01_setting_up_project.md

Setting up a project

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Learn to setup a Ruby project that connects to a database.

Introduction

In this series of challenges you will build a few different projects. Before we get started, you'll need to set up a new RSpec project.

This project will use a few components:

• Ruby and RSpec
  The programming language and test framework will be the same as what you've previously used.
• The pg gem
  This library allows us to send SQL queries to the database, and retrieve the result set.
• A class DatabaseConnection
  This class acts as a thin layer with methods to connect to PostgreSQL and send SQL queries to it.

To set up your project follow this guide.

Follow the guidance linked above to create a new project music_library. Then move on to the next step.

Demonstration

A video demonstration is here..

Setting up the test database

We don't want our RSpec tests to use and modify with the data used by our program users. Therefore we need to create a new database which will be used only by RSpec tests. Such a database is usually suffixed by _test. Let's create a test version of the music_library database:

# In your terminal

createdb music_library_test

Then make sure you connect to this database in your spec_helper.rb file:

# file: spec/spec_helper.rb

DatabaseConnection.connect('music_library_test')

Next Challenge

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