Learning Redux

Testing failing requests

We also have to test another case - when the request fails. This happens, for example, when the user does not exist:

1. Edit __tests__/actions/users.test.js and add the following code to the describe('fetching user') block:

  test('dispatches FETCH_USER_FAILURE when fetching fails', () => {

2. We have to mock the API again. However, this time we return a 404 status code with an error message:

    const username = 'nonexistant'    const errorMsg = 'user not found'    nock('http://localhost:8080/')      .get(`/api/users/${username}`)      .reply(404, { error: errorMsg })

3. As before, we define our expected actions. This time, the second action should be FETCH_USER_FAILURE:

    const expectedActions = [ { type: actionTypes.FETCH_USER_REQUEST ...