vendor/rails/activerecord/test/cases/associations/has_one_through_associations_test.rb

   1 require "cases/helper"
   2 require 'models/club'
   3 require 'models/member'
   4 require 'models/membership'
   5 require 'models/sponsor'
   6 require 'models/organization'
   7 require 'models/member_detail'
   8
   9 class HasOneThroughAssociationsTest < ActiveRecord::TestCase
  10   fixtures :members, :clubs, :memberships, :sponsors, :organizations
  11
  12   def setup
  13     @member = members(:groucho)
  14   end
  15
  16   def test_has_one_through_with_has_one
  17     assert_equal clubs(:boring_club), @member.club
  18   end
  19
  20   def test_has_one_through_with_has_many
  21     assert_equal clubs(:moustache_club), @member.favourite_club
  22   end
  23
  24   def test_creating_association_creates_through_record
  25     new_member = Member.create(:name => "Chris")
  26     new_member.club = Club.create(:name => "LRUG")
  27     assert_not_nil new_member.current_membership
  28     assert_not_nil new_member.club
  29   end
  30
  31   def test_replace_target_record
  32     new_club = Club.create(:name => "Marx Bros")
  33     @member.club = new_club
  34     @member.reload
  35     assert_equal new_club, @member.club
  36   end
  37
  38   def test_replacing_target_record_deletes_old_association
  39     assert_no_difference "Membership.count" do
  40       new_club = Club.create(:name => "Bananarama")
  41       @member.club = new_club
  42       @member.reload
  43     end
  44   end
  45
  46   def test_has_one_through_polymorphic
  47     assert_equal clubs(:moustache_club), @member.sponsor_club
  48   end
  49
  50   def has_one_through_to_has_many
  51     assert_equal 2, @member.fellow_members.size
  52   end
  53
  54   def test_has_one_through_eager_loading
  55     members = assert_queries(3) do #base table, through table, clubs table
  56       Member.find(:all, :include => :club, :conditions => ["name = ?", "Groucho Marx"])
  57     end
  58     assert_equal 1, members.size
  59     assert_not_nil assert_no_queries {members[0].club}
  60   end
  61
  62   def test_has_one_through_eager_loading_through_polymorphic
  63     members = assert_queries(3) do #base table, through table, clubs table
  64       Member.find(:all, :include => :sponsor_club, :conditions => ["name = ?", "Groucho Marx"])
  65     end
  66     assert_equal 1, members.size
  67     assert_not_nil assert_no_queries {members[0].sponsor_club}
  68   end
  69
  70   def test_has_one_through_polymorphic_with_source_type
  71     assert_equal members(:groucho), clubs(:moustache_club).sponsored_member
  72   end
  73
  74   def test_eager_has_one_through_polymorphic_with_source_type
  75     clubs = Club.find(:all, :include => :sponsored_member, :conditions => ["name = ?","Moustache and Eyebrow Fancier Club"])
  76     # Only the eyebrow fanciers club has a sponsored_member
  77     assert_not_nil assert_no_queries {clubs[0].sponsored_member}
  78   end
  79
  80   def test_has_one_through_nonpreload_eagerloading
  81     members = assert_queries(1) do
  82       Member.find(:all, :include => :club, :conditions => ["members.name = ?", "Groucho Marx"], :order => 'clubs.name') #force fallback
  83     end
  84     assert_equal 1, members.size
  85     assert_not_nil assert_no_queries {members[0].club}
  86   end
  87
  88   def test_has_one_through_nonpreload_eager_loading_through_polymorphic
  89     members = assert_queries(1) do
  90       Member.find(:all, :include => :sponsor_club, :conditions => ["members.name = ?", "Groucho Marx"], :order => 'clubs.name') #force fallback
  91     end
  92     assert_equal 1, members.size
  93     assert_not_nil assert_no_queries {members[0].sponsor_club}
  94   end
  95
  96   def test_has_one_through_nonpreload_eager_loading_through_polymorphic_with_more_than_one_through_record
  97     Sponsor.new(:sponsor_club => clubs(:crazy_club), :sponsorable => members(:groucho)).save!
  98     members = assert_queries(1) do
  99       Member.find(:all, :include => :sponsor_club, :conditions => ["members.name = ?", "Groucho Marx"], :order => 'clubs.name DESC') #force fallback
 100     end
 101     assert_equal 1, members.size
 102     assert_not_nil assert_no_queries { members[0].sponsor_club }
 103     assert_equal clubs(:crazy_club), members[0].sponsor_club
 104   end
 105
 106   def test_uninitialized_has_one_through_should_return_nil_for_unsaved_record
 107     assert_nil Member.new.club
 108   end
 109
 110   def test_assigning_association_correctly_assigns_target
 111     new_member = Member.create(:name => "Chris")
 112     new_member.club = new_club = Club.create(:name => "LRUG")
 113     assert_equal new_club, new_member.club.target
 114   end
 115
 116   def test_has_one_through_proxy_should_not_respond_to_private_methods
 117     assert_raises(NoMethodError) { clubs(:moustache_club).private_method }
 118     assert_raises(NoMethodError) { @member.club.private_method }
 119   end
 120
 121   def test_has_one_through_proxy_should_respond_to_private_methods_via_send
 122     clubs(:moustache_club).send(:private_method)
 123     @member.club.send(:private_method)
 124   end
 125
 126   def test_assigning_to_has_one_through_preserves_decorated_join_record
 127     @organization = organizations(:nsa)
 128     assert_difference 'MemberDetail.count', 1 do
 129       @member_detail = MemberDetail.new(:extra_data => 'Extra')
 130       @member.member_detail = @member_detail
 131       @member.organization = @organization
 132     end
 133     assert_equal @organization, @member.organization
 134     assert @organization.members.include?(@member)
 135     assert_equal 'Extra', @member.member_detail.extra_data
 136   end
 137
 138   def test_reassigning_has_one_through
 139     @organization = organizations(:nsa)
 140     @new_organization = organizations(:discordians)
 141
 142     assert_difference 'MemberDetail.count', 1 do
 143       @member_detail = MemberDetail.new(:extra_data => 'Extra')
 144       @member.member_detail = @member_detail
 145       @member.organization = @organization
 146     end
 147     assert_equal @organization, @member.organization
 148     assert_equal 'Extra', @member.member_detail.extra_data
 149     assert @organization.members.include?(@member)
 150     assert !@new_organization.members.include?(@member)
 151
 152     assert_no_difference 'MemberDetail.count' do
 153       @member.organization = @new_organization
 154     end
 155     assert_equal @new_organization, @member.organization
 156     assert_equal 'Extra', @member.member_detail.extra_data
 157     assert !@organization.members.include?(@member)
 158     assert @new_organization.members.include?(@member)
 159   end
 160
 161 end