Here we have a simple Node.js project called calculator.js.

We have some tests here that test the functionality which includes an add,

subtract, and divide function.

If you want to follow along hit the fork repo button and

then clone the repository down to your local machine.

Then jump into the calculator directory and

then install any dependencies.

Finally run the test suite.

You should have nine tests passing.

We've got three pending, which we'll implement later.

Now I'm going to create a branch.

You don't have to do this, this is an optional step but I'm going to do it for

the integration for Travis.

I'm gonna name a branch travis.

It could be named anything, it doesn't really matter.

And then open up the code editor of choice.

Mine is Visual Studio code.

Now let's head over to Travis CI.

I'm in the accounts page again and you can select your username, and if you're

part of any organization where you forked this repo to, you want select that.

In my case it's treehouse-projects/calculator.js.

For you, it may be your username and then calculator.js.

So the first step is to flick the switch to enable travis-ci on that repo.

So let's click on that project and here's the dashboard for the calculator.

As you can see there's no builds for this repository yet.

Let's read the docs and go to JavaScript and we can see a sample .travis.yml file.

Notice this dot here.

It needs that dot there or else it won't work.

So you can see here we've got a key, which is language, and

then the value is node_js.

And then it describes all the versions of node_js you want to test.

If you just include 6 without any minor or patch releases,

it will test the latest version of node_js.

So let's copy those three lines of code there, and head over to our editor.

And let's create our .travis.yml file, and

remember, make sure you've got that dot there.

Paste that in and then commit the code.

Git commit -m "Travis integration".

And then we can do git push, and then set the upstream to origin travis.

So now my local branch has been pushed to GitHub on the travis branch.

So we can go back now to our dashboard and

as you can see the Travis integration is now being tested.

This is the travis-ci building the dependencies for

node.js, and as you can see it's cloning the repo.

It's downloading the latest version of node.js, it's running npm

install, And testing.

And there's all our Mocha tests.

And it says the command npm test exited with 0.

Meaning, it's exited okay.

So the build is done and as you can see, our Travis integration has worked.

We also have this cool little icon up here saying the build passing.

You can actually include this in your documentation so you can click on this

markdown and then copy and paste this SVG and put that into your readme.

Now this is where I would merge the Travis branch into my master branch,

but since you're forking from my master, I'm gonna keep it separate for now.

In the next video, we're gonna take a look at when things go wrong.