@transferwise/approve-api-action-helpers/src/http.spec.js

An http client that handles SCA protected requests gracefully

import { http } from './http';

const defaultHeaders = {
  'Content-Type': 'application/json',
};
const resJson = jest.fn(() => 'parsed json');
// eslint-disable-next-line jest/prefer-lowercase-title
describe('HTTP Client', () => {
  beforeEach(() => {
    fetch.resetMocks();

    fetch.mockResolvedValue({
      json: resJson,
      ok: true,
    });

    // eslint-disable-next-line jest/no-standalone-expect
    expect(fetch).not.toHaveBeenCalled();
  });

  describe('http method', () => {
    it('calls fetch with whatever parameters were passed to it', async () => {
      await http('IM A URL', { isParam: true, method: 'GET' });

      expect(fetch).toHaveBeenCalledWith('IM A URL', {
        isParam: true,
        headers: defaultHeaders,
        method: 'GET',
      });
    });

    it('passes params.headers through the headers object', async () => {
      await http('IM A URL', {
        headers: {
          'X-Header-Key': 'this is a value',
        },
        method: 'UPDATE',
      });

      expect(fetch).toHaveBeenCalledWith('IM A URL', {
        headers: {
          ...defaultHeaders,
          'X-Header-Key': 'this is a value',
        },
        method: 'UPDATE',
      });
    });

    it('throws an http error if res.ok is not true', async () => {
      fetch.mockResolvedValue({
        ok: false,
      });

      await expect(
        http('IM A URL', {
          method: 'POST',
        }),
      ).rejects.toThrow(); // eslint-disable-line jest/require-to-throw-message
    });
  });
});