Remember to reload your associations in your tests

Save time by reloading your associations when using RSpec.

    1 # your_object.rb
    2 class YourObject < ActiveRecord::Base
    3   def your_method
    4     self.your_association << TestObject.new
    5   end
    6 end
    7 
    8 # your_object_spec.rb
    9 it "should test your_method" do
   10   lambda { your_object.your_method }.should change(your_object.your_association, :size)   # => no change, test fails....
   11 end
   12 

Just put a reload after your association call:

    1 # your_object_spec.rb
    2 it "should test your_method" do
    3   lambda { your_object.your_method }.should change(your_object.your_association.reload, :size)   # => association reloads and the test succeeds
    4 end