smelling rspec

it_smells_like_spec.rb

require 'rspec'

# This smells
[[ 1, 2,  3],
 [ 4, 8, 12],
 [-2, 3,  1],
 [ 0, 0,  0]].each do |a, b, c|
  describe "#{a} + #{b}" do
    subject { a + b }
    it { should == c }
  end
end

# I prefer this

shared_examples_for "plus" do |a, b, c|
  describe "#{a} + #{b}" do
    subject { a + b }
    it { should == c }
  end
end

describe do
  it_behaves_like "plus",  1, 2,  3
  it_behaves_like "plus",  4, 8, 12
  it_behaves_like "plus", -2, 3,  1
  it_behaves_like "plus",  0, 0,  0
end