test, regression test for has_many with instance dependent scope.

activerecord/test/cases/associations/has_many_associations_test.rb

@@ -1894,4 +1894,14 @@ def test_collection_association_with_private_kernel_method
     assert_not pirate.valid?(:conference)
     assert_equal "can't be blank", ship.errors[:name].first
   end
+
+  test 'association with instance dependent scope' do
+    bob = authors(:bob)
+    Post.create!(title: "signed post by bob", body: "stuff", author: authors(:bob))
+    Post.create!(title: "anonymous post", body: "more stuff", author: authors(:bob))
+    assert_equal ["misc post by bob", "other post by bob",
+                  "signed post by bob"], bob.posts_with_signature.map(&:title).sort
+
+    assert_equal [], authors(:david).posts_with_signature.map(&:title)
+  end
 end

activerecord/test/models/author.rb

@@ -140,6 +140,8 @@ def ratings
   has_many :posts_with_default_include, :class_name => 'PostWithDefaultInclude'
   has_many :comments_on_posts_with_default_include, :through => :posts_with_default_include, :source => :comments
 
+  has_many :posts_with_signature, -> (record) { where("posts.title LIKE ?", "%by #{record.name.downcase}%") }, class_name: "Post"
+
   scope :relation_include_posts, -> { includes(:posts) }
   scope :relation_include_tags,  -> { includes(:tags) }