redux-mock-store VS mocha

To fix this, the simple way is to mock a redux store. I need to install redux-mock-store and its typing:

For a long time I relied on redux mock store to preload data into my components for rendering during tests. This approach makes it easy to take a snapshot of a component with arbitrary data and ensure that it renders correctly. Where it completely fails is testing interactions.

Redux Toolkit includes a configureStore method that allows you to preload it with state. The createStore method in redux includes this option as well. In the old days I would rely on tools like redux mock store to generate redux stores for testing, but you don't need it. You can generate a store for your tests that includes exactly the same reducers as your app, but also comes pre-loaded with whatever state you need for your tests.

The above example checks the actions executed by someThunkFunction. The mockStore function used in the example comes from the redux-mock-store library.

Using something like Vitest, Jest, or Mocha didn't work because:

MochaJS is a feature-rich JavaScript test framework running on Node.js, making it a popular choice for both backend and frontend testing. It's known for its flexibility and straightforward syntax, allowing for asynchronous testing and the use of any assertion library.

We use Jest Framework for testing. Jest is not a dogma, and, of course, in its place can be any other test runner, such as Mocha or Ava. Let's focus on tests. I'll provide a short example because I don’t want to waste your time. You can find the full version here. It's crucial to read the comments in the code below. Let's go!

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