How do I handle errors in async testing with Redux?

How do I handle errors in async testing with Redux?

To handle errors in async testing with Redux, you can use middleware like Redux Thunk or Redux Saga. These allow you to manage async actions and catch errors effectively.

Can you give me an example of how to implement error handling?

Sure! If you're using Redux Thunk, you can dispatch an error action in your async function when an error occurs. Here's a simple example:

const fetchData = () => async (dispatch) => {
  try {
    const response = await fetch('your-api-url');
    const data = await response.json();
    dispatch({ type: 'FETCH_SUCCESS', payload: data });
  } catch (error) {
    dispatch({ type: 'FETCH_ERROR', error: error.message });
  }
};

What should I do in my reducer when an error occurs?

In your reducer, you can handle the error action by updating the state to reflect the error. For example:

const initialState = { data: null, error: null };

const reducer = (state = initialState, action) => {
  switch (action.type) {
    case 'FETCH_SUCCESS':
      return { ...state, data: action.payload, error: null };
    case 'FETCH_ERROR':
      return { ...state, error: action.error };
    default:
      return state;
  }
};