From fc4d9c2aebdfad4ff1b8a04d93e16b036d845e56 Mon Sep 17 00:00:00 2001
From: Ian Bell <ian.h.bell@gmail.com>
Date: Mon, 4 May 2015 22:24:07 -0600
Subject: [PATCH] Force REFPROP tests to output the offset in helmholtz energy
 required

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
---
 src/Backends/REFPROP/REFPROPMixtureBackend.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Backends/REFPROP/REFPROPMixtureBackend.cpp b/src/Backends/REFPROP/REFPROPMixtureBackend.cpp
index c54e7c0f..95f38660 100644
--- a/src/Backends/REFPROP/REFPROPMixtureBackend.cpp
+++ b/src/Backends/REFPROP/REFPROPMixtureBackend.cpp
@@ -1524,6 +1524,11 @@ TEST_CASE("Check REFPROP and CoolProp values agree","[REFPROP]")
             double h_RP = S2->hmass();
             double s_RP = S2->smass();
 
+            double delta_a1 = (s_CP-s_RP)/(S1->gas_constant()/S1->molar_mass());
+            double delta_a2 = -(h_CP - h_RP)/(S1->gas_constant()/S1->molar_mass()*S1->get_reducing_state().T);
+            CAPTURE(delta_a1);
+            CAPTURE(delta_a2);
+
             CAPTURE(Name);
             CAPTURE(RPName);
             CAPTURE(h_CP);