验收四路模型并优化拓扑求解性能

tests/test_amesim_mechanical_xml.py

@@ -10,6 +10,7 @@ from app.main import (
     reactflow_project_storage_data,
     run_system_xml_simulation,
 )
+from app.simulation.systems.generic import GenericFluidSystem
 from app.system_xml import validate_system_xml_document
 from tests.test_amesim_pnvo001_signal_xml import signal_edge, signal_port
 from tests.test_generic_system_xml_simulation import component_node, physical_edge
@@ -287,6 +288,16 @@ def force_node_mass_project() -> ReactFlowProjectPayload:
 
 
 class AmesimMechanicalXmlTests(unittest.TestCase):
+    def test_mechanical_states_use_machine_scale_absolute_tolerances(self) -> None:
+        system = GenericFluidSystem(
+            compile_reactflow_network(zero_force_mass_project())
+        )
+
+        tolerances = system.mechanical_state_reducer.absolute_tolerances(1.0e-8)
+
+        self.assertEqual(tolerances, [1.0e-12, 1.0e-12])
+        self.assertEqual(len(tolerances), len(system.initial_state_vector()))
+
 
     def test_sparse_legacy_reactflow_mecmas_defaults_are_canonicalized(
         self,