use gemma::chip8::sound_timer::SoundTimer;

/// Tests for The Sound Timer
///
///

#[test]
fn sound_timer_default() {
    let x = SoundTimer::default();
    assert_eq!(x.current(), 0);
}

#[test]
fn sound_timer_ticks_reduce_time() {
    let mut st = SoundTimer::new();
    st.set_timer(100);
    st.tick();
    st.tick();
    st.tick();
    assert_eq!(st.current(), 97);
}

#[test]
fn sound_timer_out_of_ticks_works() {
    let mut st = SoundTimer::new();
    st.set_timer(0);
    st.tick();
    st.tick();
    st.tick();
    assert_eq!(st.current(), 0);
}