Avoiding Mutations
Explore techniques to avoid state mutations in Redux reducers by using the deep-freeze library. Understand how freezing the initial state helps catch accidental state changes, ensuring reliable and maintainable tests. This lesson teaches you to maintain state integrity while testing Redux applications.
We'll cover the following...
We'll cover the following...
One key requirement is that our reducers never modify the state but only create a new one. Our current tests do not verify this behavior.
While we can try to catch these mistakes by manually verifying that the initial state did not change, a simpler approach would be to “freeze” the initial state and ...