7.2 Iteration B2: Unit Testing 6.3 Playtime

Augment the model with a few vailidity checks.

Various validations: required, numeric, positive, and unique

edit app/models/product.rb

class Product < ActiveRecord::Base

  validates :title, :description, :image_url, :presence => true

  validates :price, :numericality => {:greater_than_or_equal_to => 0.01}

  validates :title, :uniqueness => true

  validates :image_url, :allow_blank => true, :format => {

    :with    => %r{\.(gif|jpg|png)$}i,

    :message => 'must be a URL for GIF, JPG or PNG image.'

  }

end

Demonstrate failures.

get /products/new

post /products

• product[price] => 0.0

Demonstrate more failures.

get /products/new

post /products

• product[title] => Pragmatic Unit Testing
• product[description] => A true masterwork. Comparable to Kafka at his funniest, or Marx during his slapstick period. Move over, Tolstoy, there's a new funster in town.
• product[image_url] => /images/utj.jpg
• product[price] => wibble

edit app/models/product.rb

class Product < ActiveRecord::Base

  validates :title, :description, :image_url, :presence => true

  validates :price, :numericality => {:greater_than_or_equal_to => 0.01}

  validates :title, :uniqueness => true

  validates :image_url, :format => {

    :with    => %r{\.(gif|jpg|png)$}i,

    :message => 'must be a URL for GIF, JPG or PNG image.'

  }

end

pub depot_b

7.2 Iteration B2: Unit Testing 6.3 Playtime