feat(global_parameter_loader): add gtest to global parameter loader

common/global_parameter_loader/CMakeLists.txt

@@ -4,6 +4,11 @@ project(global_parameter_loader)
 find_package(autoware_cmake REQUIRED)
 autoware_package()
 
+if(BUILD_TESTING)
+  file(GLOB_RECURSE test_files test/*.cpp)
+  ament_add_ros_isolated_gtest(test_global_params_launch ${test_files})
+endif()
+
 ament_auto_package(
   INSTALL_TO_SHARE
     launch

common/global_parameter_loader/package.xml

@@ -12,6 +12,7 @@
 
   <exec_depend>vehicle_info_util</exec_depend>
 
+  <test_depend>ament_cmake_ros</test_depend>
   <test_depend>ament_lint_auto</test_depend>
   <test_depend>autoware_lint_common</test_depend>
 

common/global_parameter_loader/test/test_global_params_launch.cpp

@@ -0,0 +1,44 @@
+// Copyright 2023 The Autoware Foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <gtest/gtest.h>
+
+#include <cstdlib>
+#include <iostream>
+#include <string>
+
+TEST(TestLaunchFile, test_launch_file)
+{
+  // Define the path of Python launch file
+  std::string global_params_launch_path = "global_params.launch.py";
+
+  // Define the parameters you want to pass to the launch file
+  std::string use_sim_time_param = "false";
+  std::string vehicle_model_param = "sample_vehicle";
+  // Construct the command to run the Python launch script with parameters
+  std::string command = "ros2 launch global_parameter_loader " + global_params_launch_path +
+                        " use_sim_time:=" + use_sim_time_param +
+                        " vehicle_model:=" + vehicle_model_param;
+
+  // Use the system() function to execute the command
+  int result = std::system(command.c_str());
+  // Check the result of running the launch file
+  EXPECT_EQ(result, 0);
+}
+
+int main(int argc, char * argv[])
+{
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}