shoulda_tutorial.text

  Shoulda allows you to create unit tests and matchers in a light-weight, readable format. 

Matchers

Matchers for Active Record test associations.

Active Record matchers

describe Post do 
  it {should belong_to(:user)}
  it {should have_many(:tags).through(:taggings)}
end

Matchers for Active Model tests valiations.
Active Model matchers

describe Post do 
  it {should validate_uniqueness of(:title)}
end

describe User do
  it {should_not allow_value("blah").for(:email)}
end


Unit Testing

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