add test to check that loaded and non laoded are the same

Test checks that SQL is the same for a loaded vs not loaded
association (category.categorizations, category.categorization.delete_all
vs category.cartegroization.delete_al). This was fixed for delete_all
dependency but was not fixed for no (:nullify, or nil) dependency).

1 files changed, 13 insertions, 0 deletions

diff --git a/activerecord/test/cases/associations/has_many_associations_test.rb b/activerecord/test/cases/associations/has_many_associations_test.rb
index c79c0c87c5..2f5c9d6e1b 100644
--- a/activerecord/test/cases/associations/has_many_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_associations_test.rb
@@ -131,6 +131,19 @@ class HasManyAssociationsTest < ActiveRecord::TestCase
     assert_equal(expected_sql, loaded_sql)
   end
 
+  def test_delete_all_on_association_with_nil_dependency_is_the_same_as_not_loaded
+    author = authors :david
+    author.posts.create!(:title => "test", :body => "body")
+    author.reload
+    expected_sql = capture_sql { author.posts.delete_all }
+
+    author.posts.create!(:title => "test", :body => "body")
+    author.reload
+    author.posts.to_a
+    loaded_sql = capture_sql { author.posts.delete_all }
+    assert_equal(expected_sql, loaded_sql)
+  end
+
   def test_building_the_associated_object_with_implicit_sti_base_class
     firm = DependentFirm.new
     company = firm.companies.build