[sim] Translate unit tests to catch2 (#9004)

simulation/halsim_ds_socket/src/test/native/cpp/main.cpp

@@ -2,13 +2,35 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#include <gtest/gtest.h>
+#include <string_view>
+
+#include <catch2/catch_session.hpp>
+#include <catch2/catch_test_macros.hpp>
 
 #include "wpi/hal/HAL.h"
 
-int main(int argc, char** argv) {
-  HAL_Initialize(500, 0);
-  ::testing::InitGoogleTest(&argc, argv);
-  int ret = RUN_ALL_TESTS();
-  return ret;
+namespace {
+
+bool IsCatchListCommand(int argc, char** argv) {
+  for (int i = 1; i < argc; ++i) {
+    std::string_view arg{argv[i]};
+    if (arg == "--list-tests" || arg == "--list-tags" ||
+        arg == "--list-reporters" || arg == "--list-listeners") {
+      return true;
+    }
+  }
+  return false;
+}
+
+}  // namespace
+
+TEST_CASE("HALSimDSSocket RuntimeType", "[simulation][halsim_ds_socket]") {
+  CHECK(HAL_RuntimeType::HAL_RUNTIME_SIMULATION == HAL_GetRuntimeType());
+}
+
+int main(int argc, char** argv) {
+  if (!IsCatchListCommand(argc, argv)) {
+    HAL_Initialize(500, 0);
+  }
+  return Catch::Session().run(argc, argv);
 }