1 files changed, 74 insertions, 0 deletions
diff --git a/activerecord/test/cases/associations/has_one_through_associations_test.rb b/activerecord/test/cases/associations/has_one_through_associations_test.rb
new file mode 100644
index 0000000000..3eb66bc941
--- /dev/null
+++ b/activerecord/test/cases/associations/has_one_through_associations_test.rb
@@ -0,0 +1,74 @@
+require "cases/helper"
+require 'models/club'
+require 'models/member'
+require 'models/membership'
+require 'models/sponsor'
+
+class HasOneThroughAssociationsTest < ActiveRecord::TestCase
+  fixtures :members, :clubs, :memberships, :sponsors
+  
+  def setup
+    @member = members(:groucho)
+  end
+
+  def test_has_one_through_with_has_one
+    assert_equal clubs(:boring_club), @member.club
+  end
+
+  def test_has_one_through_with_has_many
+    assert_equal clubs(:moustache_club), @member.favourite_club
+  end
+  
+  def test_creating_association_creates_through_record
+    new_member = Member.create(:name => "Chris")
+    new_member.club = Club.create(:name => "LRUG")
+    assert_not_nil new_member.current_membership
+    assert_not_nil new_member.club
+  end
+  
+  def test_replace_target_record
+    new_club = Club.create(:name => "Marx Bros")
+    @member.club = new_club
+    @member.reload
+    assert_equal new_club, @member.club
+  end
+  
+  def test_replacing_target_record_deletes_old_association
+    assert_no_difference "Membership.count" do
+      new_club = Club.create(:name => "Bananarama")
+      @member.club = new_club
+      @member.reload      
+    end
+  end
+  
+  def test_has_one_through_polymorphic
+    assert_equal clubs(:moustache_club), @member.sponsor_club
+  end
+  
+  def has_one_through_to_has_many
+    assert_equal 2, @member.fellow_members.size
+  end
+  
+  def test_has_one_through_eager_loading
+    members = Member.find(:all, :include => :club, :conditions => ["name = ?", "Groucho Marx"])
+    assert_equal 1, members.size
+    assert_not_nil assert_no_queries {members[0].club}
+  end
+  
+  def test_has_one_through_eager_loading_through_polymorphic
+    members = Member.find(:all, :include => :sponsor_club, :conditions => ["name = ?", "Groucho Marx"])
+    assert_equal 1, members.size
+    assert_not_nil assert_no_queries {members[0].sponsor_club}    
+  end
+
+  def test_has_one_through_polymorphic_with_source_type
+    assert_equal members(:groucho), clubs(:moustache_club).sponsored_member
+  end
+
+  def test_eager_has_one_through_polymorphic_with_source_type
+    clubs = Club.find(:all, :include => :sponsored_member, :conditions => ["name = ?","Moustache and Eyebrow Fancier Club"])
+    # Only the eyebrow fanciers club has a sponsored_member
+    assert_not_nil assert_no_queries {clubs[0].sponsored_member}
+  end
+
+end