axios/test/specs/core/transformData.spec.js

import transformData from '../../../lib/core/transformData';

describe('core::transformData', function () {
  it('should support a single transformer', function () {
    let data;

    data = transformData.call({}, function (data) {
      data = 'foo';
      return data;
    });

    expect(data).toEqual('foo');
  });

  it('should support an array of transformers', function () {
    let data = '';
    data = transformData.call({ data }, [
      function (data) {
        data += 'f';
        return data;
      },
      function (data) {
        data += 'o';
        return data;
      },
      function (data) {
        data += 'o';
        return data;
      },
    ]);

    expect(data).toEqual('foo');
  });

  it('should support reference headers in transformData', function () {
    const headers = {
      'content-type': 'foo/bar',
    };
    let data = '';
    data = transformData.call({ data, headers }, [
      function (data, headers) {
        data += headers['content-type'];
        return data;
      },
    ]);

    expect(data).toEqual('foo/bar');
  });

  it('should support reference status code in transformData', function () {
    let data = '';
    data = transformData.call(
      {},
      [
        function (data, headers, status) {
          data += status;
          return data;
        },
      ],
      { data, status: 200 }
    );

    expect(data).toEqual('200');
  });
});