All language subtitles for 005 Understanding the Technical Setup & Involved Tools_en

But of course there is another important question;

we now have I have a rough idea of why we need tests

and we know that tests are code

that then tests our Abra code,

but where do we write this code

and how do we execute this testing code?

For this, we need some extra tools and an extra setup.

And um, specifically we need a tool

for running our testing code

and for asserting the results.

So for determining whether some result can be seen

as a success, or if a test failed with a given result,

we need a tool that does debt.

And then in our react app, we also need a way

of simulating of rendering our react app and components

for those automated tests to then interact with them.

So we need to simulate the browser, so to say.

Now, for the first part for running our testing code

and asserting the results, we typically use Jest.

It's not the only tool for this job

but it's very popular, especially for react

and it's easy to use.

Now for simulating and rendering our components

and the react app,

we typically use the react testing library these days.

And both these tools are already installed

and set up for you,

when you work in a project

created with create react app.

Here, I got such an example, project.

You'll also fined this project attached

and in there we'll have a look at the code later.

If we have a look at package jason

we see those testing library packages,

which are part of this project.

And I did not install those.

They were part of a newly created react project,

created with create react app automatically;

out of the box.

Now, what we don't see here is jest

we only see this jest-dom testing library, sub package

but I can tell you that it's also

part of this project, just as a dependency

of one of those other dependencies, basically.

And therefore, in such a brand new project

like the one which you find attached,

everything is already set up for you to run your tests,

and therefore that's what we're going to do next.

We're going to run our first test

and understand how that works.