adding test_check_schema_builtin

tests/unit/cli/test_schemas.py

@@ -0,0 +1,29 @@
+import warnings
+
+import jsonschema
+import pytest
+
+from check_jsonschema.builtin_schemas import get_builtin_schema
+from check_jsonschema.cli.main_command import BUILTIN_SCHEMA_NAMES
+from check_jsonschema.regex_variants import RegexImplementation, RegexVariantName
+from check_jsonschema.schema_loader.main import _check_schema
+
+
+@pytest.mark.parametrize("name", BUILTIN_SCHEMA_NAMES)
+def test_check_schema_builtin(name):
+    """
+    Test that the builtin schema is valid
+    """
+    regex_name = RegexVariantName.default
+    if "azure-pipelines" in name:
+        regex_name = RegexVariantName.nonunicode
+    elif name == "vendor.compose-spec":
+        # supress DeprecationWarning: The metaschema specified by $schema was not found.
+        # This is likely due to the schema being a draft-07 schema.
+        warnings.filterwarnings("ignore", category=DeprecationWarning)
+    regex_impl = RegexImplementation(regex_name)
+    schema = get_builtin_schema(name)
+
+    # get the correct validator class and check the schema under its metaschema
+    validator_cls = jsonschema.validators.validator_for(schema)
+    _check_schema(validator_cls, schema, regex_impl=regex_impl)