Add morrowind test for moving object into container

scripts/data/morrowind_tests/test.lua

@@ -2,6 +2,7 @@ local testing = require('testing_util')
 local util = require('openmw.util')
 local world = require('openmw.world')
 local core = require('openmw.core')
+local types = require('openmw.types')
 
 if not core.contentFiles.has('Morrowind.esm') then
     error('This test requires Morrowind.esm')
@@ -18,6 +19,28 @@ local tests = {
         coroutine.yield()
         testing.runLocalTest(world.players[1], 'Guard in Imperial Prison Ship should find path (#7241)')
     end},
+    {'Should keep reference to an object moved into container (#7663)', function()
+        world.players[1]:teleport('ToddTest', util.vector3(2176, 3648, -191), util.transform.rotateZ(math.rad(0)))
+        coroutine.yield()
+        local barrel = world.createObject('barrel_01', 1)
+        local fargothRing = world.createObject('ring_keley', 1)
+        coroutine.yield()
+        testing.expectEqual(types.Container.inventory(barrel):find('ring_keley'), nil)
+        fargothRing:moveInto(types.Container.inventory(barrel))
+        coroutine.yield()
+        testing.expectEqual(fargothRing.recordId, 'ring_keley')
+        local isFargothRing = function(actual)
+            if actual == nil then
+                return 'ring_keley is not found'
+            end
+            if actual.id ~= fargothRing.id then
+                return 'found ring_keley id does not match expected: actual=' .. tostring(actual.id)
+                       .. ', expected=' .. tostring(fargothRing.id)
+            end
+            return ''
+        end
+        testing.expectThat(types.Container.inventory(barrel):find('ring_keley'), isFargothRing)
+    end},
 }
 
 return {