tests: Add a test case for the NVMe module

tests/unit_tests/pyanaconda_tests/modules/storage/test_module_nvme.py

@@ -0,0 +1,41 @@
+#
+# Copyright (C) 2023  Red Hat, Inc.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions of
+# the GNU General Public License v.2, or (at your option) any later version.
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY expressed or implied, including the implied warranties of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+# Public License for more details.  You should have received a copy of the
+# GNU General Public License along with this program; if not, write to the
+# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
+# source code or documentation are not subject to the GNU General Public
+# License and may only be used or replicated with the express permission of
+# Red Hat, Inc.
+#
+# Red Hat Author(s): Vojtech Trefny <[email protected]>
+#
+import unittest
+
+from unittest.mock import patch
+
+from pyanaconda.core.configuration.anaconda import conf
+from pyanaconda.modules.storage.nvme import NVMEModule
+from pyanaconda.modules.storage.nvme.nvme_interface import NVMEInterface
+
+
+class NVMEInterfaceTestCase(unittest.TestCase):
+    """Test DBus interface of the NVMe module."""
+
+    def setUp(self):
+        """Set up the module."""
+        self.nvme_module = NVMEModule()
+        self.nvme_interface = NVMEInterface(self.nvme_module)
+
+    @patch('pyanaconda.modules.storage.nvme.nvme.nvme')
+    def test_write_configuration(self, nvme):
+        """Test WriteConfiguration."""
+        self.nvme_interface.WriteConfiguration()
+        nvme.write.assert_called_once_with(conf.target.system_root)