xfconf: fix existing empty array case (#11026)

* xfconf: fix existing empty array case

* fix xfconf_info as well

* add changelog frag

changelogs/fragments/11026-xfconf-empty-array.yml

@@ -0,0 +1,3 @@
+bugfixes:
+  - xfconf - fix handling of empty array properties (https://github.com/ansible-collections/community.general/pull/11026).
+  - xfconf_info - fix handling of empty array properties (https://github.com/ansible-collections/community.general/pull/11026).

plugins/modules/xfconf.py

@@ -209,8 +209,11 @@ class XFConfProperty(StateModuleHelper):
         result = out.rstrip()
         if "Value is an array with" in result:
             result = result.split("\n")
-            result.pop(0)
+            if len(result) > 1:
-            result.pop(0)
+                result.pop(0)
+                result.pop(0)
+            else:
+                return []
 
         return result
 

plugins/modules/xfconf_info.py

@@ -149,9 +149,12 @@ class XFConfInfo(ModuleHelper):
         result = out.rstrip()
         if "Value is an array with" in result:
             result = result.split("\n")
-            result.pop(0)
-            result.pop(0)
             self.vars.is_array = True
+            if len(result) > 1:
+                result.pop(0)
+                result.pop(0)
+            else:
+                return []
 
         return result
 

tests/unit/plugins/modules/test_xfconf.yaml

@@ -206,6 +206,55 @@ test_cases:
           rc: 0
           out: ''
           err: ''
+  - id: test_property_array_previously_empty
+    input:
+      channel: xfwm4
+      property: /general/workspace_names
+      state: present
+      value_type: string
+      value: [A, B, C]
+    output:
+      changed: true
+      previous_value: []
+      type: [string, string, string]
+      value: [A, B, C]
+      version: 4.18.1
+    mocks:
+      run_command:
+        - command: [/testbin/xfconf-query, --version]
+          environ: *env-def
+          rc: 0
+          out: *version-output
+          err: ''
+        - command: [/testbin/xfconf-query, --channel, xfwm4, --property, /general/workspace_names]
+          environ: *env-def
+          rc: 0
+          out: "Value is an array with 0 items:\n\n"
+          err: ''
+        - command:
+            - /testbin/xfconf-query
+            - --channel
+            - xfwm4
+            - --property
+            - /general/workspace_names
+            - --create
+            - --force-array
+            - --type
+            - string
+            - --set
+            - A
+            - --type
+            - string
+            - --set
+            - B
+            - --type
+            - string
+            - --set
+            - C
+          environ: *env-def
+          rc: 0
+          out: ''
+          err: ''
   - id: test_property_reset_value
     input:
       channel: xfwm4