Add test to AR's counter_cache_test.rb

According to
https://github.com/rails/rails/blob/b601399b72ab56cc01368f02615af99f45d1
4f02/activerecord/lib/active_record/counter_cache.rb#L14, u can pass
more then one association to the `reset_counters` method.

1 files changed, 12 insertions, 0 deletions

diff --git a/activerecord/test/cases/counter_cache_test.rb b/activerecord/test/cases/counter_cache_test.rb
index ac093251a5..61f9d4cdae 100644
--- a/activerecord/test/cases/counter_cache_test.rb
+++ b/activerecord/test/cases/counter_cache_test.rb
@@ -51,6 +51,18 @@ class CounterCacheTest < ActiveRecord::TestCase
     end
   end
 
+  test 'reset multiple association counters' do
+    Topic.increment_counter(:replies_count, @topic.id)
+    assert_difference '@topic.reload.replies_count', -1 do
+      Topic.reset_counters(@topic.id, :replies, :unique_replies)
+    end
+
+    Topic.increment_counter(:unique_replies_count, @topic.id)
+    assert_difference '@topic.reload.unique_replies_count', -1 do
+      Topic.reset_counters(@topic.id, :replies, :unique_replies)
+    end
+  end
+
   test "reset counters with string argument" do
     Topic.increment_counter('replies_count', @topic.id)