apu.rs

    }

    #[test]
    fn test_trigger_ch4() {
        let mut apu = Apu {
            ch4_divisor: 3,
            ch4_clock_shift: 2,
            ..Default::default()
        };
        apu.trigger_ch4();

        assert_eq!(apu.ch4_timer, 192);
        assert_eq!(apu.ch4_lfsr, 0x7ff1);
        assert_eq!(apu.ch4_envelope_sequence, 0);
    }
}