Adds minimal validation test

Author: Alan Christie

tests/test_validate_job_schema.py

@@ -0,0 +1,29 @@
+# Tests for the schema validator.
+from typing import Any, Dict
+
+import pytest
+pytestmark = pytest.mark.unit
+
+from decoder import decoder
+
+
+def test_validate_minimal():
+    # Arrange
+    text: Dict[str, Any] = {
+        'kind': 'DataManagerJobDefinition',
+        'kind-version': '2021.1',
+        'collection': 'test',
+        'repository-url': 'https://example.com',
+        'repository-tag': '1.0.0',
+        'jobs': {'demo': {'version': '1.0.0',
+                          'name': 'test',
+                          'image': {'name': 'blob',
+                                    'tag': '1.0.0',
+                                    'project-directory': '/data'},
+                          'command': 'sys.exit(1)'}}}
+
+    # Act
+    error = decoder.validate_job_schema(text)
+
+    # Assert
+    assert error is None