hitbox audio service bugfixes

src/main/java/electrosphere/audio/collision/HitboxAudioService.java

@@ -63,7 +63,7 @@ public class HitboxAudioService {
      */
     public void playAudioPositional(Entity senderEntity, Entity receiverEntity, String hitboxType, String hurtboxType, Vector3d position){
         String audioPath = this.getAudioPath(senderEntity, receiverEntity, hitboxType, hurtboxType);
-        if(audioPath != null){
+        if(audioPath != null && Globals.virtualAudioSourceManager != null){
             Globals.virtualAudioSourceManager.createVirtualAudioSource(audioPath, VirtualAudioSourceType.CREATURE, false, position);
         }
     }
@@ -76,9 +76,12 @@ public class HitboxAudioService {
      * @param hurtboxType The hurthox type
      * @return The audio file to play
      */
-    private String getAudioPath(Entity senderEntity, Entity receiverEntity, String hitboxType, String hurtboxType){
+    protected String getAudioPath(Entity senderEntity, Entity receiverEntity, String hitboxType, String hurtboxType){
         boolean isBlockSound = false;
         boolean isDamageSound = false;
+        if(hitboxType == null){
+            return null;
+        }
         switch(hitboxType){
             case HitboxData.HITBOX_TYPE_HIT:
             case HitboxData.HITBOX_TYPE_HIT_CONNECTED: {

src/test/java/electrosphere/audio/collision/HitboxAudioServiceUnitTests.java

@@ -0,0 +1,29 @@
+package electrosphere.audio.collision;
+
+import org.junit.jupiter.api.Assertions;
+
+import annotations.FastTest;
+import annotations.UnitTest;
+
+/**
+ * Unit tests for hitbox audio service
+ */
+public class HitboxAudioServiceUnitTests {
+    
+    @UnitTest
+    @FastTest
+    public void playAudioPositional_WithNull_NoThrow(){
+        HitboxAudioService hitboxAudioService = new HitboxAudioService();
+        Assertions.assertDoesNotThrow(() -> {
+            hitboxAudioService.playAudioPositional(null, null, null, null, null);
+        });
+    }
+
+    @UnitTest
+    @FastTest
+    public void getAudioPath_WithNullHitboxType_ReturnsNull(){
+        HitboxAudioService hitboxAudioService = new HitboxAudioService();
+        Assertions.assertEquals(null, hitboxAudioService.getAudioPath(null, null, null, null));
+    }
+
+}