在bootstrap-vue mode(b-mode)int测试中找不到按钮

2022-03-02 00:00:00 vue.js bootstrap-modal bootstrap-4 bootstrap-vue vue-test-utils

我要在我的测试用例中测试模式行为。

打开页面上的模式依据按钮(isVisible false=>true)
关闭MODEL上的MODEL BY按钮(isVisible trye=>false)

第一步可以，但第二步失败。我可以通过引用找到MODEL，但找不到MODEL上的按钮。

Home.vue

<template>
  <div class="home">
    <b-button id='button-open' @click="open">open</b-button>
    <b-modal
      ref="modal-ref"
      hide-footer
    >
      <b-button id='button-close' @click="close">close</b-button>
    </b-modal>
  </div>
</template>


<script>
export default {
  methods: {
    open() {
      console.log('open');
      this.$refs['modal-ref'].show();
    },
    close() {
      console.log('ok');
      this.$refs['modal-ref'].hide();
    },
  },
};
</script>

home.spec.js

import { expect } from 'chai';
import { createLocalVue, mount } from '@vue/test-utils';
import BootstrapVue from 'bootstrap-vue';
import Home from '@/views/Home.vue';

describe('Boostrap Modal', () => {
  it('open and close modal', async () => {
    const localVue = createLocalVue();
    localVue.use(BootstrapVue);
    const wrapper = mount(Home, {
      localVue,
      attachToDocument: true,
    });

    const open = wrapper.find('#button-open');
    const modal = wrapper.find({ ref: 'modal-ref' });
    expect(modal.vm.isVisible).to.equal(false);
    open.trigger('click');
    await wrapper.vm.$nextTick();
    console.log(modal.exists());
    expect(modal.vm.isVisible).to.equal(true);

    // find it from modal
    const close = modal.find('#button-close');
    expect(close.exists()).to.equal(true);
    close.trigger('click');

    await wrapper.vm.$nextTick();
    expect(modal.vm.isVisible).to.equal(false);
    wrapper.destroy();
  });
});

我弄不明白为什么找不到关闭按钮。 (close.exists()=>false)

解决方案

默认情况下导入模态以附加到<body>元素。并且在显示时不会在您的包装内。

您需要查询document才能找到您的按钮：

import { expect } from 'chai';
import { createLocalVue, mount, createWrapper } from '@vue/test-utils';
import BootstrapVue from 'bootstrap-vue';
import Home from '@/views/Home.vue';

describe('Boostrap Modal', () => {
  it('open and close modal', async () => {
    const localVue = createLocalVue();
    localVue.use(BootstrapVue);
    const wrapper = mount(Home, {
      localVue,
      attachToDocument: true,
    });

    const open = wrapper.find('#button-open');
    const modal = wrapper.find({ ref: 'modal-ref' });
    expect(modal.vm.isVisible).to.equal(false);
    open.trigger('click');
    await wrapper.vm.$nextTick();
    await wrapper.vm.$nextTick();
    console.log(modal.exists());
    expect(modal.vm.isVisible).to.equal(true);

    // find it from modal close button in the document
    const closeElement = document.getElementById('button-close');
    expect(closeElement).toBeDefined();
    const closeWrapper = createWrapper(closeElement);
    expect(closeWrapper.exists()).to.equal(true);
    expect(closeWrapper.is('button')).toBe(true);
    closeWrapper.trigger('click');

    await wrapper.vm.$nextTick();
    await wrapper.vm.$nextTick();
    expect(modal.vm.isVisible).to.equal(false);
    wrapper.destroy();
  });
});

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