test(stages/skopeo): schema validation

Minor schema validation test.

stages/test/test_skopeo.py

@@ -0,0 +1,42 @@
+#!/usr/bin/python3
+
+import os.path
+
+import pytest
+
+import osbuild.meta
+
+
+@pytest.mark.parametrize("test_data,expected_err", [
+    # bad
+    ({}, "'destination' is a required property"),
+    ({"destination": {}}, "is not valid under any of the given schemas"),
+    ({"destination": {"type": "foo"}}, "is not valid under any of the given schemas"),
+    ({"destination": {"type": "oci"}}, "is not valid under any of the given schemas"),
+    # good
+    ({"destination": {"type": "oci", "path": "/foo"}}, ""),
+
+    # this one might not be expected but it's valid because we don't require any
+    # *inputs* and it'll be a no-op in the stage
+    ({"destination": {"type": "containers-storage"}}, ""),
+])
+def test_schema_validation_skopeo(test_data, expected_err):
+    name = "org.osbuild.skopeo"
+    root = os.path.join(os.path.dirname(__file__), "../..")
+    mod_info = osbuild.meta.ModuleInfo.load(root, "Stage", name)
+    schema = osbuild.meta.Schema(mod_info.get_schema(version="2"), name)
+
+    test_input = {
+        "type": "org.osbuild.skopeo",
+        "options": {},
+    }
+    test_input["options"].update(test_data)
+    res = schema.validate(test_input)
+
+    if expected_err == "":
+        assert res.valid is True, f"err: {[e.as_dict() for e in res.errors]}"
+    else:
+        assert res.valid is False
+        assert len(res.errors) == 1, [e.as_dict() for e in res.errors]
+        err_msgs = [e.as_dict()["message"] for e in res.errors]
+        assert expected_err in err_msgs[0]