yum: fix reporting group changes in check_mode (#28331)

lib/ansible/modules/packaging/os/yum.py

@@ -744,9 +744,20 @@ def install(module, items, repoq, yum_basecmd, conf_file, en_repos, dis_repos, i
                 continue
             pkg = package
 
-        #groups :(
+        # groups
         elif spec.startswith('@'):
-            # complete wild ass guess b/c it's a group
+            found = False
+            my = yum_base()
+            groups_list = my.doGroupLists()
+            for group in groups_list[0]:  # list of the installed groups on the first index
+                spec_lower = spec.lower()
+                if spec_lower.endswith(group.name.lower()) or spec_lower.endswith(group.groupid.lower()):
+                    found = True
+                    break
+
+            if found:
+                continue
+
             pkg = spec
 
         # range requires or file-requires or pkgname :(

test/integration/targets/yum/tasks/yum.yml

@@ -255,7 +255,7 @@
     state: present
   register: yum_result
 
-- name: verify nothing changed
+- name: verify sos is installed
   assert:
     that:
         - "yum_result.rc == 0"
@@ -269,6 +269,25 @@
         - "'rc' in yum_result"
         - "'results' in yum_result"
 
+- name: try to install the group again, with --check to check 'changed'
+  yum:
+    name: "@Development Tools"
+    state: present
+  check_mode: yes
+  register: yum_result
+
+- name: verify nothing changed
+  assert:
+    that:
+        - "not yum_result.changed"
+
+- name: verify yum module outputs
+  assert:
+    that:
+        - "'changed' in yum_result"
+        - "'msg' in yum_result"
+        - "'results' in yum_result"
+
 - name: try to install non existing group
   yum:
     name: "@non-existing-group"