Add test for Mass Lumping in BeierSandbox-Benchmark

ProcessLib/HeatTransportBHE/Tests.cmake

@@ -124,6 +124,20 @@ AddTest(
     beier_sandbox_ts_10_t_600.000000.vtu beier_sandbox_algebraic_bc_ts_10_t_600.000000.vtu temperature_soil temperature_soil 0 5e-10
 )
 
+AddTest(
+    NAME HeatTransportBHE_1U_3D_MassLumping
+    PATH Parabolic/T/3D_Beier_sandbox
+    EXECUTABLE ogs
+    EXECUTABLE_ARGS beier_sandbox_MassLumping.xml
+    WRAPPER time
+    TESTER vtkdiff
+    REQUIREMENTS NOT OGS_USE_MPI
+    RUNTIME 20
+    DIFF_DATA
+    beier_sandbox_ts_10_t_600.000000.vtu beier_sandbox_mass_lumping_ts_10_t_600.000000.vtu temperature_BHE1 temperature_BHE1 0 1e-6
+    beier_sandbox_ts_10_t_600.000000.vtu beier_sandbox_mass_lumping_ts_10_t_600.000000.vtu temperature_soil temperature_soil 0 1e-4
+)
+
 AddTest(
     NAME HeatTransportBHE_1U_beier_sandbox_fixed_power_constant_flow
     PATH Parabolic/T/3D_Beier_sandbox

Tests/Data/Parabolic/T/3D_Beier_sandbox/beier_sandbox_MassLumping.xml

+<?xml version="1.0" encoding="ISO-8859-1"?>
+<OpenGeoSysProjectDiff base_file="beier_sandbox.prj">
+    <add sel="/*/processes/process">
+        <mass_lumping>true</mass_lumping>
+    </add>
+    <replace sel="/*/time_loop/output/prefix/text()">beier_sandbox_mass_lumping</replace>
+</OpenGeoSysProjectDiff>