2 files changed, 351 insertions, 143 deletions

diff --git a/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs b/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
index a0a7a68..296f198 100644
--- a/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
@@ -304,21 +304,34 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
             if (!Enabled)
                 return false;
 
-            if (AttachObjectInternal(sp, group, attachmentPt, silent, useAttachData, temp, append))
-            {
-                m_scene.EventManager.TriggerOnAttach(group.LocalId, group.FromItemID, sp.UUID);
-                return true;
-            }
-
-            return false;
+            AttachObjectInternal(sp, group, attachmentPt, silent, useAttachData, temp, append);
         }
-        
+
+        /// <summary>
+        /// Internal method which actually does all the work for attaching an object.
+        /// </summary>
+        /// <returns>The object attached.</returns>
+        /// <param name='sp'></param>
+        /// <param name='group'>The object to attach.</param>
+        /// <param name='attachmentPt'></param>
+        /// <param name='silent'></param>
+        /// <param name='temp'></param>
+        /// <param name='resumeScripts'>If true then scripts are resumed on the attached object.</param>
         private bool AttachObjectInternal(IScenePresence sp, SceneObjectGroup group, uint attachmentPt, bool silent, bool useAttachData, bool temp, bool append)
         {
 //                m_log.DebugFormat(
 //                    "[ATTACHMENTS MODULE]: Attaching object {0} {1} to {2} point {3} from ground (silent = {4})",
 //                    group.Name, group.LocalId, sp.Name, attachmentPt, silent);
 
+            if (sp.GetAttachments().Contains(group))
+            {
+//                m_log.WarnFormat(
+//                    "[ATTACHMENTS MODULE]: Ignoring request to attach {0} {1} to {2} on {3} since it's already attached",
+//                    group.Name, group.LocalId, sp.Name, AttachmentPt);
+
+                return false;
+            }
+
             if (group.GetSittingAvatarsCount() != 0)
             {
 //                    m_log.WarnFormat(
@@ -328,67 +341,57 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                 return false;
             }
 
-            if (sp.GetAttachments(attachmentPt).Contains(group))
+            Vector3 attachPos = group.AbsolutePosition;
+
+            // TODO: this short circuits multiple attachments functionality  in  LL viewer 2.1+ and should
+            // be removed when that functionality is implemented in opensim
+            attachmentPt &= 0x7f;
+            
+            // If the attachment point isn't the same as the one previously used
+            // set it's offset position = 0 so that it appears on the attachment point
+            // and not in a weird location somewhere unknown.
+            if (attachmentPt != (uint)AttachmentPoint.Default && attachmentPt != group.AttachmentPoint)
             {
-//                m_log.WarnFormat(
-//                    "[ATTACHMENTS MODULE]: Ignoring request to attach {0} {1} to {2} on {3} since it's already attached",
-//                    group.Name, group.LocalId, sp.Name, AttachmentPt);
+                attachPos = Vector3.Zero;
+            }
 
-                return false;
+            // AttachmentPt 0 (default) means the client chose to 'wear' the attachment.
+            if (attachmentPt == (uint)AttachmentPoint.Default)
+            {
+                // Check object for stored attachment point
+                attachmentPt = group.AttachmentPoint;
             }
 
-            // Remove any previous attachments
-            List<SceneObjectGroup> existingAttachments = sp.GetAttachments(attachmentPt);
+            // if we still didn't find a suitable attachment point.......
+            if (attachmentPt == 0)
+            {
+                // Stick it on left hand with Zero Offset from the attachment point.
+                attachmentPt = (uint)AttachmentPoint.LeftHand;
+                attachPos = Vector3.Zero;
+            }
 
-            // At the moment we can only deal with a single attachment
-            if (existingAttachments.Count != 0 && existingAttachments[0].FromItemID != UUID.Zero)
-                DetachSingleAttachmentToInv(sp, group);
+            List<SceneObjectGroup> attachments = sp.GetAttachments(attachmentPt);
 
-            lock (sp.AttachmentsSyncLock)
+            // If we already have 5, remove the oldest until only 4 are left. Skip over temp ones
+            while (attachments.Count >= 5)
             {
-                Vector3 attachPos = group.AbsolutePosition;
-    
-                // If the attachment point isn't the same as the one previously used
-                // set it's offset position = 0 so that it appears on the attachment point
-                // and not in a weird location somewhere unknown.
-                if (attachmentPt != 0 && attachmentPt != group.AttachmentPoint)
-                {
-                    attachPos = Vector3.Zero;
-                }
+                if (attachments[0].FromItemID != UUID.Zero)
+                    DetachSingleAttachmentToInv(sp, attachments[0]);
+                attachments.RemoveAt(0);
+            }
 
