spec/javascripts/lib/utils/file_upload_spec.js


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import fileUpload from '~/lib/utils/file_upload';

describe('File upload', () => {
  beforeEach(() => {
    setFixtures(`
      <form>
        <button class="js-button" type="button">Click me!</button>
        <input type="text" class="js-input" />
        <span class="js-filename"></span>
      </form>
    `);

    fileUpload('.js-button', '.js-input');
  });

  it('clicks file input after clicking button', () => {
    const btn = document.querySelector('.js-button');
    const input = document.querySelector('.js-input');

    spyOn(input, 'click');

    btn.click();

    expect(input.click).toHaveBeenCalled();
  });

  it('updates file name text', () => {
    const input = document.querySelector('.js-input');

    input.value = 'path/to/file/index.js';

    input.dispatchEvent(new CustomEvent('change'));

    expect(document.querySelector('.js-filename').textContent).toEqual('index.js');
  });
});