add test resource for py_components unit test

unit_tests/source_declarative_manifest/resources/valid_py_components_code.py

@@ -0,0 +1,15 @@
+"""Custom Python components.py file for testing.
+
+This file is mostly a no-op (for now) but should trigger a failure if code file is not
+correctly parsed.
+"""
+
+from airbyte_cdk.sources.declarative.models import DeclarativeStream
+
+
+class CustomDeclarativeStream(DeclarativeStream):
+    """Custom declarative stream class.
+
+    We don't change anything from the base class, but this should still be enough to confirm
+    that the components.py file is correctly parsed.
+    """

unit_tests/source_declarative_manifest/resources/valid_py_components_config.json

@@ -0,0 +1,3 @@
+{
+  "pokemon_name": "blastoise"
+}