Add tests for CommunicatorManager

src/utils/CommunicatorManager.hpp

@@ -8,6 +8,8 @@ class CommunicatorManager
  private:
   static std::optional<int> s_split_color;
 
+  friend void resetCommunicationManagerForTests();
+
  public:
   static bool hasSplitColor();
   static int splitColor();

tests/CMakeLists.txt

@@ -61,6 +61,7 @@ add_executable (unit_tests
   test_CastArray.cpp
   test_CellIntegrator.cpp
   test_CellType.cpp
+  test_CommunicatorManager.cpp
   test_ConsoleManager.cpp
   test_CG.cpp
   test_ConcatExpressionProcessor.cpp

tests/test_CommunicatorManager.cpp

+#include <catch2/catch_test_macros.hpp>
+#include <catch2/matchers/catch_matchers_all.hpp>
+
+#include <utils/CommunicatorManager.hpp>
+
+// clazy:excludeall=non-pod-global-static
+
+inline void
+resetCommunicationManagerForTests()
+{
+  CommunicatorManager::s_split_color.reset();
+}
+
+TEST_CASE("CommunicatorManager", "[utils]")
+{
+  resetCommunicationManagerForTests();
+
+  REQUIRE(not CommunicatorManager::hasSplitColor());
+#ifndef NDEBUG
+  REQUIRE_THROWS_WITH(CommunicatorManager::splitColor(), "split color has not been defined");
+#endif   // NDEBUG
+
+  REQUIRE_NOTHROW(CommunicatorManager::setSplitColor(2));
+  REQUIRE(CommunicatorManager::splitColor() == 2);
+
+#ifndef NDEBUG
+  REQUIRE_THROWS_WITH(CommunicatorManager::setSplitColor(2), "split color has already been defined");
+#endif   // NDEBUG
+}