add missing include

#include "test_main.h"

#include "test_config.h"

#include "test_config_reader.h"

#include "utils.h"

#include "gmock/gmock.h"

#include "gtest/gtest.h"

#include <mpi.h>

#include <vector>

using LAMMPS_NS::utils::split_words;

// common read_yaml_file function

bool read_yaml_file(const char *infile, TestConfig &config)

{

    }

    // handle arguments passed via environment variable

    std::vector<std::string> env = utils::split_words(getenv("TEST_ARGS"));

    std::vector<std::string> env = split_words(getenv("TEST_ARGS"));

    for (auto arg : env) {

        if (arg == "-u") {

            generate_yaml_file(argv[1], test_config);