Contents

require File.dirname(__FILE__) + "/spec_helper"

describe DataMapper::Callbacks do
  
  it "should allow for a callback to be set, then called" do
    
    example = Class.new do
      include DataMapper::CallbacksHelper
      
      attr_accessor :name
      
      def initialize(name)
        @name = name
      end
      
      before_save 'name = "bob"'
      before_validation { |instance| instance.name = 'Barry White Returns!' }

    end.new('Barry White')
    
    example.class::callbacks.execute(:before_save, example)
    example.name.should == 'Barry White'
    
    example.class::callbacks.execute(:before_validation, example)
    example.name.should == 'Barry White Returns!'
  end
  
  it "should allow method delegation by passing symbols to the callback definitions" do
    
    example = Class.new do
      include DataMapper::CallbacksHelper
      
      attr_accessor :name
      
      before_save :test
      
      def test
        @name = 'Walter'
      end
    end.new
    
    example.class::callbacks.execute(:before_save, example)
    example.name.should == 'Walter'
    
  end
  
  it "should execute before_save regardless of dirty state" do
    
    Post.before_save do |post|
      post.instance_variable_set("@one", 'moo')
    end
    
    Post.before_save do |post|
      post.instance_variable_set("@two", 'cow')
    end
    
    Post.before_save :red_cow
    
    class Post
      def red_cow
        @three = "blue_cow"
      end
    end
    
    post = Post.new(:title => 'bob')
    post.save
    
    post = Post.first(:title => 'bob')
    post.instance_variable_get("@one").should be_nil
    post.instance_variable_get("@two").should be_nil
    post.instance_variable_get("@three").should be_nil

    post.save
    post.instance_variable_get("@one").should eql('moo')
    post.instance_variable_get("@two").should eql('cow')
    post.instance_variable_get("@three").should eql('blue_cow')
  end
  
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
datamapper-0.2.5	spec/callbacks_spec.rb