feat/metadata-schema-validation (#165)

Reviewed-on: #165

tests/conftest.py

@@ -0,0 +1,2 @@
+# Tests for tools/build and tools/update-gh.
+# See https://git.unkin.net/unkin/rpmbuilder/issues/162

tests/test_metadata.py

@@ -0,0 +1,36 @@
+"""Validate every rpms/*/metadata.yaml against schema/metadata.json."""
+
+import json
+from pathlib import Path
+
+import jsonschema
+import pytest
+import yaml
+
+REPO_ROOT = Path(__file__).parent.parent
+SCHEMA_FILE = REPO_ROOT / "schema" / "metadata.json"
+RPMS_DIR = REPO_ROOT / "rpms"
+
+
+@pytest.fixture(scope="session")
+def schema():
+    with open(SCHEMA_FILE) as f:
+        return json.load(f)
+
+
+def metadata_files():
+    return sorted(RPMS_DIR.glob("*/metadata.yaml"))
+
+
+@pytest.mark.parametrize("metadata_file", metadata_files(), ids=lambda p: p.parent.name)
+def test_metadata_valid(metadata_file, schema):
+    with open(metadata_file) as f:
+        data = yaml.safe_load(f)
+
+    validator = jsonschema.Draft7Validator(schema)
+    errors = sorted(validator.iter_errors(data), key=str)
+
+    assert not errors, "\n".join(
+        f"  {'.'.join(str(p) for p in e.absolute_path) or '(root)'}: {e.message}"
+        for e in errors
+    )