#844 Run PurgeTask as repeating task and #784 write tests for PurgeTask

src/main/java/fr/xephi/authme/task/purge/PurgeExecutor.java

@@ -49,7 +49,7 @@ class PurgeExecutor {
      * players and names.
      *
      * @param players the players to purge
-     * @param names names to purge (lowercase)
+     * @param names names to purge
      */
     public void executePurge(Collection<OfflinePlayer> players, Collection<String> names) {
         // Purge other data

src/main/java/fr/xephi/authme/task/purge/PurgeService.java

@@ -91,7 +91,7 @@ public class PurgeService {
 
         isPurging = true;
         PurgeTask purgeTask = new PurgeTask(this, permissionsManager, sender, names, players);
-        bukkitService.runTaskAsynchronously(purgeTask);
+        bukkitService.runTaskTimer(purgeTask, 0, 1);
     }
 
     /**

src/main/java/fr/xephi/authme/task/purge/PurgeTask.java

@@ -104,9 +104,9 @@ class PurgeTask extends BukkitRunnable {
         cancel();
 
         // Show a status message
-        sendMessage(ChatColor.GREEN + "[AuthMe] Database has been purged correctly");
+        sendMessage(ChatColor.GREEN + "[AuthMe] Database has been purged successfully");
 
-        ConsoleLogger.info("Purge Finished!");
+        ConsoleLogger.info("Purge finished!");
         purgeService.setPurging(false);
     }
 

src/main/java/fr/xephi/authme/util/BukkitService.java

@@ -9,6 +9,9 @@ import org.bukkit.OfflinePlayer;
 import org.bukkit.World;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Event;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.scheduler.BukkitRunnable;
+import org.bukkit.scheduler.BukkitScheduler;
 import org.bukkit.scheduler.BukkitTask;
 
 import javax.inject.Inject;
@@ -123,6 +126,22 @@ public class BukkitService {
         return Bukkit.getScheduler().runTaskLaterAsynchronously(authMe, task, delay);
     }
 
+    /**
+     * Schedules the given task to repeatedly run until cancelled, starting after the
+     * specified number of server ticks.
+     *
+     * @param task the task to schedule
+     * @param delay the ticks to wait before running the task
+     * @param period the ticks to wait between runs
+     * @return a BukkitTask that contains the id number
+     * @throws IllegalArgumentException if plugin is null
+     * @throws IllegalStateException if this was already scheduled
+     * @see BukkitScheduler#runTaskTimer(Plugin, Runnable, long, long)
+     */
+    public BukkitTask runTaskTimer(BukkitRunnable task, long delay, long period) {
+        return task.runTaskTimer(authMe, period, delay);
+    }
+
     /**
      * Broadcast a message to all players.
      *