Improve Catch2 integration

Mainly dealing with outputs

tests/mpi_test_main.cpp

@@ -33,6 +33,13 @@ main(int argc, char* argv[])
   Catch::Session session;
   int result = session.applyCommandLine(argc, argv);
 
+  if (result == 0) {
+    const auto& config = session.config();
+    if (config.listReporters() or config.listTags() or config.listTestNamesOnly() or config.listTests()) {
+      if (parallel::rank() == 0) {
+        session.run();
+      }
+    } else {
       if (parallel::rank() != 0) {
         // Disable outputs for ranks != 0
         setenv("GCOV_PREFIX", gcov_prefix.string().c_str(), 1);
@@ -43,7 +50,6 @@ main(int argc, char* argv[])
         session.useConfigData(data);
       }
 
-  if (result == 0) {
       // Disable outputs from tested classes to the standard output
       std::cout.setstate(std::ios::badbit);
 
@@ -78,6 +84,7 @@ main(int argc, char* argv[])
       MeshDataManager::destroy();
       SynchronizerManager::destroy();
     }
+  }
 
   Kokkos::finalize();
   parallel::Messenger::destroy();

tests/test_main.cpp

@@ -21,6 +21,10 @@ main(int argc, char* argv[])
   int result = session.applyCommandLine(argc, argv);
 
   if (result == 0) {
+    const auto& config = session.config();
+    if (config.listReporters() or config.listTags() or config.listTestNamesOnly() or config.listTests()) {
+      result = session.run();
+    } else {
       // Disable outputs from tested classes to the standard output
       std::cout.setstate(std::ios::badbit);
 
@@ -40,9 +44,10 @@ main(int argc, char* argv[])
       MeshDataManager::destroy();
       SynchronizerManager::destroy();
     }
+  }
 
   Kokkos::finalize();
   parallel::Messenger::destroy();
-  std::cout << "finalizing\n";
+
   return result;
 }