Adds a test that breaks IM when using #select

1 files changed, 6 insertions, 12 deletions

diff --git a/activerecord/test/cases/identity_map_test.rb b/activerecord/test/cases/identity_map_test.rb
index 24132c7617..2a490126e2 100644
--- a/activerecord/test/cases/identity_map_test.rb
+++ b/activerecord/test/cases/identity_map_test.rb
@@ -404,18 +404,12 @@ class IdentityMapTest < ActiveRecord::TestCase
     assert comment.save
   end
 
-  def test_find_using_select_and_identity_map
-    author_id, author = Author.select('id').order(:id).first, Author.order(:id).first
-
-    assert_equal author_id, author
-    assert_same author_id, author
-    assert_not_nil author.name
-
-    post, post_id = Post.order(:id).first, Post.select('id').order(:id).first
-
-    assert_equal post_id, post
-    assert_same post_id, post
-    assert_not_nil post.title
+  def test_do_not_add_to_identity_map_if_record_do_not_contain_all_columns
+    post = Post.select(:id).first
+    comment = post.comments[0]
+    assert_nothing_raised do
+      assert_not_nil comment.post.title
+    end
   end
 
 # Currently AR is not allowing changing primary key (see Persistence#update)