TC-RR-1.1: Fix for pre-existing fabric removal (project-chip#32921)

* TC-RR-1.1: Fix for pre-existing fabric removal

This test assumed that the client ordering matched to the ordering
of the fabric table, but this is not the case if there is a fabric
on the device before the test starts. In this case, the initial
fabric is in table slot 1 with index 1, the test starts in table
slot 2, with fabric index 2. Then the initial fabric is removed
from table slot 1, and the test adds a new fabric. The new fabric
is allocated fabric index 3, but appears in slot 1 in the table,
and the order between the controllers and the fabric table as read
off the device is now out of sync.

Instead, name the controllers based on the fabric index rather
than the index in the fabric table.

TEST: commissioned all-clusters using chip-tool then ran RR-1.1.
      Test now passes, whereas before there was a failure.

* Update src/python_testing/TC_RR_1_1.py

Co-authored-by: Andrei Litvin <[email protected]>

* Update src/python_testing/TC_RR_1_1.py

* Address review comments, fix

---------

Co-authored-by: Andrei Litvin <[email protected]>

src/python_testing/TC_RR_1_1.py

@@ -20,6 +20,7 @@
 import math
 import queue
 import random
+import string
 import time
 from typing import Any, Dict, List, Set
 
@@ -36,6 +37,10 @@
 #
 
 
+def generate_controller_name(fabric_index: int, controller_index: int):
+    return f"RD{fabric_index}{string.ascii_uppercase[controller_index]}"
+
+
 class TC_RR_1_1(MatterBaseTest):
     def setup_class(self):
         self._pseudo_random_generator = random.Random(1234)
@@ -96,11 +101,6 @@ async def test_TC_RR_1_1(self):
             logging.info("--> User label cluster not present on any endpoitns")
 
         # Generate list of all clients names
-        all_names = []
-        for fabric_idx in range(num_fabrics_to_commission):
-            for controller_idx in range(num_controllers_per_fabric):
-                all_names.append("RD%d%s" % (fabric_idx, chr(ord('A') + controller_idx)))
-        logging.info(f"Client names that will be used: {all_names}")
         client_list = []
 
         # TODO: Shall we also verify SupportedFabrics attribute, and the CapabilityMinima attribute?
@@ -119,7 +119,8 @@ async def test_TC_RR_1_1(self):
         node_ids = [200 + (i * 100) for i in range(num_controllers_per_fabric - 1)]
 
         # Prepare clients for first fabric, that includes the default controller
-        dev_ctrl.name = all_names.pop(0)
+        fabric_index = await self.read_single_attribute_check_success(cluster=Clusters.OperationalCredentials, attribute=Clusters.OperationalCredentials.Attributes.CurrentFabricIndex, dev_ctrl=dev_ctrl)
+        dev_ctrl.name = generate_controller_name(fabric_index, 0)
         client_list.append(dev_ctrl)
 
         if num_controllers_per_fabric > 1:
@@ -130,8 +131,8 @@ async def test_TC_RR_1_1(self):
                 privilege=Clusters.AccessControl.Enums.AccessControlEntryPrivilegeEnum.kAdminister,
                 targetNodeId=self.dut_node_id, catTags=[0x0001_0001]
             )
-            for controller in new_controllers:
-                controller.name = all_names.pop(0)
+            for idx, controller in enumerate(new_controllers):
+                controller.name = generate_controller_name(fabric_index, idx+1)
             client_list.extend(new_controllers)
 
         # Step 1c - Ensure there are no leftover fabrics from another process.
@@ -163,11 +164,11 @@ async def test_TC_RR_1_1(self):
             fabrics: List[Clusters.OperationalCredentials.Structs.FabricDescriptorStruct] = await self.read_single_attribute(
                 dev_ctrl, node_id=self.dut_node_id, endpoint=0,
                 attribute=Clusters.OperationalCredentials.Attributes.Fabrics, fabricFiltered=False)
+            current_fabric_index = await self.read_single_attribute_check_success(cluster=Clusters.OperationalCredentials, attribute=Clusters.OperationalCredentials.Attributes.CurrentFabricIndex)
             for fabric in fabrics:
-                if fabric.fabricID == dev_ctrl.fabricId:
+                if fabric.fabricIndex == current_fabric_index:
                     continue
-
-                # This is not the initial client's fabric, so remove it.
+                # This is not the test client's fabric, so remove it.
                 await dev_ctrl.SendCommand(
                     self.dut_node_id, 0, Clusters.OperationalCredentials.Commands.RemoveFabric(fabricIndex=fabric.fabricIndex))
 
