1 files changed, 12 insertions, 0 deletions
diff --git a/activerecord/test/cases/associations_test.rb b/activerecord/test/cases/associations_test.rb
index 4ab690bfc6..2eb31326a5 100644
--- a/activerecord/test/cases/associations_test.rb
+++ b/activerecord/test/cases/associations_test.rb
@@ -220,6 +220,18 @@ class AssociationProxyTest < ActiveRecord::TestCase
     assert_equal david.projects, david.projects.scope
   end
 
+  test "proxy object is cached" do
+    david = developers(:david)
+    assert_same david.projects, david.projects
+  end
+
+  test "proxy object can be stubbed" do
+    david = developers(:david)
+    david.projects.define_singleton_method(:extra_method) { 42 }
+
+    assert_equal 42, david.projects.extra_method
+  end
+
   test "inverses get set of subsets of the association" do
     man = Man.create
     man.interests.create