Effective Testing with RSpec 3

Customizing Your Specs’ Output

When you use RSpec on a real-world project, you’ll build up a suite of dozens, hundreds, or even thousands of examples. Most test frameworks, including RSpec, are optimized for this kind of use. The default output format hides a lot of detail so that it can show your specs’ progress.

The Progress Formatter

In this section, we’re going to look at a different ways to view your specs’ output. Create a new file called spec/coffee_spec.rb with the following contents:

02-running-specs/01/spec/coffee_spec.rb

RSpec.describe 'A cup of coffee' do
  let(:coffee) { Coffee.new }

  it 'costs $1' do
    expect(coffee.price).to eq(1.00)
  end

  context 'with milk' do
    before { coffee.add :milk }