Basic comp tests: add fix for pre-commissioned devices

Author: cecille

src/python_testing/basic_composition_support.py

@@ -104,6 +104,8 @@ def get_code(self, dev_ctrl):
             created_codes.append(dev_ctrl.CreateManualCode(discriminator, self.matter_test_config.setup_passcodes[idx]))
 
         setup_codes = self.matter_test_config.qr_code_content + self.matter_test_config.manual_code + created_codes
+        if not setup_codes:
+            return None
         asserts.assert_equal(len(setup_codes), 1,
                              "Require exactly one of either --qr-code, --manual-code or (--discriminator and --passcode).")
         return setup_codes[0]
@@ -132,7 +134,7 @@ async def setup_class_helper(self, allow_pase: bool = True):
         node_id = self.dut_node_id
 
         task_list = []
-        if allow_pase:
+        if allow_pase and self.get_code(dev_ctrl):
             setup_code = self.get_code(dev_ctrl)
             pase_future = dev_ctrl.EstablishPASESession(setup_code, self.dut_node_id)
             task_list.append(asyncio.create_task(pase_future))

src/python_testing/matter_testing_support.py

@@ -1744,15 +1744,19 @@ def populate_commissioning_args(args: argparse.Namespace, config: MatterTestConf
 
     device_descriptors = config.qr_code_content + config.manual_code + config.discriminators
 
+    if not config.dut_node_ids:
+        config.dut_node_ids = [_DEFAULT_DUT_NODE_ID]
+
+    if args.commissioning_method is None:
+        return True
+
     if len(config.dut_node_ids) > len(device_descriptors):
         print("error: More node IDs provided than discriminators")
         return False
 
     if len(config.dut_node_ids) < len(device_descriptors):
         # We generate new node IDs sequentially from the last one seen for all
         # missing NodeIDs when commissioning many nodes at once.
-        if not config.dut_node_ids:
-            config.dut_node_ids = [_DEFAULT_DUT_NODE_ID]
         missing = len(device_descriptors) - len(config.dut_node_ids)
         for i in range(missing):
             config.dut_node_ids.append(config.dut_node_ids[-1] + 1)
@@ -1765,9 +1769,6 @@ def populate_commissioning_args(args: argparse.Namespace, config: MatterTestConf
         print("error: Duplicate value in discriminator list")
         return False
 
-    if args.commissioning_method is None:
-        return True
-
     if args.discriminators == [] and (args.qr_code == [] and args.manual_code == []):
         print("error: Missing --discriminator when no --qr-code/--manual-code present!")
         return False