Before you start a tutorial

These are the steps you must do before you can run the tutorials for the To-Do service.

Expect this preparation to take about 20 minutes to complete.

Preparing for the tutorials

To complete the tutorials in this section, you need the following. You might want to open the links in separate browser tabs before you start installing the software.

A GitHub account
A development system running a current version or a long-term support, also known as LTS, version of the Windows, MacOS, or Linux operating system.
The following software on your development system:
- Git, command line
- GitHub Desktop. This is optional, but recommended.
- A fork of the To-Do-Service repository
- A current or LTS version of node.js
- Version 0.17.4 of json-server
- A current copy of the database file. You can get this by syncing your fork.
  
  Tip: if you’re using a fork of the repository, create a working branch in which to do your tutorials. Create a new branch for each tutorial to prevent a mistake in one from affecting your work in another.
- The Postman desktop app. Because you run the To-Do service on your development system with an http://localhost host name, the web-version of Postman can’t perform the exercises.
- The Postman desktop app. Because you run the To-Do service on your development system with an http://localhost host name, the web-version of Postman can’t perform the exercises.

Test your development system

To test your development system:.

Create and checkout a test branch of your fork of the To-Do-service repository. Your GitHub repository workspace is the directory that contains your fork of the to-do-service-au25 repository.
```
 cd <your GitHub repository workspace>
 ls
 # (see the to-do-service directory in the list)
 cd to-do-service-au25
 git checkout -b tutorial-test
 cd api
 json-server -w to-do-db-source.json
```
If you installed the software correctly, you should see the service start and display the URL of the service: http://localhost:3000.
Make a test call to the service.
```
 curl http://localhost:3000/users
```

If the service is running correctly, you should see a list of users from the service, such as in this example.

 [
     {
         "last_name": "Smith",
         "first_name": "Ferdinand",
         "email": "f.smith@example.com",
         "id": 1
     },
     {
         "last_name": "Jones",
         "first_name": "Jill",
         "email": "j.jones@example.com",
         "id": 2
     },
     ...

You should see the list of users. If you receive an error in any step of the procedure, investigate, and correct the error before continuing. Some common situations that cause errors include:

You mistyped a command.
You aren’t in the correct directory.
A required software component didn’t install correctly.
A required software component isn’t up to date.

If you see the list of users from the service, you’re ready to do the Tutorials.