Install Minitest #

For this book we’re going to use Minitest as the testing framerwork. There are another alternatives like RSpec but for the sake of simplicity I prefer to use Minitest.

How to install Minitest #

In order to add a new library in our project we just need to add them in the Gemfile file:

# Gemfile
source "https://rubygems.org"

gem "minitest"

After that we need to install it using the following command:

bundle install

If everything works fine now we’re in a position to create our first test.

Validate Minitest is installed #

You can find all the code for this chapter here

Once you have Minitest installed you need to create a new file called test_foo.rb inside the src folder with the following code (right now don’t care about it!):

require "minitest/autorun"

class TestFoo < Minitest::Test
  def test_foo
    assert_equal 1, 1
  end
end

Save the file and run the following command in the terminal:

ruby tests/test_foo.rb

You should see something like these results:

Run options: --seed 6109

# Running:

.

Finished in 0.000829s, 1206.0617 runs/s, 1206.0617 assertions/s.
1 runs, 1 assertions, 0 failures, 0 errors, 0 skips