Show details about failed task

plugins/module_utils/task_tag.py

@@ -9,6 +9,7 @@
 
 __metaclass__ = type
 
+import json
 from time import sleep
 
 from ..module_utils import errors
@@ -46,9 +47,9 @@ def wait_task(
                 "ERROR",
                 "UNINITIALIZED",
             ):  # TaskTag has finished unsucessfully or was never initialized, both are errors.
-                raise errors.ScaleComputingError(
-                    "There was a problem during this task execution."
-                )
+                msg = "There was a problem during this task execution."
+                msg += f" Task details: {json.dumps(task_status)}"
+                raise errors.ScaleComputingError(msg)
             if task_status.get("state", "") not in (
                 "RUNNING",
                 "QUEUED",

tests/unit/plugins/module_utils/test_task_tag.py

@@ -0,0 +1,78 @@
+# -*- coding: utf-8 -*-
+# # Copyright: (c) 2023, XLAB Steampunk <steampunk@xlab.si>
+#
+# 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 sys
+
+import pytest
+
+from ansible_collections.scale_computing.hypercore.plugins.module_utils.task_tag import (
+    TaskTag,
+)
+from ansible_collections.scale_computing.hypercore.plugins.module_utils import errors
+from ansible_collections.scale_computing.hypercore.plugins.module_utils.utils import (
+    MIN_PYTHON_VERSION,
+)
+
+pytestmark = pytest.mark.skipif(
+    sys.version_info < MIN_PYTHON_VERSION,
+    reason=f"requires python{MIN_PYTHON_VERSION[0]}.{MIN_PYTHON_VERSION[1]} or higher",
+)
+
+error_task_tag = {
+    "taskTag": "36199",
+    "progressPercent": 0,
+    "state": "ERROR",
+    "formattedDescription": "Delete block device %@ for Virtual Machine %@",
+    "descriptionParameters": ["3aad4f9d", "demo-vm"],
+    "formattedMessage": "Unable to delete block device from VM '%@': Still in use",
+    "messageParameters": ["demo-vm"],
+    "objectUUID": "8c6196be-ddb5-4357-9783-50869dc60969",
+    "created": 1687925214,
+    "modified": 1687925276,
+    "completed": 1687925276,
+    "sessionID": "d4fa7269-caa0-4a0a-b5d8-85d8601e93c4",
+    "nodeUUIDs": ["3dcb0c96-f013-4ccc-b639-33605ea78c44"],
+}
+
+
+ok_task_tag = {
+    "taskTag": "10",
+    "progressPercent": 100,
+    "state": "COMPLETE",
+    "formattedDescription": "Delete Alert Email Target",
+    "descriptionParameters": [],
+    "formattedMessage": "",
+    "messageParameters": [],
+    "objectUUID": "default-target",
+    "created": 1686128448,
+    "modified": 1686128448,
+    "completed": 1686128448,
+    "sessionID": "d339e80b-e2a9-4b81-a55f-d1d13d6c8645",
+    "nodeUUIDs": [],
+}
+
+
+class TestTaskTag:
+    def test_wait_task_ok(self, mocker):
+        task = dict(taskTag=10)
+        rest_client = mocker.MagicMock()
+        rest_client.get_record.return_value = ok_task_tag
+        TaskTag.wait_task(rest_client, task)
+
+    def test_wait_task_error(self, mocker):
+        # Ensure a meaningful error message is shown in ansible stderr if tasktag fails.
+        task = dict(taskTag=36199)
+        rest_client = mocker.MagicMock()
+        rest_client.get_record.return_value = error_task_tag
+        with pytest.raises(
+            errors.ScaleComputingError,
+            match="There was a problem during this task execution. Task details: "
+            + '{"taskTag": "36199", "progressPercent": 0, "state": "ERROR",',
+        ):
+            TaskTag.wait_task(rest_client, task)