element-ui/test/unit/specs/skeleton.spec.js

import Skeleton from 'packages/skeleton';
import { createTest, destroyVM, createVue, waitImmediate, wait} from '../util';

const content = 'content';

describe('Skeleton.vue', () => {
  let vm;

  afterEach(() => {
    destroyVM(vm);
  });

  it('render test', () => {
    vm = createTest(Skeleton, true);
    const el = vm.$el;
    expect(el.querySelectorAll('.el-skeleton__p').length).to.equal(4);
    expect(Array.from(el.children[0].classList)).to.contain('el-skeleton');

  });

  it('should render with animation', () => {
    vm = createTest(Skeleton, {
      animated: true
    }, true);

    const el = vm.$el;

    expect(Array.from(el.children[0].classList)).to.contain('is-animated');
  });

  it('should render x times', async() => {
    vm = createVue(
      {
        template: `
        <el-skeleton :count="count"></el-skeleton>
      `,
        data() {
          return {
            count: 1
          };
        }
      },
      true
    );

    const wrapper = vm.$el;
    expect(wrapper.querySelectorAll('.el-skeleton__p').length).to.equal(4);

    vm.count = 2;

    await waitImmediate();
    expect(wrapper.querySelectorAll('.el-skeleton__p').length).to.equal(8);
  });

  it('should render x rows', () => {
    vm = createTest(Skeleton, {
      rows: 5
    }, true);

    expect(vm.$el.querySelectorAll('.el-skeleton__p').length).to.equal(5);
  });

  it('should render default slots', () => {
    vm = createVue(
      {
        template: `
        <el-skeleton :loading="loading">{{content}}</el-skeleton>
      `,
        data() {
          return {
            loading: false,
            content
          };
        }
      }, true);
    expect(vm.$el.textContent).to.be.equal(content);
  });

  it('should render template slots', () => {
    vm = createVue(
      {
        template: `
        <el-skeleton :loading="loading"><template slot="template">{{content}}</template></el-skeleton>
      `,
        data() {
          return {
            loading: true,
            content
          };
        }
      }, true);
    expect(vm.$el.querySelector('.el-skeleton').textContent).to.be.equal(content);
  });

  it('should throttle rendering', async() => {
    vm = createTest(Skeleton, {
      throttle: 500
    }, true);

    expect((vm).uiLoading).to.be.equal(false);
    await wait(600);

    expect(vm.uiLoading).to.be.equal(true);
  });

});