<template>
    <div>
        <h1>Header</h1>
        <button class="hidden">Test</button>
    </div>
</template>

<script>
  export default {
    name: "Foo"
  }
</script>

<style scoped>
    .hidden {
        display: none;
    }
</style>

describe('Foo.vue', () => {
  test('Button', () => {
    const wrapper = shallowMount(Foo, {});
    console.log(wrapper.isVisible());
    const but = wrapper.find('button');
    console.log(window.getComputedStyle(but.element).display);
    console.log(but.isVisible());
  });
});