add float variant for flow blackoil

CMakeLists.txt

@@ -736,6 +736,18 @@ if (BUILD_FLOW)
     PASS_REGULAR_EXPRESSION "${${project}_LABEL}")
 endif()
 
+if(BUILD_FLOW_FLOAT_VARIANTS)
+  opm_add_test(flow_blackoil_float
+    ONLY_COMPILE
+    ALWAYS_ENABLE
+    DEFAULT_ENABLE_IF ${FLOW_DEFAULT_ENABLE_IF}
+    DEPENDS opmsimulators
+    LIBRARIES opmsimulators
+    SOURCES
+    flow/flow_blackoil_float_main.cpp
+    $<TARGET_OBJECTS:moduleVersion>)
+endif()
+
 if (OPM_ENABLE_PYTHON)
   add_subdirectory(python)
 endif()

flow/flow_blackoil_float_main.cpp

@@ -0,0 +1,38 @@
+/*
+  Copyright 2020, NORCE AS
+
+  This file is part of the Open Porous Media project (OPM).
+
+  OPM is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  OPM is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <config.h>
+
+#include <opm/simulators/flow/Main.hpp>
+#include <flow/flow_blackoil.hpp>
+
+namespace Opm::Properties {
+
+template<class TypeTag>
+struct Scalar<TypeTag, TTag::FlowProblemTPFA> {
+    using type = float;
+};
+
+}
+
+int main(int argc, char** argv)
+{
+    using TypeTag = Opm::Properties::TTag::FlowProblemTPFA;
+    auto mainObject = Opm::Main(argc, argv);
+    return mainObject.runStatic<TypeTag>();
+}

regressionTests.cmake

@@ -1497,3 +1497,10 @@ if(dune-alugrid_FOUND AND BUILD_FLOW_ALU_GRID)
                            DIR spe1)
 endif()
 
+if(BUILD_FLOW_FLOAT_VARIANTS)
+  add_test_compareECLFiles(CASENAME spe1_float
+                           FILENAME SPE1CASE1
+                           SIMULATOR flow_blackoil_float
+                           ABS_TOL ${abs_tol}
+                           REL_TOL ${rel_tol})
+endif()