1 files changed, 17 insertions, 1 deletions
diff --git a/activerecord/test/cases/associations/has_many_through_associations_test.rb b/activerecord/test/cases/associations/has_many_through_associations_test.rb
index 3b3d4037b9..d5573b6d02 100644
--- a/activerecord/test/cases/associations/has_many_through_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_through_associations_test.rb
@@ -737,6 +737,18 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase
       [:added, :before, "Roger"],
       [:added, :after, "Roger"]
     ], log.last(4)
+
+    post.people_with_callbacks.build { |person| person.first_name = "Ted" }
+    assert_equal [
+      [:added, :before, "Ted"],
+      [:added, :after, "Ted"]
+    ], log.last(2)
+
+    post.people_with_callbacks.create { |person| person.first_name = "Sam" }
+    assert_equal [
+      [:added, :before, "Sam"],
+      [:added, :after, "Sam"]
+    ], log.last(2)
   end
 
   def test_dynamic_find_should_respect_association_include
@@ -866,7 +878,7 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase
     author   = authors(:mary)
     category = author.named_categories.create(name: "Primary")
     author.named_categories.delete(category)
-    assert !Categorization.exists?(author_id: author.id, named_category_name: category.name)
+    assert_not Categorization.exists?(author_id: author.id, named_category_name: category.name)
     assert_empty author.named_categories.reload
   end
 
@@ -1277,6 +1289,10 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase
     assert_equal authors(:david), Author.joins(:comments_for_first_author).take
   end
 
+  def test_has_many_through_with_left_joined_same_table_with_through_table
+    assert_equal [comments(:eager_other_comment1)], authors(:mary).comments.left_joins(:post)
+  end
+
   def test_has_many_through_with_unscope_should_affect_to_through_scope
     assert_equal [comments(:eager_other_comment1)], authors(:mary).unordered_comments
   end