kubevirt_vm_info: Add info module for VirtualMachines

This adds the kubevirt_vm_info module, which returns the same results as
the kubevirt_vm module, but is limited to read-only functionality.

Signed-off-by: Felix Matouschek <fmatouschek@redhat.com>

tests/unit/modules/test_module_kubevirt_vm_info.py

@@ -0,0 +1,93 @@
+# -*- coding: utf-8 -*-
+# Copyright: (c) 2021, 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
+
+from unittest import TestCase
+from unittest.mock import patch
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible_collections.kubernetes.core.plugins.module_utils.k8s.service import (
+    K8sService,
+)
+from ansible_collections.kubevirt.core.plugins.modules import (
+    kubevirt_vm_info,
+)
+from ansible_collections.kubevirt.core.tests.unit.utils.ansible_module_mock import (
+    AnsibleExitJson,
+    exit_json,
+    fail_json,
+    set_module_args,
+    get_api_client,
+)
+
+FIXTURE1 = {
+    "kind": "VirtualMachine",
+    "api_version": "kubevirt.io/v1",
+    "name": None,
+    "namespace": None,
+    "label_selectors": [],
+    "field_selectors": [],
+    "wait": False,
+    "wait_sleep": 5,
+    "wait_timeout": 120,
+    "condition": {"type": "Ready", "status": True},
+}
+
+FIXTURE2 = {
+    "kind": "VirtualMachine",
+    "api_version": "kubevirt.io/v1",
+    "name": "testvm",
+    "namespace": "default",
+    "label_selectors": [],
+    "field_selectors": [],
+    "wait": False,
+    "wait_sleep": 5,
+    "wait_timeout": 120,
+    "condition": {"type": "Ready", "status": True},
+}
+
+
+class TestDescribeVM(TestCase):
+    def setUp(self):
+        self.mock_module_helper = patch.multiple(
+            AnsibleModule, exit_json=exit_json, fail_json=fail_json
+        )
+        self.mock_module_helper.start()
+
+        self.mock_main = patch.multiple(kubevirt_vm_info, get_api_client=get_api_client)
+        self.mock_main.start()
+
+        # Stop the patch after test execution
+        # like tearDown but executed also when the setup failed
+        self.addCleanup(self.mock_module_helper.stop)
+        self.addCleanup(self.mock_main.stop)
+
+    def run_module(self, fixture):
+        with patch.object(K8sService, "find") as mock_find_command:
+            mock_find_command.return_value = {
+                "api_found": True,
+                "failed": False,
+                "resources": [],
+            }  # successful execution
+            with self.assertRaises(AnsibleExitJson):
+                kubevirt_vm_info.main()
+            mock_find_command.assert_called_once_with(
+                **fixture,
+            )
+
+    def test_describe_without_args(self):
+        set_module_args({})
+        self.run_module(FIXTURE1)
+
+    def test_describe_with_args(self):
+        set_module_args(
+            {
+                "name": "testvm",
+                "namespace": "default",
+            }
+        )
+        self.run_module(FIXTURE2)