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diff --git a/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiAvatarTests.cs b/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiAvatarTests.cs
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+++ b/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiAvatarTests.cs
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using System.Text;
+using log4net;
+using Nini.Config;
+using NUnit.Framework;
+using OpenMetaverse;
+using OpenMetaverse.Assets;
+using OpenMetaverse.StructuredData;
+using OpenSim.Framework;
+using OpenSim.Region.CoreModules.Avatar.AvatarFactory;
+using OpenSim.Region.OptionalModules.World.NPC;
+using OpenSim.Region.Framework.Scenes;
+using OpenSim.Region.ScriptEngine.Shared;
+using OpenSim.Region.ScriptEngine.Shared.Api;
+using OpenSim.Region.ScriptEngine.Shared.Instance;
+using OpenSim.Region.ScriptEngine.Shared.ScriptBase;
+using OpenSim.Services.Interfaces;
+using OpenSim.Tests.Common;
+using LSL_Integer = OpenSim.Region.ScriptEngine.Shared.LSL_Types.LSLInteger;
+using LSL_List = OpenSim.Region.ScriptEngine.Shared.LSL_Types.list;
+
+namespace OpenSim.Region.ScriptEngine.Shared.Tests
+{
+    /// <summary>
+    /// Tests relating directly to avatars
+    /// </summary>
+    [TestFixture]
+    public class LSL_ApiAvatarTests : OpenSimTestCase
+    {
+        protected Scene m_scene;
+        protected XEngine.XEngine m_engine;
+
+        [SetUp]
+        public override void SetUp()
+        {
+            base.SetUp();
+
+            IConfigSource initConfigSource = new IniConfigSource();
+            IConfig config = initConfigSource.AddConfig("XEngine");
+            config.Set("Enabled", "true");
+
+            m_scene = new SceneHelpers().SetupScene();
+            SceneHelpers.SetupSceneModules(m_scene, initConfigSource);
+
+            m_engine = new XEngine.XEngine();
+            m_engine.Initialise(initConfigSource);
+            m_engine.AddRegion(m_scene);
+        }
+
+        /// <summary>
+        /// Test llSetLinkPrimtiveParams for agents.
+        /// </summary>
+        /// <remarks>
+        /// Also testing entity updates here as well.  Possibly that's putting 2 different concerns into one test and
+        /// this should be separated.
+        /// </remarks>
+        [Test]
+        public void TestllSetLinkPrimitiveParamsForAgent()
+        {
+            TestHelpers.InMethod();
+//            TestHelpers.EnableLogging();
+
+            UUID userId = TestHelpers.ParseTail(0x1);
+
+            SceneObjectPart part = SceneHelpers.AddSceneObject(m_scene).RootPart;
+            part.RotationOffset = new Quaternion(0.7071068f, 0, 0, 0.7071068f);
+
+            LSL_Api apiGrp1 = new LSL_Api();
+            apiGrp1.Initialize(m_engine, part, null);
+
+            ScenePresence sp = SceneHelpers.AddScenePresence(m_scene, userId);
+
+            // sp has to be less than 10 meters away from 0, 0, 0 (default part position)
+            Vector3 startPos = new Vector3(3, 2, 1);
+            sp.AbsolutePosition = startPos;
+
+            sp.HandleAgentRequestSit(sp.ControllingClient, sp.UUID, part.UUID, Vector3.Zero);
+
+            int entityUpdates = 0;
+            ((TestClient)sp.ControllingClient).OnReceivedEntityUpdate += (entity, flags) => { if (entity is ScenePresence) { entityUpdates++; }};
+
+            // Test position
+            {
+                Vector3 newPos = new Vector3(1, 2, 3);
+                apiGrp1.llSetLinkPrimitiveParams(2, new LSL_Types.list(ScriptBaseClass.PRIM_POSITION, newPos));
+
+                Assert.That(sp.OffsetPosition, Is.EqualTo(newPos));
+
+                m_scene.Update(1);
+                Assert.That(entityUpdates, Is.EqualTo(1));
+            }
+
+            // Test small reposition
+            {
+                Vector3 newPos = new Vector3(1.001f, 2, 3);
+                apiGrp1.llSetLinkPrimitiveParams(2, new LSL_Types.list(ScriptBaseClass.PRIM_POSITION, newPos));
+
+                Assert.That(sp.OffsetPosition, Is.EqualTo(newPos));
+
+                m_scene.Update(1);
+                Assert.That(entityUpdates, Is.EqualTo(2));
+            }
+
+            // Test world rotation
+            {
+                Quaternion newRot = new Quaternion(0, 0.7071068f, 0, 0.7071068f);
+                apiGrp1.llSetLinkPrimitiveParams(2, new LSL_Types.list(ScriptBaseClass.PRIM_ROTATION, newRot));
+
+                Assert.That(
+                    sp.Rotation, new QuaternionToleranceConstraint(part.GetWorldRotation() * newRot, 0.000001));
+
+                m_scene.Update(1);
+                Assert.That(entityUpdates, Is.EqualTo(3));
+            }
+
+            // Test local rotation
+            {
+                Quaternion newRot = new Quaternion(0, 0.7071068f, 0, 0.7071068f);
+                apiGrp1.llSetLinkPrimitiveParams(2, new LSL_Types.list(ScriptBaseClass.PRIM_ROT_LOCAL, newRot));
+
+                Assert.That(
+                    sp.Rotation, new QuaternionToleranceConstraint(newRot, 0.000001));
+
+                m_scene.Update(1);
+                Assert.That(entityUpdates, Is.EqualTo(4));
+            }
+        }
+    }
+}