1 files changed, 48 insertions, 2 deletions
diff --git a/tests/unittests/config/test_cc_disk_setup.py b/tests/unittests/config/test_cc_disk_setup.py
index 8a8d7195..f2796e83 100644
--- a/tests/unittests/config/test_cc_disk_setup.py
+++ b/tests/unittests/config/test_cc_disk_setup.py
@@ -1,9 +1,23 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import random
+import re
+
+import pytest
 
 from cloudinit.config import cc_disk_setup
-from tests.unittests.helpers import CiTestCase, ExitStack, TestCase, mock
+from cloudinit.config.schema import (
+    SchemaValidationError,
+    get_schema,
+    validate_cloudconfig_schema,
+)
+from tests.unittests.helpers import (
+    CiTestCase,
+    ExitStack,
+    TestCase,
+    mock,
+    skipUnlessJsonSchema,
+)
 
 
 class TestIsDiskUsed(TestCase):
@@ -283,5 +297,37 @@ class TestMkfsCommandHandling(CiTestCase):
         )
 
 
-#
+@skipUnlessJsonSchema()
+class TestDebugSchema:
+    """Directly test schema rather than through handle."""
+
+    @pytest.mark.parametrize(
+        "config, error_msg",
+        (
+            # Valid schemas tested by meta.examples in test_schema
+            # Invalid schemas
+            ({"disk_setup": 1}, "disk_setup: 1 is not of type 'object'"),
+            ({"fs_setup": 1}, "fs_setup: 1 is not of type 'array'"),
+            (
+                {"device_aliases": 1},
+                "device_aliases: 1 is not of type 'object'",
+            ),
+            (
+                {"debug": {"boguskey": True}},
+                re.escape(
+                    "Additional properties are not allowed ('boguskey' was"
+                    " unexpected)"
+                ),
+            ),
+        ),
+    )
+    @skipUnlessJsonSchema()
+    def test_schema_validation(self, config, error_msg):
+        """Assert expected schema validation and error messages."""
+        # New-style schema $defs exist in config/cloud-init-schema*.json
+        schema = get_schema()
+        with pytest.raises(SchemaValidationError, match=error_msg):
+            validate_cloudconfig_schema(config, schema, strict=True)
+
+
 # vi: ts=4 expandtab