feat: integrate AMESim media models and editor UI

tests/test_reactflow_project_medium_reference.py

@@ -0,0 +1,65 @@
+from __future__ import annotations
+
+import unittest
+
+from app.main import (
+    ReactFlowProjectPayload,
+    build_reactflow_system_xml,
+    pydantic_to_jsonable,
+)
+
+
+class ReactFlowProjectMediumReferenceVersionTests(unittest.TestCase):
+    def test_version_one_is_accepted_and_serialized(self) -> None:
+        project = ReactFlowProjectPayload(
+            name="versioned-medium-references",
+            mediumReferenceVersion=1,
+        )
+
+        self.assertEqual(project.mediumReferenceVersion, 1)
+        self.assertEqual(
+            pydantic_to_jsonable(project)["mediumReferenceVersion"],
+            1,
+        )
+
+    def test_other_medium_reference_versions_are_rejected(self) -> None:
+        for version in (0, 2, -1, "1"):
+            with self.subTest(version=version):
+                with self.assertRaises(ValueError):
+                    ReactFlowProjectPayload(
+                        name="unsupported-medium-references",
+                        mediumReferenceVersion=version,
+                    )
+
+    def test_legacy_project_without_version_remains_compatible(self) -> None:
+        project = ReactFlowProjectPayload(name="legacy-project")
+
+        self.assertIsNone(project.mediumReferenceVersion)
+
+    def test_xml_export_adds_default_property_model_to_legacy_medium_node(self) -> None:
+        project = ReactFlowProjectPayload(
+            name="legacy-medium-node",
+            mediumReferenceVersion=1,
+            nodes=[
+                {
+                    "id": "air_1",
+                    "position": {"x": 10, "y": 20},
+                    "data": {
+                        "label": "Air 1",
+                        "componentType": "amesim_ideal_air_medium",
+                        "modelType": "amesim_ideal_air_medium",
+                        "ports": [],
+                        "parameters": {"gi": 1},
+                    },
+                }
+            ],
+        )
+
+        xml = build_reactflow_system_xml(project).decode("utf-8")
+
+        self.assertIn('<Parameter name="gi" value="1"', xml)
+        self.assertIn('<Parameter name="property_model" value="0.0"', xml)
+
+
+if __name__ == "__main__":
+    unittest.main()