axios/test/specs/formdata.spec.js

import { retryNetwork } from '../helpers/retry.js';

describe('FormData', function () {
  it('should allow FormData posting', async () => {
    await retryNetwork(() => {
      return axios
        .postForm(TEST_SERVER_URL, {
          a: 'foo',
          b: 'bar',
        })
        .then(({ data }) => {
          expect(data.form).toEqual({
            a: 'foo',
            b: 'bar',
          });
        });
    });
  });
});