Add unit tests for `osmorphing.osdetect.coreos.py`

module

Signed-off-by: Mihaela Balutoiu <mbalutoiu@cloudbasesolutions.com>

coriolis/tests/osmorphing/osdetect/test_coreos.py

@@ -0,0 +1,36 @@
+# Copyright 2024 Cloudbase Solutions Srl
+# All Rights Reserved.
+
+from unittest import mock
+
+from coriolis.osmorphing.osdetect import base
+from coriolis.osmorphing.osdetect import coreos
+from coriolis.tests import test_base
+
+
+class CoreOSOSDetectToolsTestCase(test_base.CoriolisBaseTestCase):
+    """Test suite for the CoreOSOSDetectTools class."""
+
+    @mock.patch.object(base.BaseLinuxOSDetectTools, '_get_os_release')
+    def test_detect_os(self, mock_get_os_release):
+        mock_get_os_release.return_value = {
+            "ID": "coreos",
+            "VERSION_ID": mock.sentinel.version
+        }
+
+        expected_info = {
+            "os_type": coreos.constants.OS_TYPE_LINUX,
+            "distribution_name": coreos.COREOS_DISTRO_IDENTIFIER,
+            "release_version": mock.sentinel.version,
+            "friendly_release_name": "CoreOS Linux %s" % mock.sentinel.version
+        }
+
+        coreos_os_detect_tools = coreos.CoreOSOSDetectTools(
+            mock.sentinel.conn, mock.sentinel.os_root_dir,
+            mock.sentinel.operation_timeout)
+
+        result = coreos_os_detect_tools.detect_os()
+
+        mock_get_os_release.assert_called_once_with()
+
+        self.assertEqual(result, expected_info)