接入test_mql PN3节点管路闭合

tests/test_test_mql_pnl0001_segment.py

@@ -149,5 +149,94 @@ class TestMqlPnl0001PairChamberSegmentTests(unittest.TestCase):
         self.assertEqual([len(row) for row in solution.y], [3, 3, 3, 3, 3, 3])
 
 
+class TestMqlPn3NodeChamberSegmentTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.system = TestMqlSystem()
+        self.spec = self.system.discover_pneumatic_branch_topology().chamber_segment_specs[0]
+
+    def test_closure_replaces_outlet_boundary_with_real_pn3_node(self) -> None:
+        closure = self.system.pn3_node_chamber_segment_closure_from_spec(
+            self.spec,
+            inlet_node_pressure_pa=15.31e6,
+            resistance_boundary_pressure_pa=15.29e6,
+        )
+
+        snapshot = closure.snapshot()
+        rhs = closure.rhs(closure.initial_state_vector())
+
+        self.assertEqual(closure.components.inlet_line.name, "pneumatic_96")
+        self.assertEqual(closure.components.outlet_line.name, "pneumatic_97")
+        self.assertEqual(closure.components.node_line.name, "pneumatic_88")
+        self.assertEqual(closure.components.node_resistance.name, "pneumatic_100")
+        self.assertEqual(closure.components.node.alias, "pn_node3_9")
+        self.assertEqual(len(closure.initial_state_vector()), 10)
+        self.assertEqual(len(rhs), 10)
+        self.assertAlmostEqual(
+            snapshot.node_balance.pressure_pa,
+            snapshot.node_line_port_1.p,
+        )
+        self.assertAlmostEqual(
+            snapshot.node_balance.temperature_k,
+            snapshot.node_line_port_1.T,
+        )
+
+    def test_pn3_node_flow_cancels_between_adjacent_lines(self) -> None:
+        closure = self.system.pn3_node_chamber_segment_closure_from_spec(
+            self.spec,
+            inlet_node_pressure_pa=15.3e6,
+            resistance_boundary_pressure_pa=15.0e6,
+        )
+        state = closure.initial_state_vector()
+        state[4] *= 0.99
+        state[5] *= 0.99
+
+        snapshot = closure.snapshot(state)
+        rhs = closure.rhs(state)
+
+        self.assertGreater(snapshot.outlet_node_to_line_flow, 0.0)
+        self.assertGreater(snapshot.node_to_resistance_flow, 0.0)
+        self.assertAlmostEqual(
+            snapshot.node_balance.port_2_mass_flow_g_s,
+            (snapshot.outlet_node_to_line_flow + snapshot.node_to_resistance_flow)
+            * 1.0e3,
+        )
+        self.assertAlmostEqual(
+            snapshot.node_to_pnl0003_flow,
+            -(snapshot.outlet_node_to_line_flow + snapshot.node_to_resistance_flow),
+        )
+        self.assertAlmostEqual(
+            closure.components.node_line.port_1.m_flow,
+            snapshot.node_to_pnl0003_flow,
+        )
+        mass_derivative_sum = rhs[0] + rhs[2] + rhs[4] + rhs[6] + rhs[8]
+        self.assertAlmostEqual(
+            mass_derivative_sum,
+            (
+                snapshot.inlet_node_to_line_flow
+                + snapshot.pnl0003_port_2_flow
+                - snapshot.node_to_resistance_flow
+            ),
+            delta=1.0e-12,
+        )
+
+    def test_simulates_ten_state_pn3_node_chamber_segment(self) -> None:
+        solution = self.system.simulate_pn3_node_chamber_segment_from_spec(
+            self.spec,
+            inlet_node_pressure_pa=15.31e6,
+            resistance_boundary_pressure_pa=15.29e6,
+            config=SolveIVPConfig(
+                t_start=0.0,
+                t_stop=1.0e-8,
+                max_step=1.0e-9,
+            ),
+            t_eval=[0.0, 5.0e-9, 1.0e-8],
+        )
+
+        self.assertTrue(solution.success)
+        self.assertEqual(len(solution.t), 3)
+        self.assertEqual(len(solution.y), 10)
+        self.assertEqual([len(row) for row in solution.y], [3] * 10)
+
+
 if __name__ == "__main__":
     unittest.main()