验收四路模型并优化拓扑求解性能

tests/test_amesim_helium_medium.py

@@ -93,6 +93,21 @@ class AmesimHeliumPengRobinsonMediumTests(unittest.TestCase):
             delta=1.0e-8,
         )
 
+        medium.temperature_from_pressure_enthalpy.cache_clear()
+        first = medium.temperature_from_pressure_enthalpy(
+            pressure,
+            transport_enthalpy,
+        )
+        after_first = medium.temperature_from_pressure_enthalpy.cache_info()
+        second = medium.temperature_from_pressure_enthalpy(
+            pressure,
+            transport_enthalpy,
+        )
+        after_second = medium.temperature_from_pressure_enthalpy.cache_info()
+        self.assertEqual(second, first)
+        self.assertEqual(after_first.misses, 1)
+        self.assertEqual(after_second.hits, 1)
+
         density = medium.density(pressure, temperature)
         volume = 0.01
         properties = medium.properties_from_mU(
@@ -120,6 +135,28 @@ class AmesimHeliumPengRobinsonMediumTests(unittest.TestCase):
                 with self.assertRaises(RecoverableTrialStateError):
                     medium.properties_from_mU(-1.0, 1.0, 1.0)
 
+    def test_exact_repeated_real_gas_state_recovery_is_cached(self) -> None:
+        medium = AmesimHeliumPengRobinsonMedium()
+        pressure = 15.3e6
+        temperature = 293.15
+        volume = 0.057
+        mass = medium.density(pressure, temperature) * volume
+        internal_energy = mass * medium.specific_internal_energy_at_pressure(
+            pressure,
+            temperature,
+        )
+
+        first = medium.properties_from_mU(mass, internal_energy, volume)
+        second = medium.properties_from_mU(mass, internal_energy, volume)
+        changed = medium.properties_from_mU(
+            mass,
+            internal_energy,
+            volume * 1.01,
+        )
+
+        self.assertIs(second, first)
+        self.assertIsNot(changed, first)
+
     def test_amesim_2404_real_gas_isentropic_factor_reference(self) -> None:
         medium = AmesimHeliumPengRobinsonMedium()