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path: root/spec/javascripts/dropzone_input_spec.js
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import $ from 'jquery';
import dropzoneInput from '~/dropzone_input';
import { TEST_HOST } from 'spec/test_constants';

const TEST_FILE = {
  upload: {},
};
const TEST_UPLOAD_PATH = `${TEST_HOST}/upload/file`;
const TEST_ERROR_MESSAGE = 'A big error occurred!';
const TEMPLATE = `<form class="gfm-form" data-uploads-path="${TEST_UPLOAD_PATH}">
  <textarea class="js-gfm-input"></textarea>
  <div class="uploading-error-message"></div>
</form>`;

describe('dropzone_input', () => {
  let form;
  let dropzone;
  let xhr;
  let oldXMLHttpRequest;

  beforeEach(() => {
    form = $(TEMPLATE);

    dropzone = dropzoneInput(form);

    xhr = jasmine.createSpyObj(Object.keys(XMLHttpRequest.prototype));
    oldXMLHttpRequest = window.XMLHttpRequest;
    window.XMLHttpRequest = () => xhr;
  });

  afterEach(() => {
    window.XMLHttpRequest = oldXMLHttpRequest;
  });

  it('shows error message, when AJAX fails with json', () => {
    xhr = {
      ...xhr,
      statusCode: 400,
      readyState: 4,
      responseText: JSON.stringify({ message: TEST_ERROR_MESSAGE }),
      getResponseHeader: () => 'application/json',
    };

    dropzone.processFile(TEST_FILE);

    xhr.onload();

    expect(form.find('.uploading-error-message').text()).toEqual(TEST_ERROR_MESSAGE);
  });

  it('shows error message, when AJAX fails with text', () => {
    xhr = {
      ...xhr,
      statusCode: 400,
      readyState: 4,
      responseText: TEST_ERROR_MESSAGE,
      getResponseHeader: () => 'text/plain',
    };

    dropzone.processFile(TEST_FILE);

    xhr.onload();

    expect(form.find('.uploading-error-message').text()).toEqual(TEST_ERROR_MESSAGE);
  });
});