added MN linesource test case

code/tests/input/linesource_MN.cfg

+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%  Linesource Benchmarking File MN     %
+%  Author <Steffen Schotthöfer>		   %
+%  Date   01.07.2020                   %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% ---- File specifications ----
+OUTPUT_DIR = ../../result
+OUTPUT_FILE = rtsn_test_linesource_MN
+LOG_DIR = ../../result/logs
+MESH_FILE = linesource.su2
+
+% ---- Solver specifications ----
+CFL_NUMBER = 0.5
+TIME_FINAL = 0.3
+PROBLEM = LINESOURCE
+SOLVER = MN_SOLVER
+MAX_MOMENT_SOLVER = 2
+ENTROPY_FUNCTIONAL = QUADRATIC
+ENTROPY_OPTIMIZER = NEWTON
+%
+% ---- Boundary Conditions ----
+BC_DIRICHLET = ( void )
+
+QUAD_TYPE = GAUSS_LEGENDRE_TENSORIZED
+QUAD_ORDER = 2
+

code/tests/input/linesource_PN.cfg

+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%  Linesource Benchmarking File PN     %
+%  Author <Steffen Schotthöfer>		   %
+%  Date   01.07.2020                   %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % ---- File specifications ----
 OUTPUT_DIR = ../../result
 OUTPUT_FILE = rtsn_test_linesource_PN

code/tests/input/linesource.cfg → code/tests/input/linesource_SN.cfg

+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%  Linesource Benchmarking File MN     %
+%  Author <Steffen Schotthöfer>		   %
+%  Date   01.07.2020                   %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % ---- File specifications ----
 OUTPUT_DIR = ../../result
 OUTPUT_FILE = rtsn_test_linesource

code/tests/test_cases.cpp

@@ -81,3 +81,21 @@ TEST_CASE( "linesource_PN", "[testcases]" ) {
         REQUIRE( std::fabs( test[i] - reference[i] ) < eps );
     }
 }
+
+TEST_CASE( "linesource_MN", "[testcases]" ) {
+    char config_file_name[MAX_STRING_SIZE] = "../tests/input/linesource_MN.cfg";
+
+    Config* config = new Config( config_file_name );
+    Solver* solver = Solver::Create( config );
+    solver->Solve();
+    solver->Save();
+
+    auto test      = readVTKFile( "../result/rtsn_test_linesource_PN.vtk" );
+    auto reference = readVTKFile( "../tests/input/linesource_MN_reference.vtk" );
+
+    double eps = 1e-3;
+    REQUIRE( test.size() == reference.size() );
+    for( unsigned i = 0; i < test.size(); ++i ) {
+        REQUIRE( std::fabs( test[i] - reference[i] ) < eps );
+    }
+}