should test your models like a pro

shoulda_matchers.rb

should validate_presence_of(:name)
should ensure_length_of(:name).is_at_most(15)
should ensure_length_of(:name).is_at_least(5)
should ensure_length_of(:name).is_at_least(5).is_at_most(15)
should have_many(:tweets)
should validate_uniqueness_of(:name)
should validate_numericality_of(:age)
should_not allow_value("wutlol").for(:email)
should allow_value("a@b.com").for(:email)
should ensure_inclusion_of(:age).in_range(1..100)
should_not allow_mass_assignment_of(:password)
should belong_to(:me)