Function millis

tests/Arduino.h:19–23

Mock Arduino timing functions

// Mock Arduino timing functions
inline unsigned long millis() {
    static auto start = std::chrono::steady_clock::now();
    auto now = std::chrono::steady_clock::now();
    return std::chrono::duration_cast<std::chrono::milliseconds>(now - start).count();
}

inline unsigned long micros() {
    static auto start = std::chrono::steady_clock::now();