1 files changed, 46 insertions, 0 deletions
diff --git a/tests/unittests/config/test_cc_final_message.py b/tests/unittests/config/test_cc_final_message.py
new file mode 100644
index 00000000..46ba99b2
--- /dev/null
+++ b/tests/unittests/config/test_cc_final_message.py
@@ -0,0 +1,46 @@
+# This file is part of cloud-init. See LICENSE file for license information.
+import logging
+from unittest import mock
+
+import pytest
+
+from cloudinit.config.cc_final_message import handle
+
+
+class TestHandle:
+    # TODO: Expand these tests to cover full functionality; currently they only
+    # cover the logic around how the boot-finished file is written (and not its
+    # contents).
+
+    @pytest.mark.parametrize(
+        "instance_dir_exists,file_is_written,expected_log_substring",
+        [
+            (True, True, None),
+            (False, False, "Failed to write boot finished file "),
+        ],
+    )
+    def test_boot_finished_written(
+        self,
+        instance_dir_exists,
+        file_is_written,
+        expected_log_substring,
+        caplog,
+        tmpdir,
+    ):
+        instance_dir = tmpdir.join("var/lib/cloud/instance")
+        if instance_dir_exists:
+            instance_dir.ensure_dir()
+        boot_finished = instance_dir.join("boot-finished")
+
+        m_cloud = mock.Mock(
+            paths=mock.Mock(boot_finished=boot_finished.strpath)
+        )
+
+        handle(None, {}, m_cloud, logging.getLogger(), [])
+
+        # We should not change the status of the instance directory
+        assert instance_dir_exists == instance_dir.exists()
+        assert file_is_written == boot_finished.exists()
+
+        if expected_log_substring:
+            assert expected_log_substring in caplog.text