-                // AttachmentPt 0 means the client chose to 'wear' the attachment.
-                if (attachmentPt == 0)
+            // If we're not appending, remove the rest as well
+            if (attachments.Count != 0 && !append)
+            {
+                foreach (SceneObjectGroup g in attachments)
                 {
-                    // Check object for stored attachment point
-                    attachmentPt = group.AttachmentPoint;
+                    if (g.FromItemID != UUID.Zero)
+                        DetachSingleAttachmentToInv(sp, g);
                 }
+            }
 
-                // if we still didn't find a suitable attachment point.......
-                if (attachmentPt == 0)
-                {
-                    // Stick it on left hand with Zero Offset from the attachment point.
-                    attachmentPt = (uint)AttachmentPoint.LeftHand;
-                    attachPos = Vector3.Zero;
-                }
-    
-                if (useAttachData)
-                {
-                    group.RootPart.RotationOffset = group.RootPart.AttachRotation;
-                    attachPos = group.RootPart.AttachOffset;
-                    if (attachmentPt == 0)
-                    {
-                        attachmentPt = group.RootPart.AttachPoint;
-                        if (attachmentPt == 0)
-                        {
-                            attachmentPt = (uint)AttachmentPoint.LeftHand;
-                            attachPos = Vector3.Zero;
-                        }
-                    }
-                    else if (group.RootPart.AttachPoint != attachmentPt)
-                    {
-                        attachPos = Vector3.Zero;
-                    }
-                }
+            lock (sp.AttachmentsSyncLock)
+            {
                 group.AttachmentPoint = attachmentPt;
                 group.AbsolutePosition = attachPos;
 
@@ -396,6 +399,17 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                     UpdateUserInventoryWithAttachment(sp, group, attachmentPt, temp, append);
     
                 AttachToAgent(sp, group, attachmentPt, attachPos, silent);
+
+                if (resumeScripts)
+                {
+                    // Fire after attach, so we don't get messy perms dialogs
+                    // 4 == AttachedRez
+                    group.CreateScriptInstances(0, true, m_scene.DefaultScriptEngine, 4);
+                    group.ResumeScripts();
+                }
+
+                // Do this last so that event listeners have access to all the effects of the attachment
+                m_scene.EventManager.TriggerOnAttach(group.LocalId, group.FromItemID, sp.UUID);
             }
 
             return true;
@@ -425,8 +439,8 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                 return null;
 
 //            m_log.DebugFormat(
-//                "[ATTACHMENTS MODULE]: RezSingleAttachmentFromInventory to point {0} from item {1} for {2}",
-//                (AttachmentPoint)AttachmentPt, itemID, sp.Name);
+//                "[ATTACHMENTS MODULE]: RezSingleAttachmentFromInventory to point {0} from item {1} for {2} in {3}",
+//                (AttachmentPoint)AttachmentPt, itemID, sp.Name, m_scene.Name);
 
             bool append = (AttachmentPt & 0x80) != 0;
             AttachmentPt &= 0x7f;
@@ -558,6 +572,10 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                 return;
             }
 
+//            m_log.DebugFormat(
+//                "[ATTACHMENTS MODULE]: Detaching object {0} {1} for {2} in {3}", 
+//                so.Name, so.LocalId, sp.Name, m_scene.Name);
+
             // Scripts MUST be snapshotted before the object is
             // removed from the scene because doing otherwise will
             // clobber the run flag
@@ -879,79 +897,44 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments
                 return null;
             }
 
