aci_switch_leaf_selector: Support missing policy_group (#47992)

* aci_switch_leaf_selector: Support empty policy_group

* Reorganize code

* Adapt integration tests to fix

changelogs/fragments/47668-aci_switch_leaf_selector-support_empty_policy_group.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- aci_switch_leaf_selector - Support empty policy_group

lib/ansible/modules/network/aci/aci_switch_leaf_selector.py

@@ -260,6 +260,30 @@ def main():
     policy_group = module.params['policy_group']
     state = module.params['state']
 
+    # Build child_configs dynamically
+    child_configs = [
+        dict(
+            infraNodeBlk=dict(
+                attributes=dict(
+                    descr=leaf_node_blk_description,
+                    name=leaf_node_blk,
+                    from_=from_,
+                    to_=to_,
+                ),
+            ),
+        ),
+    ]
+
+    # Add infraRsAccNodePGrp only when policy_group was defined
+    if policy_group is not None:
+        child_configs.append(dict(
+            infraRsAccNodePGrp=dict(
+                attributes=dict(
+                    tDn='uni/infra/funcprof/accnodepgrp-{0}'.format(policy_group),
+                ),
+            ),
+        ))
+
     aci = ACIModule(module)
     aci.construct_url(
         root_class=dict(
@@ -289,25 +313,7 @@ def main():
                 descr=description,
                 name=leaf,
             ),
-            child_configs=[
-                dict(
-                    infraNodeBlk=dict(
-                        attributes=dict(
-                            descr=leaf_node_blk_description,
-                            name=leaf_node_blk,
-                            from_=from_,
-                            to_=to_,
-                        ),
-                    ),
-                ),
-                dict(
-                    infraRsAccNodePGrp=dict(
-                        attributes=dict(
-                            tDn='uni/infra/funcprof/accnodepgrp-{0}'.format(policy_group),
-                        ),
-                    ),
-                ),
-            ],
+            child_configs=child_configs,
         )
 
         aci.get_diff(aci_class='infraLeafS')

test/integration/targets/aci_switch_leaf_selector/tasks/main.yml

@@ -68,7 +68,7 @@
     - sw_leaf_selec_check_mode_present is changed
     - sw_leaf_selec_present is changed
     - sw_leaf_selec_present.previous == []
-    - 'sw_leaf_selec_present.sent ==  {"infraLeafS": {"attributes": {"name": "leaf_selector_name"}, "children": [{"infraNodeBlk": {"attributes": {"from_": "1011", "name": "node_blk_name", "to_": "1011"}}},{"infraRsAccNodePGrp": {"attributes": {"tDn": "uni/infra/funcprof/accnodepgrp-None"}}}]}}'
+    - 'sw_leaf_selec_present.sent ==  {"infraLeafS": {"attributes": {"name": "leaf_selector_name"}, "children": [{"infraNodeBlk": {"attributes": {"from_": "1011", "name": "node_blk_name", "to_": "1011"}}}]}}'
     - sw_leaf_selec_idempotent is not changed
     - sw_leaf_selec_idempotent.sent == {}
     - sw_leaf_selec_update is changed