@@ -184,13 +185,13 @@ async def test_TC_RR_1_1(self):
             new_fabric_admin = new_certificate_authority.NewFabricAdmin(vendorId=0xFFF1, fabricId=admin_index)
 
             new_admin_ctrl = new_fabric_admin.NewController(nodeId=dev_ctrl.nodeId, catTags=[0x0001_0001])
-            new_admin_ctrl.name = all_names.pop(0)
-            client_list.append(new_admin_ctrl)
             await CommissioningBuildingBlocks.AddNOCForNewFabricFromExisting(commissionerDevCtrl=dev_ctrl,
                                                                              newFabricDevCtrl=new_admin_ctrl,
                                                                              existingNodeId=self.dut_node_id,
                                                                              newNodeId=self.dut_node_id)
-
+            fabric_index = await self.read_single_attribute_check_success(cluster=Clusters.OperationalCredentials, attribute=Clusters.OperationalCredentials.Attributes.CurrentFabricIndex, dev_ctrl=new_admin_ctrl)
+            new_admin_ctrl.name = generate_controller_name(fabric_index, 0)
+            client_list.append(new_admin_ctrl)
             if num_controllers_per_fabric > 1:
                 new_controllers = await CommissioningBuildingBlocks.CreateControllersOnFabric(
                     fabricAdmin=new_fabric_admin,
@@ -200,8 +201,8 @@ async def test_TC_RR_1_1(self):
                     targetNodeId=self.dut_node_id,
                     catTags=[0x0001_0001]
                 )
-                for controller in new_controllers:
-                    controller.name = all_names.pop(0)
+                for idx, controller in enumerate(new_controllers):
+                    controller.name = generate_controller_name(fabric_index, idx+1)
 
                 client_list.extend(new_controllers)
 
@@ -224,10 +225,8 @@ async def test_TC_RR_1_1(self):
         # Step 2: Set the Label field for each fabric and BasicInformation.NodeLabel to 32 characters
         logging.info("Step 2: Setting the Label field for each fabric and BasicInformation.NodeLabel to 32 characters")
 
-        for table_idx in range(len(fabric_table)):
-            # Client is client A for each fabric to set the Label field
-            fabric = fabric_table[table_idx]
-            client_name = "RD%dA" % table_idx
+        for fabric in fabric_table:
+            client_name = generate_controller_name(fabric.fabricIndex, 0)
             client = client_by_name[client_name]
 
             # Send the UpdateLabel command
@@ -451,10 +450,8 @@ async def test_TC_RR_1_1(self):
             # Create a list of per-fabric clients to use for filling group resources accross all fabrics.
             fabric_unique_clients: List[Any] = []
 
-            for table_idx in range(len(fabric_table)):
-                # Client is client A for each fabric
-                fabric = fabric_table[table_idx]
-                client_name = "RD%dA" % table_idx
+            for fabric in fabric_table:
+                client_name = generate_controller_name(fabric.fabricIndex, 0)
                 fabric_unique_clients.append(client_by_name[client_name])
 
             # Step 13: Write and verify indicated_max_group_keys_per_fabric group keys to all fabrics.
@@ -696,9 +693,8 @@ async def send_acl(self,
                        enable_access_to_group_cluster: bool,
                        fabric_table: List[
                            Clusters.OperationalCredentials.Structs.FabricDescriptorStruct]):
-        for table_idx, fabric in enumerate(fabric_table):
-            # Client is client A for each fabric
-            client_name = "RD%dA" % table_idx
+        for fabric in fabric_table:
+            client_name = generate_controller_name(fabric.fabricIndex, 0)
             client = client_by_name[client_name]
 
             acl = self.build_acl(enable_access_to_group_cluster)