-            List<SceneObjectGroup> attachments = sp.GetAttachments(attachmentPt);
-
-            // If we already have 5, remove the oldest until only 4 are left. Skip over temp ones
-            while (attachments.Count >= 5)
-            {
-                if (attachments[0].FromItemID != UUID.Zero)
-                    DetachSingleAttachmentToInv(sp, attachments[0]);
-                attachments.RemoveAt(0);
-            }
-
-            // If we're not appending, remove the rest as well
-            if (attachments.Count != 0 && !append)
-            {
-                foreach (SceneObjectGroup g in attachments)
-                {
-                    if (g.FromItemID != UUID.Zero)
-                        DetachSingleAttachmentToInv(sp, g);
-                }
-            }
-
-            lock (sp.AttachmentsSyncLock)
+            // HasGroupChanged is being set from within RezObject.  Ideally it would be set by the caller.
+            objatt.HasGroupChanged = false;
+            bool tainted = false;
+            if (attachmentPt != 0 && attachmentPt != objatt.AttachmentPoint)
+                tainted = true;
+
+            // FIXME: Detect whether it's really likely for AttachObject to throw an exception in the normal
+            // course of events.  If not, then it's probably not worth trying to recover the situation
+            // since this is more likely to trigger further exceptions and confuse later debugging.  If
+            // exceptions can be thrown in expected error conditions (not NREs) then make this consistent
+            // since other normal error conditions will simply return false instead.
+            // This will throw if the attachment fails
+            try
             {
-//                    m_log.DebugFormat(
-//                        "[ATTACHMENTS MODULE]: Rezzed single object {0} for attachment to {1} on point {2} in {3}",
-//                        objatt.Name, sp.Name, attachmentPt, m_scene.Name);
-
-                // HasGroupChanged is being set from within RezObject.  Ideally it would be set by the caller.
-                objatt.HasGroupChanged = false;
-                bool tainted = false;
-                if (attachmentPt != 0 && attachmentPt != objatt.AttachmentPoint)
-                    tainted = true;
-
-                // FIXME: Detect whether it's really likely for AttachObject to throw an exception in the normal
-                // course of events.  If not, then it's probably not worth trying to recover the situation
-                // since this is more likely to trigger further exceptions and confuse later debugging.  If
-                // exceptions can be thrown in expected error conditions (not NREs) then make this consistent
-                // since other normal error conditions will simply return false instead.
-                // This will throw if the attachment fails
-                try
-                {
-                    AttachObjectInternal(sp, objatt, attachmentPt, false, false, false, append);
-                }
-                catch (Exception e)
-                {
-                    m_log.ErrorFormat(
-                        "[ATTACHMENTS MODULE]: Failed to attach {0} {1} for {2}, exception {3}{4}",
-                        objatt.Name, objatt.UUID, sp.Name, e.Message, e.StackTrace);
-
-                    // Make sure the object doesn't stick around and bail
-                    sp.RemoveAttachment(objatt);
-                    m_scene.DeleteSceneObject(objatt, false);
-                    return null;
-                }
-
-                if (tainted)
-                    objatt.HasGroupChanged = true;
-
                 if (doc != null)
                 {
                     objatt.LoadScriptState(doc);
                     objatt.ResetOwnerChangeFlag();
                 }
 
-                // Fire after attach, so we don't get messy perms dialogs
-                // 4 == AttachedRez
-                objatt.CreateScriptInstances(0, true, m_scene.DefaultScriptEngine, 4);
-                objatt.ResumeScripts();
-
-                // Do this last so that event listeners have access to all the effects of the attachment
-                m_scene.EventManager.TriggerOnAttach(objatt.LocalId, itemID, sp.UUID);
+                AttachObjectInternal(sp, objatt, attachmentPt, false, true, false, append);
+            }
+            catch (Exception e)
+            {
+                m_log.ErrorFormat(
+                    "[ATTACHMENTS MODULE]: Failed to attach {0} {1} for {2}, exception {3}{4}",
+                    objatt.Name, objatt.UUID, sp.Name, e.Message, e.StackTrace);
 
-                return objatt;
+                // Make sure the object doesn't stick around and bail
+                sp.RemoveAttachment(objatt);
+                m_scene.DeleteSceneObject(objatt, false);
+                return null;
             }
+
+            if (tainted)
+                objatt.HasGroupChanged = true;
+
+            return objatt;
         }
 
         /// <summary>
diff --git a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
index 545aeda..da4bc83 100644
--- a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
@@ -228,6 +228,120 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
             Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(1));
         }
 
