authme.process.register.executors.PlayerAuthBuilderHelper.createPlayerAuth;
 
-
+/**
+ * Provides registration executors for password-based registration variants.
+ */
 class PasswordRegisterExecutorProvider {
 
     /**

src/main/java/fr/xephi/authme/process/register/executors/PlayerAuthBuilderHelper.java

@@ -10,6 +10,9 @@ import org.bukkit.entity.Player;
  */
 final class PlayerAuthBuilderHelper {
 
+    private PlayerAuthBuilderHelper() {
+    }
+
     static PlayerAuth createPlayerAuth(Player player, HashedPassword hashedPassword, String email) {
         return PlayerAuth.builder()
             .name(player.getName().toLowerCase())
@@ -20,7 +23,4 @@ final class PlayerAuthBuilderHelper {
             .location(player.getLocation())
             .build();
     }
-
-
-
 }

src/main/java/fr/xephi/authme/process/register/executors/RegistrationExecutor.java

@@ -10,6 +10,9 @@ public interface RegistrationExecutor {
     /**
      * Returns whether the registration may take place. Use this method to execute
      * checks specific to the registration method.
+     * <p>
+     * If this method returns {@code false}, it is expected that the executor inform
+     * the player about the error within this method call.
      *
      * @return true if registration may be performed, false otherwise
      */