feat: Unit tests for Packet Forward Middleware (#8313)

Co-authored-by: Gjermund Garaba <gjermund@garaba.net>

Author: DeshErBojhaa

testing/simapp/app.go

@@ -385,6 +385,8 @@ func NewSimApp(
 
 	app.PFMKeeper.SetTransferKeeper(app.TransferKeeper)
 
+	app.PFMKeeper.SetTransferKeeper(app.TransferKeeper)
+
 	// Mock Module Stack
 
 	// Mock Module setup for testing IBC and also acts as the interchain accounts authentication module
@@ -437,11 +439,14 @@ func NewSimApp(
 
 	var icaHostStack porttypes.IBCModule = icahost.NewIBCModule(app.ICAHostKeeper)
 
+	pfmStack := packetforward.NewIBCMiddleware(transferStack, app.PFMKeeper, 0, packetforwardkeeper.DefaultForwardTransferPacketTimeoutTimestamp)
+
 	// Add host, controller & ica auth modules to IBC router
 	ibcRouter.
 		AddRoute(icacontrollertypes.SubModuleName, icaControllerStack).
 		AddRoute(icahosttypes.SubModuleName, icaHostStack).
-		AddRoute(ibcmock.ModuleName+icacontrollertypes.SubModuleName, icaControllerStack) // ica with mock auth module stack route to ica (top level of middleware stack)
+		AddRoute(ibcmock.ModuleName+icacontrollertypes.SubModuleName, icaControllerStack). // ica with mock auth module stack route to ica (top level of middleware stack)
+		AddRoute(packetforwardtypes.ModuleName, pfmStack)
 
 	// create two separate mock v2 applications so that it is possible to test multi packet data.
 	mockV2A := mockv2.NewIBCModule()