+        [Test]
+        public void TestWearAttachmentFromGround()
+        {
+            TestHelpers.InMethod();
+//            TestHelpers.EnableLogging();
+
+            Scene scene = CreateTestScene();
+            UserAccount ua1 = UserAccountHelpers.CreateUserWithInventory(scene, 0x1);
+            ScenePresence sp = SceneHelpers.AddScenePresence(scene, ua1);
+
+            SceneObjectGroup so2 = SceneHelpers.AddSceneObject(scene, "att2", sp.UUID);
+
+            {
+                SceneObjectGroup so = SceneHelpers.AddSceneObject(scene, "att1", sp.UUID);
+
+                m_numberOfAttachEventsFired = 0;
+                scene.AttachmentsModule.AttachObject(sp, so, (uint)AttachmentPoint.Default, false, false);
+
+                // Check status on scene presence
+                Assert.That(sp.HasAttachments(), Is.True);
+                List<SceneObjectGroup> attachments = sp.GetAttachments();
+                Assert.That(attachments.Count, Is.EqualTo(1));
+                SceneObjectGroup attSo = attachments[0];
+                Assert.That(attSo.Name, Is.EqualTo(so.Name));
+                Assert.That(attSo.AttachmentPoint, Is.EqualTo((byte)AttachmentPoint.LeftHand));
+                Assert.That(attSo.IsAttachment);
+                Assert.That(attSo.UsesPhysics, Is.False);
+                Assert.That(attSo.IsTemporary, Is.False);
+
+                // Check item status
+                Assert.That(
+                    sp.Appearance.GetAttachpoint(attSo.FromItemID),
+                    Is.EqualTo((int)AttachmentPoint.LeftHand));
+
+                InventoryItemBase attachmentItem = scene.InventoryService.GetItem(new InventoryItemBase(attSo.FromItemID));
+                Assert.That(attachmentItem, Is.Not.Null);
+                Assert.That(attachmentItem.Name, Is.EqualTo(so.Name));
+
+                InventoryFolderBase targetFolder = scene.InventoryService.GetFolderForType(sp.UUID, AssetType.Object);
+                Assert.That(attachmentItem.Folder, Is.EqualTo(targetFolder.ID));
+
+                Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(2));
+
+                // Check events
+                Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(1));
+            }
+
+            // Test wearing a different attachment from the ground.
+            {
+                scene.AttachmentsModule.AttachObject(sp, so2, (uint)AttachmentPoint.Default, false, false);
+
+                // Check status on scene presence
+                Assert.That(sp.HasAttachments(), Is.True);
+                List<SceneObjectGroup> attachments = sp.GetAttachments();
+                Assert.That(attachments.Count, Is.EqualTo(1));
+                SceneObjectGroup attSo = attachments[0];
+                Assert.That(attSo.Name, Is.EqualTo(so2.Name));
+                Assert.That(attSo.AttachmentPoint, Is.EqualTo((byte)AttachmentPoint.LeftHand));
+                Assert.That(attSo.IsAttachment);
+                Assert.That(attSo.UsesPhysics, Is.False);
+                Assert.That(attSo.IsTemporary, Is.False);
+
+                // Check item status
+                Assert.That(
+                    sp.Appearance.GetAttachpoint(attSo.FromItemID),
+                    Is.EqualTo((int)AttachmentPoint.LeftHand));
+
+                InventoryItemBase attachmentItem = scene.InventoryService.GetItem(new InventoryItemBase(attSo.FromItemID));
+                Assert.That(attachmentItem, Is.Not.Null);
+                Assert.That(attachmentItem.Name, Is.EqualTo(so2.Name));
+
+                InventoryFolderBase targetFolder = scene.InventoryService.GetFolderForType(sp.UUID, AssetType.Object);
+                Assert.That(attachmentItem.Folder, Is.EqualTo(targetFolder.ID));
+
+                Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
+
+                // Check events
+                Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(3));
+            }
+
+            // Test rewearing an already worn attachment from ground.  Nothing should happen.
+            {
+                scene.AttachmentsModule.AttachObject(sp, so2, (uint)AttachmentPoint.Default, false, false);
+
+                // Check status on scene presence
+                Assert.That(sp.HasAttachments(), Is.True);
+                List<SceneObjectGroup> attachments = sp.GetAttachments();
+                Assert.That(attachments.Count, Is.EqualTo(1));
+                SceneObjectGroup attSo = attachments[0];
+                Assert.That(attSo.Name, Is.EqualTo(so2.Name));
+                Assert.That(attSo.AttachmentPoint, Is.EqualTo((byte)AttachmentPoint.LeftHand));
+                Assert.That(attSo.IsAttachment);
+                Assert.That(attSo.UsesPhysics, Is.False);
+                Assert.That(attSo.IsTemporary, Is.False);
+
+                // Check item status
+                Assert.That(
+                    sp.Appearance.GetAttachpoint(attSo.FromItemID),
+                    Is.EqualTo((int)AttachmentPoint.LeftHand));
+
+                InventoryItemBase attachmentItem = scene.InventoryService.GetItem(new InventoryItemBase(attSo.FromItemID));
+                Assert.That(attachmentItem, Is.Not.Null);
+                Assert.That(attachmentItem.Name, Is.EqualTo(so2.Name));
+
+                InventoryFolderBase targetFolder = scene.InventoryService.GetFolderForType(sp.UUID, AssetType.Object);
+                Assert.That(attachmentItem.Folder, Is.EqualTo(targetFolder.ID));
+
+                Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
+
+                // Check events
+                Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(3));
+            }
+        }
+
         /// <summary>
         /// Test that we do not attempt to attach an in-world object that someone else is sitting on.
         /// </summary>
@@ -275,29 +389,140 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
 
