test: add CI check for stale JSON schema

Author: b-per

tests/schemas/test_json_schema_up_to_date.py

@@ -0,0 +1,19 @@
+import json
+from pathlib import Path
+
+from dbt_jobs_as_code.schemas.config import generate_config_schema
+
+SCHEMA_PATH = Path("src/dbt_jobs_as_code/schemas/load_job_schema.json")
+
+
+def test_json_schema_is_up_to_date():
+    """Ensure the committed JSON schema matches what the models generate.
+
+    If this fails, run: `dbt-jobs-as-code update-json-schema`
+    """
+    committed = json.loads(SCHEMA_PATH.read_text())
+    generated = json.loads(generate_config_schema())
+    assert committed == generated, (
+        "The committed JSON schema is out of date. "
+        "Run `dbt-jobs-as-code update-json-schema` to regenerate it."
+    )