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diff --git a/indra/llcommon/tests/llinstancetracker_test.cpp b/indra/llcommon/tests/llinstancetracker_test.cpp
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index 0000000000..7415f2d33b
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+++ b/indra/llcommon/tests/llinstancetracker_test.cpp
@@ -0,0 +1,160 @@
+/**
+ * @file   llinstancetracker_test.cpp
+ * @author Nat Goodspeed
+ * @date   2009-11-10
+ * @brief  Test for llinstancetracker.
+ * 
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * Copyright (c) 2009, Linden Research, Inc.
+ * $/LicenseInfo$
+ */
+
+// Precompiled header
+#include "linden_common.h"
+// associated header
+#include "llinstancetracker.h"
+// STL headers
+#include <string>
+#include <vector>
+#include <set>
+#include <algorithm>                // std::sort()
+// std headers
+// external library headers
+#include <boost/scoped_ptr.hpp>
+// other Linden headers
+#include "../test/lltut.h"
+
+struct Keyed: public LLInstanceTracker<Keyed, std::string>
+{
+    Keyed(const std::string& name):
+        LLInstanceTracker<Keyed, std::string>(name),
+        mName(name)
+    {}
+    std::string mName;
+};
+
+struct Unkeyed: public LLInstanceTracker<Unkeyed>
+{
+};
+
+/*****************************************************************************
+*   TUT
+*****************************************************************************/
+namespace tut
+{
+    struct llinstancetracker_data
+    {
+    };
+    typedef test_group<llinstancetracker_data> llinstancetracker_group;
+    typedef llinstancetracker_group::object object;
+    llinstancetracker_group llinstancetrackergrp("llinstancetracker");
+
+    template<> template<>
+    void object::test<1>()
+    {
+        ensure_equals(Keyed::instanceCount(), 0);
+        {
+            Keyed one("one");
+            ensure_equals(Keyed::instanceCount(), 1);
+            Keyed* found = Keyed::getInstance("one");
+            ensure("couldn't find stack Keyed", found);
+            ensure_equals("found wrong Keyed instance", found, &one);
+            {
+                boost::scoped_ptr<Keyed> two(new Keyed("two"));
+                ensure_equals(Keyed::instanceCount(), 2);
+                Keyed* found = Keyed::getInstance("two");
+                ensure("couldn't find heap Keyed", found);
+                ensure_equals("found wrong Keyed instance", found, two.get());
+            }
+            ensure_equals(Keyed::instanceCount(), 1);
+        }
+        Keyed* found = Keyed::getInstance("one");
+        ensure("Keyed key lives too long", ! found);
+        ensure_equals(Keyed::instanceCount(), 0);
+    }
+
+    template<> template<>
+    void object::test<2>()
+    {
+        ensure_equals(Unkeyed::instanceCount(), 0);
+        {
+            Unkeyed one;
+            ensure_equals(Unkeyed::instanceCount(), 1);
+            Unkeyed* found = Unkeyed::getInstance(&one);
+            ensure_equals(found, &one);
+            {
+                boost::scoped_ptr<Unkeyed> two(new Unkeyed);
+                ensure_equals(Unkeyed::instanceCount(), 2);
+                Unkeyed* found = Unkeyed::getInstance(two.get());
+                ensure_equals(found, two.get());
+            }
+            ensure_equals(Unkeyed::instanceCount(), 1);
+        }
+        ensure_equals(Unkeyed::instanceCount(), 0);
+    }
+
+    template<> template<>
+    void object::test<3>()
+    {
+        Keyed one("one"), two("two"), three("three");
+        // We don't want to rely on the underlying container delivering keys
+        // in any particular order. That allows us the flexibility to
+        // reimplement LLInstanceTracker using, say, a hash map instead of a
+        // std::map. We DO insist that every key appear exactly once.
+        typedef std::vector<std::string> StringVector;
+        StringVector keys(Keyed::beginKeys(), Keyed::endKeys());
+        std::sort(keys.begin(), keys.end());
+        StringVector::const_iterator ki(keys.begin());
+        ensure_equals(*ki++, "one");
+        ensure_equals(*ki++, "three");
+        ensure_equals(*ki++, "two");
+        // Use ensure() here because ensure_equals would want to display
+        // mismatched values, and frankly that wouldn't help much.
+        ensure("didn't reach end", ki == keys.end());
+
+        // Use a somewhat different approach to order independence with
+        // beginInstances(): explicitly capture the instances we know in a
+        // set, and delete them as we iterate through.
+        typedef std::set<Keyed*> InstanceSet;
+        InstanceSet instances;
+        instances.insert(&one);
+        instances.insert(&two);
+        instances.insert(&three);
+        for (Keyed::instance_iter ii(Keyed::beginInstances()), iend(Keyed::endInstances());
+             ii != iend; ++ii)
+        {
+            Keyed& ref = *ii;
+            ensure_equals("spurious instance", instances.erase(&ref), 1);
+        }
+        ensure_equals("unreported instance", instances.size(), 0);
+    }
+
+    template<> template<>
+    void object::test<4>()
+    {
+        Unkeyed one, two, three;
+        typedef std::set<Unkeyed*> KeySet;
+        KeySet keys;
+        keys.insert(&one);
+        keys.insert(&two);
+        keys.insert(&three);
+        for (Unkeyed::key_iter ki(Unkeyed::beginKeys()), kend(Unkeyed::endKeys());
+             ki != kend; ++ki)
+        {
+            ensure_equals("spurious key", keys.erase(*ki), 1);
+        }
+        ensure_equals("unreported key", keys.size(), 0);
+
+        KeySet instances;
+        instances.insert(&one);
+        instances.insert(&two);
+        instances.insert(&three);
+        for (Unkeyed::instance_iter ii(Unkeyed::beginInstances()), iend(Unkeyed::endInstances());
+             ii != iend; ++ii)
+        {
+            Unkeyed& ref = *ii;
+            ensure_equals("spurious instance", instances.erase(&ref), 1);
+        }
+        ensure_equals("unreported instance", instances.size(), 0);
+    }
+} // namespace tut