Index: firmware/App/Modes/OperationModes.c
===================================================================
diff -u -r98a1a2a624373a1d140daed0136522ab6e635237 -rd5f2ac4d84453feb1b782f35f9d69432977a95f6
--- firmware/App/Modes/OperationModes.c	(.../OperationModes.c)	(revision 98a1a2a624373a1d140daed0136522ab6e635237)
+++ firmware/App/Modes/OperationModes.c	(.../OperationModes.c)	(revision d5f2ac4d84453feb1b782f35f9d69432977a95f6)
@@ -7,8 +7,8 @@
 *
 * @file    OperationModes.c
 *
-* @author  (last)      Dara Navaei
-* @date    (last)      15-Jul-2022
+* @author  (last)      Michael Garthwaite
+* @date    (last)      08-Aug-2022
 *
 * @author  (original)  Dara Navaei
 * @date    (original)  05-Nov-2019
@@ -416,6 +416,34 @@
 
 /*********************************************************************//**
  * @brief
+ * The testSetOperationMode function will transition to a given operation
+ * mode if the transition is legal.
+ * @details Inputs: none
+ * @details Outputs: modeRequest[]
+ * @param newMode ID of requested mode to transition to
+ * @return TRUE if request successful, FALSE if not
+ *************************************************************************/
+BOOL testSetOperationMode( DG_OP_MODE_T newMode )
+{
+    BOOL result = FALSE;
+
+    if ( TRUE == isTestingActivated() )
+    {
+        DG_OP_MODE_T check = MODE_TRANSITION_TABLE[ currentMode ][ newMode ];
+
+        // Is mode transition legal?
+        if ( check == newMode )
+        {
+            requestNewOperationMode( newMode );
+            result = TRUE;
+        }
+    }
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
  * The testSetDGOpModePublishIntervalOverride function overrides the
  * DG operation mode publish interval.
  * @details Inputs: none