salix-front/test/jest/__tests__/demo/MyButton.ts

import { defineComponent, ref } from 'vue';

export default defineComponent({
    name: 'MyButton',
    props: {
        incrementStep: {
            type: Number,
            default: 1,
        },
    },
    setup(props) {
        const counter = ref(0);
        const input = ref('rocket muffin');
        function increment() {
            counter.value += props.incrementStep;
        }

        return { counter, input, increment };
    },
});