zmk/app/tests/momentary-layer/1-normal/native_posix_64.keymap

#include <dt-bindings/zmk/keys.h>
#include <behaviors.dtsi>
#include <dt-bindings/zmk/kscan_mock.h>
#include "../behavior_keymap.dtsi"

/ {
    keymap {
        compatible = "zmk,keymap";

        default_layer {
            bindings = <
                &kp B &mo 1
                &none &none>;
        };

        layer_1 {
            bindings = <
                &kp C &trans
                &none &none>;
        };
    };
};

&kscan {
    events = <
        ZMK_MOCK_PRESS(0,1,10)
        ZMK_MOCK_PRESS(0,0,10)
        ZMK_MOCK_RELEASE(0,0,10)
        ZMK_MOCK_RELEASE(0,1,10)
    >;
};