test_tap_schema: Add simple test of loading TAP_SCHEMA self-descripti…

…on schema

tests/test_tap_schema.py

@@ -26,7 +26,7 @@
 from sqlalchemy import MetaData, create_engine, select
 
 from felis.datamodel import Schema
-from felis.tap_schema import DataLoader, TableManager
+from felis.tap_schema import _TAP_SCHEMA_YAML, DataLoader, TableManager
 
 TESTDIR = os.path.abspath(os.path.dirname(__file__))
 TEST_YAML = os.path.join(TESTDIR, "data", "sales.yaml")
@@ -198,3 +198,34 @@ def test_key_columns(self) -> None:
         self.assertEqual(key_column["key_id"], "fk_table1_to_table2")
         self.assertEqual(key_column["from_column"], "fk")
         self.assertEqual(key_column["target_column"], "id")
+
+
+class TapSchemaMetaTest(unittest.TestCase):
+    """Test loading of a TAP_SCHEMA representation from a YAML schema into
+    TAP_SCHEMA itself.
+    """
+
+    def setUp(self) -> None:
+        """Set up the test case."""
+        self.schema = Schema.model_validate(
+            yaml.safe_load(open(_TAP_SCHEMA_YAML)), context={"generate_ids": True}
+        )
+
+        self.engine = create_engine("sqlite:///:memory:")
+
+        mgr = TableManager(apply_schema_to_metadata=False, table_name_postfix=TABLE_NAME_POSTFIX)
+        mgr.initialize_database(self.engine)
+        self.mgr = mgr
+
+        loader = DataLoader(self.schema, mgr, self.engine, outfile=None)
+        loader.load()
+
+        self.md = MetaData()
+        self.md.reflect(self.engine)
+
+    def test_tap_schema(self) -> None:
+        with self.engine.connect() as connection:
+            for table_name in ["schemas11", "tables11", "columns11", "keys11", "key_columns11"]:
+                result = connection.execute(select(self.md.tables[table_name]))
+                for row in result:
+                    print(row)