It will print to console output with a us timestamp and a gtest friendly format in green colour. E.g. LOG_INFO << "result: " << result;

log_utils.h

#include <iostream>
#include <iomanip>
#include <chrono>

#define Color_Off "\033[0m"
#define Black "\033[1;30m"
#define Red "\033[1;31m"
#define Green "\033[1;32m"
#define Yellow "\033[1;33m"
#define Blue "\033[1;34m"
#define Purple "\033[1;35m"
#define Cyan "\033[1;36m"
#define White "\033[1;37m"

// For print green messages in google test output
class GTestLoggerCout : public std::stringstream {
public:
    GTestLoggerCout(const std::string &colour): m_colour(colour) {}
    ~GTestLoggerCout() {
        static auto start = std::chrono::high_resolution_clock::now();
        auto end = std::chrono::high_resolution_clock::now();
        std::cout << m_colour << "[          ] " <<
        "[" << std::setfill('0') << std::setw(6) << 
        std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count() << " ms] " <<
        str() << Color_Off << std::endl;
    }
    std::string m_colour;
};
#define LOG_INFO GTestLoggerCout(Green)
#define LOG_WARN GTestLoggerCout(Purple)
#define LOG_ERROR GTestLoggerCout(Red)
//////////////////////