In this chapter, we have broken up our monolithic application into many smaller modules, and implemented all the requirements for our Create User feature. We integrated JSON Schema and Ajv into our validation modules, which forced us to be more consistent with the structure of our error messages. This, in turn, improves the experience of our end users.
In the next chapter, we will use Mocha and Sinon to write unit and integration tests, which will strengthen the confidence we have in our code.
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