[io][restart] add default implementation and test

dumux/common/fvproblem.hh

@@ -490,6 +490,11 @@ public:
         }
     }
 
+    void applyRestartSolution(SolutionVector& sol) const
+    {
+        applyInitialSolutionImpl_(sol, std::integral_constant<bool, isBox>());
+    }
+
     /*!
      * \brief Evaluate the initial value for
      * an element (for cell-centered models)

test/porousmediumflow/2p/implicit/incompressible/CMakeLists.txt

@@ -10,6 +10,16 @@ dune_add_test(NAME test_2p_incompressible_tpfa
                                ${CMAKE_CURRENT_BINARY_DIR}/2p_tpfa-00008.vtu
                        --command "${CMAKE_CURRENT_BINARY_DIR}/test_2p_incompressible_tpfa test_2p.input -Problem.Name 2p_tpfa")
 
+# using tpfa
+dune_add_test(NAME test_2p_incompressible_tpfa_restart
+              SOURCES test_2p_fv.cc
+              COMPILE_DEFINITIONS TYPETAG=TwoPIncompressibleTpfa
+              COMMAND ${CMAKE_SOURCE_DIR}/bin/testing/runtest.py
+              CMD_ARGS --script fuzzy
+                       --files ${CMAKE_SOURCE_DIR}/test/references/lenscc-reference.vtu
+                               ${CMAKE_CURRENT_BINARY_DIR}/2p_tpfa_restart-00003.vtu
+                       --command "${CMAKE_CURRENT_BINARY_DIR}/test_2p_incompressible_tpfa_restart test_2p.input -Problem.Name 2p_tpfa_restart  -TimeLoop.DtInitial 526.62 -Restart.Time 1859.95 -Restart.File 2p_tpfa-00005.vtu")
+
 # using box
 dune_add_test(NAME test_2p_incompressible_box
               SOURCES test_2p_fv.cc