修正test_mql事件窗口插值诊断

tests/test_amesim_pneumatic_components.py

@@ -55,6 +55,17 @@ class AmesimPneumaticComponentsTest(unittest.TestCase):
             delta=0.1,
         )
 
+    def test_pressure_transport_enthalpy_restores_absolute_energy_offset(self) -> None:
+        gas = HELIUM_PNEUMATIC_GAS
+        pressure = 13_839_965.0
+        temperature = 287.7322
+
+        self.assertAlmostEqual(
+            gas.pressure_transport_enthalpy(pressure, temperature),
+            gas.pressure_reference_enthalpy(pressure, temperature)
+            + gas.cp * 298.15,
+        )
+
     def test_reference_temperature_from_enthalpy_rejects_non_positive_cp(self) -> None:
         gas = AmesimPneumaticGas(cp=0.0, cv=3116.0)