Ensure compatibility with Helm v4 for the collection (#1090) (#1096)

This is a backport of PR #1090 as merged into main (e6076e5).
SUMMARY

Ensure compatibility with Helm v4 for modules helm_plugin and helm_plugin_info
Partially addresses #1038

ISSUE TYPE


Feature Pull Request

COMPONENT NAME

helm_plugin
helm_plugin_info
helm_info
helm_pull
helm_registry_auth
helm
helm_template

Reviewed-by: Bikouo Aubin
Reviewed-by: Matthew Johnson

tests/unit/module_utils/helm/test_helm.py

@@ -455,9 +455,9 @@ def test_module_get_helm_set_values_args(set_values, expected):
         ("3.17.0", False),
         ("2.9.0", True),
         ("2.17.0", True),
-        ("4.0.0", True),
-        ("4.1.0", True),
-        ("5.0.0", True),
+        ("4.0.0", False),
+        ("4.1.0", False),
+        ("5.0.0", False),
     ],
 )
 def test_module_validate_helm_version(_ansible_helm_module, helm_version, should_fail):
@@ -469,8 +469,10 @@ def test_module_validate_helm_version(_ansible_helm_module, helm_version, should
             _ansible_helm_module.validate_helm_version()
         _ansible_helm_module.fail_json.assert_called_once()
         call_args = _ansible_helm_module.fail_json.call_args
-        assert "Helm version must be >=3.0.0,<4.0.0" in call_args[1]["msg"]
-        assert helm_version in call_args[1]["msg"]
+        assert (
+            f"Helm version must be >= 3.0.0, current version is {helm_version}"
+            == call_args[1]["msg"]
+        )
     else:
         _ansible_helm_module.validate_helm_version()
         _ansible_helm_module.fail_json.assert_not_called()

tests/unit/module_utils/helm/test_helm_plugin_list.py

@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+# Copyright: (c) 2026, Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import absolute_import, division, print_function
+
+__metaclass__ = type
+
+import pytest
+from ansible_collections.kubernetes.core.plugins.module_utils.helm import (
+    parse_helm_plugin_list,
+)
+
+
+def test_parse_helm_plugin_list_empty():
+    assert parse_helm_plugin_list() == []
+
+
+@pytest.mark.parametrize(
+    "output,expected",
+    [
+        (
+            """
+NAME	VERSION	TYPE	APIVERSION	PROVENANCE	SOURCE
+diff	3.4.1  	cli/v1	legacy    	unknown   	unknown
+
+        """,
+            [
+                dict(
+                    name="diff",
+                    version="3.4.1",
+                    type="cli/v1",
+                    apiversion="legacy",
+                    provenance="unknown",
+                    source="unknown",
+                )
+            ],
+        ),
+        (
+            """
+NAME	VERSION	DESCRIPTION
+diff	3.4.1  	Preview helm upgrade changes as a diff
+        """,
+            [
+                dict(
+                    name="diff",
+                    version="3.4.1",
+                    description="Preview helm upgrade changes as a diff",
+                )
+            ],
+        ),
+    ],
+)
+def test_parse_helm_plugin_list_values(output, expected):
+    assert parse_helm_plugin_list(output.split("\n")) == expected