             InventoryItemBase attItem = CreateAttachmentItem(scene, ua1.PrincipalID, "att", 0x10, 0x20);
 
-            m_numberOfAttachEventsFired = 0;
-            scene.AttachmentsModule.RezSingleAttachmentFromInventory(
-                sp, attItem.ID, (uint)AttachmentPoint.Chest);
+            {
+                scene.AttachmentsModule.RezSingleAttachmentFromInventory(
+                    sp, attItem.ID, (uint)AttachmentPoint.Chest);
 
-            // Check scene presence status
-            Assert.That(sp.HasAttachments(), Is.True);
-            List<SceneObjectGroup> attachments = sp.GetAttachments();
-            Assert.That(attachments.Count, Is.EqualTo(1));
-            SceneObjectGroup attSo = attachments[0];
-            Assert.That(attSo.Name, Is.EqualTo(attItem.Name));
-            Assert.That(attSo.AttachmentPoint, Is.EqualTo((byte)AttachmentPoint.Chest));
-            Assert.That(attSo.IsAttachment);
-            Assert.That(attSo.UsesPhysics, Is.False);
-            Assert.That(attSo.IsTemporary, Is.False);
+                // Check scene presence status
+                Assert.That(sp.HasAttachments(), Is.True);
+                List<SceneObjectGroup> attachments = sp.GetAttachments();
+                Assert.That(attachments.Count, Is.EqualTo(1));
+                SceneObjectGroup attSo = attachments[0];
+                Assert.That(attSo.Name, Is.EqualTo(attItem.Name));
+                Assert.That(attSo.AttachmentPoint, Is.EqualTo((byte)AttachmentPoint.Chest));
+                Assert.That(attSo.IsAttachment);
+                Assert.That(attSo.UsesPhysics, Is.False);
+                Assert.That(attSo.IsTemporary, Is.False);
+
+                // Check appearance status
+                Assert.That(sp.Appearance.GetAttachments().Count, Is.EqualTo(1));
+                Assert.That(sp.Appearance.GetAttachpoint(attItem.ID), Is.EqualTo((int)AttachmentPoint.Chest));
+                Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
+
+                // Check events
+                Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(1));
+            }
+
+            // Test attaching an already attached attachment
+            {
+                scene.AttachmentsModule.RezSingleAttachmentFromInventory(
+                    sp, attItem.ID, (uint)AttachmentPoint.Chest);
 
-            // Check appearance status
-            Assert.That(sp.Appearance.GetAttachments().Count, Is.EqualTo(1));
-            Assert.That(sp.Appearance.GetAttachpoint(attItem.ID), Is.EqualTo((int)AttachmentPoint.Chest));
+                // Check scene presence status
+                Assert.That(sp.HasAttachments(), Is.True);
+                List<SceneObjectGroup> attachments = sp.GetAttachments();
+                Assert.That(attachments.Count, Is.EqualTo(1));
+                SceneObjectGroup attSo = attachments[0];
+                Assert.That(attSo.Name, Is.EqualTo(attItem.Name));
+                Assert.That(attSo.AttachmentPoint, Is.EqualTo((byte)AttachmentPoint.Chest));
+                Assert.That(attSo.IsAttachment);
+                Assert.That(attSo.UsesPhysics, Is.False);
+                Assert.That(attSo.IsTemporary, Is.False);
+
+                // Check appearance status
+                Assert.That(sp.Appearance.GetAttachments().Count, Is.EqualTo(1));
+                Assert.That(sp.Appearance.GetAttachpoint(attItem.ID), Is.EqualTo((int)AttachmentPoint.Chest));
+                Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
+
+                // Check events
+                Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(1));
+            }
+        }
 
