9

Testing an MEVN Application

Let's do a quick recap of what we have done so far in previous chapters:

We created different Vue components for different pages

We implemented Vuex—centralized state management for Vue.js applications,

and defined state, getters, mutations, and actions for the components

We created controllers and models to interact with the Node.js backend

In this chapter, we will discuss how to write test code to make sure that everything in the

application works well. Writing test code is an integral part of any application. It helps to
ensure that the functionalities that we have written do not break, and maintains the quality

of the code we write.

Different practices can be followed while writing tests. It's always a good practice to write

test code first, before writing the actual code. Writing tests ensures that our application will

not break and everything will work as expected.

This helps us to write better code and also helps to reveal the potential problems before

they arise.

Benefits of writing tests

Writing test code when developing an application has a lot of benefits. Some of them are as

follows:

Ensures code works as expected: It helps to ensure that each piece of

functionality that we have written in our application works exactly as expected.

Improves the quality of code: It improves the quality of code. Since writing

test code helps to pre-empt defects that may arise, before we write actual code, it

improves the quality of the code.