Exercise. Create class Square to pass tests or implement tests for the class.

square_spec.rb

require 'rspec'

class Square
  def initialize(x, y)
    @x = x
    @y = y
  end

  def area
    @x * @y
  end
end

describe Square do
  describe '#area' do
    subject { described_class.new(x, y).area }

    context 'when x=2 and y=3' do
      let(:x) { 2 }
      let(:y) { 3 }

      it { should eq 6 }
    end

    context 'when x=2 and y=2' do
      let(:x) { 2 }
      let(:y) { 2 }

      it { should eq 4 }
    end
  end
end