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@@ -447,11 +447,14 @@ module ThoughtBot # :nodoc:
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         # associated table has the required columns.  Works with polymorphic
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         # associations.
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         #
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+        # Options:
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+        # * <tt>:dependent</tt> - tests that the association makes use of the dependent option.
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+        #
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         # Example:
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         #   should_have_one :god # unless hindu
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         #
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         def should_have_one(*associations)
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-          get_options!(associations)
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+          dependent = get_options!(associations, :dependent)
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           klass = model_class
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           associations.each do |association|
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             should "have one #{association}" do
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@@ -473,6 +476,12 @@ module ThoughtBot # :nodoc:
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               end
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               assert associated_klass.column_names.include?(fk.to_s),
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                      "#{associated_klass.name} does not have a #{fk} foreign key."
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+                     
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+              if dependent
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+                assert_equal dependent.to_s,
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+                             reflection.options[:dependent].to_s,
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+                             "#{association} should have #{dependent} dependency"
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+              end
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             end
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           end
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         end

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@@ -5,7 +5,7 @@ class User < ActiveRecord::Base
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   has_many :friendships
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   has_many :friends, :through => :friendships
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-  has_one :address, :as => :addressable
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+  has_one :address, :as => :addressable, :dependent => :destroy
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   named_scope :old,      :conditions => "age > 50"
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   named_scope :eighteen, :conditions => { :age => 18 }

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@@ -9,7 +9,7 @@ class UserTest < Test::Unit::TestCase
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   should_have_many :friendships
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   should_have_many :friends
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-  should_have_one :address
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+  should_have_one :address, :dependent => :destroy
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   should_have_indices :email, :name, [:email, :name]
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   should_have_index :age