-            Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
+        /// <summary>
+        /// Test wearing an attachment from inventory, as opposed to explicit choosing the rez point
+        /// </summary>
+        [Test]
+        public void TestWearAttachmentFromInventory()
+        {
+            TestHelpers.InMethod();
+//            TestHelpers.EnableLogging();
 
-            // Check events
-            Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(1));
+            Scene scene = CreateTestScene();
+            UserAccount ua1 = UserAccountHelpers.CreateUserWithInventory(scene, 0x1);
+            ScenePresence sp = SceneHelpers.AddScenePresence(scene, ua1.PrincipalID);
+
+            InventoryItemBase attItem1 = CreateAttachmentItem(scene, ua1.PrincipalID, "att1", 0x10, 0x20);
+            InventoryItemBase attItem2 = CreateAttachmentItem(scene, ua1.PrincipalID, "att2", 0x11, 0x21);
+
+            {
+                m_numberOfAttachEventsFired = 0;
+                scene.AttachmentsModule.RezSingleAttachmentFromInventory(sp, attItem1.ID, (uint)AttachmentPoint.Default);
+
+                // default attachment point is currently the left hand.
+                Assert.That(sp.HasAttachments(), Is.True);
+                List<SceneObjectGroup> attachments = sp.GetAttachments();
+                Assert.That(attachments.Count, Is.EqualTo(1));
+                SceneObjectGroup attSo = attachments[0];
+                Assert.That(attSo.Name, Is.EqualTo(attItem1.Name));
+                Assert.That(attSo.AttachmentPoint, Is.EqualTo((byte)AttachmentPoint.LeftHand));
+                Assert.That(attSo.IsAttachment);
+
+                // Check appearance status
+                Assert.That(sp.Appearance.GetAttachments().Count, Is.EqualTo(1));
+                Assert.That(sp.Appearance.GetAttachpoint(attItem1.ID), Is.EqualTo((int)AttachmentPoint.LeftHand));
+                Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
+
+                // Check events
+                Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(1));
+            }
+
+            // Test wearing a second attachment at the same position
+            // Until multiple attachments at one point is implemented, this will remove the first attachment
+            // This test relies on both attachments having the same default attachment point (in this case LeftHand 
+            // since none other has been set).
+            {
+                scene.AttachmentsModule.RezSingleAttachmentFromInventory(sp, attItem2.ID, (uint)AttachmentPoint.Default);
+
+                // default attachment point is currently the left hand.
+                Assert.That(sp.HasAttachments(), Is.True);
+                List<SceneObjectGroup> attachments = sp.GetAttachments();
+                Assert.That(attachments.Count, Is.EqualTo(1));
+                SceneObjectGroup attSo = attachments[0];
+                Assert.That(attSo.Name, Is.EqualTo(attItem2.Name));
+                Assert.That(attSo.AttachmentPoint, Is.EqualTo((byte)AttachmentPoint.LeftHand));
+                Assert.That(attSo.IsAttachment);
+
+                // Check appearance status
+                Assert.That(sp.Appearance.GetAttachments().Count, Is.EqualTo(1));
+                Assert.That(sp.Appearance.GetAttachpoint(attItem2.ID), Is.EqualTo((int)AttachmentPoint.LeftHand));
+                Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
+
+                // Check events
+                Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(3));
+            }
+
+            // Test wearing an already attached attachment
+            {
+                scene.AttachmentsModule.RezSingleAttachmentFromInventory(sp, attItem2.ID, (uint)AttachmentPoint.Default);
+
+                // default attachment point is currently the left hand.
+                Assert.That(sp.HasAttachments(), Is.True);
+                List<SceneObjectGroup> attachments = sp.GetAttachments();
+                Assert.That(attachments.Count, Is.EqualTo(1));
+                SceneObjectGroup attSo = attachments[0];
+                Assert.That(attSo.Name, Is.EqualTo(attItem2.Name));
+                Assert.That(attSo.AttachmentPoint, Is.EqualTo((byte)AttachmentPoint.LeftHand));
+                Assert.That(attSo.IsAttachment);
+
+                // Check appearance status
+                Assert.That(sp.Appearance.GetAttachments().Count, Is.EqualTo(1));
+                Assert.That(sp.Appearance.GetAttachpoint(attItem2.ID), Is.EqualTo((int)AttachmentPoint.LeftHand));
+                Assert.That(scene.GetSceneObjectGroups().Count, Is.EqualTo(1));
+
+                // Check events
+                Assert.That(m_numberOfAttachEventsFired, Is.EqualTo(3));
+            }
         }
 
         /// <summary>