1 files changed, 137 insertions, 0 deletions
diff --git a/activerecord/test/cases/associations/identity_map_test.rb b/activerecord/test/cases/associations/identity_map_test.rb
new file mode 100644
index 0000000000..9b8635774c
--- /dev/null
+++ b/activerecord/test/cases/associations/identity_map_test.rb
@@ -0,0 +1,137 @@
+require "cases/helper"
+require 'models/author'
+require 'models/post'
+
+if ActiveRecord::IdentityMap.enabled?
+class InverseHasManyIdentityMapTest < ActiveRecord::TestCase
+  fixtures :authors, :posts
+
+  def test_parent_instance_should_be_shared_with_every_child_on_find
+    m = Author.first
+    is = m.posts
+    is.each do |i|
+      assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+      m.name = 'Bongo'
+      assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+      i.author.name = 'Mungo'
+      assert_equal m.name, i.author.name, "Name of man should be the same after changes to child-owned instance"
+    end
+  end
+
+  def test_parent_instance_should_be_shared_with_eager_loaded_children
+    m = Author.find(:first, :include => :posts)
+    is = m.posts
+    is.each do |i|
+      assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+      m.name = 'Bongo'
+      assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+      i.author.name = 'Mungo'
+      assert_equal m.name, i.author.name, "Name of man should be the same after changes to child-owned instance"
+    end
+
+    m = Author.find(:first, :include => :posts, :order => 'posts.id')
+    is = m.posts
+    is.each do |i|
+      assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+      m.name = 'Bongo'
+      assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+      i.author.name = 'Mungo'
+      assert_equal m.name, i.author.name, "Name of man should be the same after changes to child-owned instance"
+    end
+  end
+
+  def test_parent_instance_should_be_shared_with_newly_built_child
+    m = Author.first
+    i = m.posts.build(:title => 'Industrial Revolution Re-enactment', :body => 'Lorem ipsum')
+    assert_not_nil i.author
+    assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+    m.name = 'Bongo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+    i.author.name = 'Mungo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to just-built-child-owned instance"
+  end
+
+  def test_parent_instance_should_be_shared_with_newly_block_style_built_child
+    m = Author.first
+    i = m.posts.build {|ii| ii.title = 'Industrial Revolution Re-enactment'; ii.body = 'Lorem ipsum'}
+    assert_not_nil i.title, "Child attributes supplied to build via blocks should be populated"
+    assert_not_nil i.author
+    assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+    m.name = 'Bongo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+    i.author.name = 'Mungo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to just-built-child-owned instance"
+  end
+
+  def test_parent_instance_should_be_shared_with_newly_created_child
+    m = Author.first
+    i = m.posts.create(:title => 'Industrial Revolution Re-enactment', :body => 'Lorem ipsum')
+    assert_not_nil i.author
+    assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+    m.name = 'Bongo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+    i.author.name = 'Mungo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to newly-created-child-owned instance"
+  end
+
+  def test_parent_instance_should_be_shared_with_newly_created_via_bang_method_child
+    m = Author.first
+    i = m.posts.create!(:title => 'Industrial Revolution Re-enactment', :body => 'Lorem ipsum')
+    assert_not_nil i.author
+    assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+    m.name = 'Bongo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+    i.author.name = 'Mungo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to newly-created-child-owned instance"
+  end
+
+  def test_parent_instance_should_be_shared_with_newly_block_style_created_child
+    m = Author.first
+    i = m.posts.create {|ii| ii.title = 'Industrial Revolution Re-enactment'; ii.body = 'Lorem ipsum'}
+    assert_not_nil i.title, "Child attributes supplied to create via blocks should be populated"
+    assert_not_nil i.author
+    assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+    m.name = 'Bongo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+    i.author.name = 'Mungo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to newly-created-child-owned instance"
+  end
+
+  def test_parent_instance_should_be_shared_with_poked_in_child
+    m = Author.first
+    i = Post.create(:title => 'Industrial Revolution Re-enactment', :body => 'Lorem ipsum')
+    m.posts << i
+    assert_not_nil i.author
+    assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+    m.name = 'Bongo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+    i.author.name = 'Mungo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to newly-created-child-owned instance"
+  end
+
+  def test_parent_instance_should_be_shared_with_replaced_via_accessor_children
+    m = Author.first
+    i = Post.new(:title => 'Industrial Revolution Re-enactment', :body => 'Lorem ipsum')
+    m.posts = [i]
+    assert_same m, i.author
+    assert_not_nil i.author
+    assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+    m.name = 'Bongo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+    i.author.name = 'Mungo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to replaced-child-owned instance"
+  end
+
+  def test_parent_instance_should_be_shared_with_replaced_via_method_children
+    m = Author.first
+    i = Post.new(:title => 'Industrial Revolution Re-enactment', :body => 'Lorem ipsum')
+    m.posts = [i]
+    assert_not_nil i.author
+    assert_equal m.name, i.author.name, "Name of man should be the same before changes to parent instance"
+    m.name = 'Bongo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to parent instance"
+    i.author.name = 'Mungo'
+    assert_equal m.name, i.author.name, "Name of man should be the same after changes to replaced-child-owned instance"
+  end
+end
+end