Add test_mql structural Python model

tests/test_test_mql_structural.py

@@ -0,0 +1,46 @@
+from __future__ import annotations
+
+import unittest
+
+from PythonModels.systems.test_mql import GLOBAL_PARAMETERS, SUBMODEL_COUNTS, TestMqlSystem
+
+
+class TestMqlStructuralTest(unittest.TestCase):
+    def test_snapshot_matches_amesim_archive_metadata(self) -> None:
+        snapshot = TestMqlSystem().snapshot()
+
+        self.assertEqual(snapshot.model_name, "test_mql")
+        self.assertEqual(snapshot.component_count, 117)
+        self.assertEqual(snapshot.connection_count, 84)
+        self.assertEqual(snapshot.continuous_state_count, 132)
+        self.assertEqual(snapshot.discrete_state_count, 24)
+        self.assertEqual(snapshot.global_parameters["P0"], "153")
+        self.assertEqual(snapshot.global_parameters["cf"], "0.45")
+
+    def test_network_preserves_component_and_connection_counts(self) -> None:
+        system = TestMqlSystem()
+
+        self.assertEqual(len(system.network.components), 117)
+        self.assertEqual(len(system.network.connections), 84)
+        self.assertIn("pn_brp2_8", system.network.components)
+        self.assertIn("pn_gas_data", system.network.components)
+
+    def test_submodel_counts_keep_key_amesim_families(self) -> None:
+        self.assertEqual(SUBMODEL_COUNTS["PNRP17"], 8)
+        self.assertEqual(SUBMODEL_COUNTS["PNCH012"], 8)
+        self.assertEqual(SUBMODEL_COUNTS["PNOR001"], 8)
+        self.assertEqual(SUBMODEL_COUNTS["PNVO001"], 8)
+        self.assertEqual(SUBMODEL_COUNTS["PNGD00"], 1)
+        self.assertEqual(GLOBAL_PARAMETERS["V"], "15")
+
+    def test_structural_simulation_shape(self) -> None:
+        result = TestMqlSystem().simulate()
+
+        self.assertEqual(len(result.t), 101)
+        self.assertEqual(len(result.y), 132)
+        self.assertEqual(result.series["component_count"][0], 117.0)
+        self.assertEqual(result.series["connection_count"][0], 84.0)
+
+
+if __name__ == "__main__":
+    unittest.main()