Shoulda

describe Post do
  it { should belong_to(:user) }
  it { should validate_presence_of(:title) }
end

group :test do
  gem 'rspec-rails'
  gem 'shoulda-matchers'
end

class CalculatorTest < Test::Unit::TestCase
  context "a calculator" do
    setup do
      @calculator = Calculator.new
    end

    should "add two numbers for the sum" do
      assert_equal 4, @calculator.sum(2, 2)
    end

    should "multiply two numbers for the product" do
      assert_equal 10, @calculator.product(2, 5)
    end
  end
end