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-rw-r--r--activerecord/test/cases/collection_cache_key_test.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/activerecord/test/cases/collection_cache_key_test.rb b/activerecord/test/cases/collection_cache_key_test.rb
index 53058c5a4a..93e7b9cff6 100644
--- a/activerecord/test/cases/collection_cache_key_test.rb
+++ b/activerecord/test/cases/collection_cache_key_test.rb
@@ -66,5 +66,13 @@ module ActiveRecord
developers = projects(:active_record).developers
assert_match(/\Adevelopers\/query-(\h+)-(\d+)-(\d+)\Z/, developers.cache_key)
end
+
+ test "cache_key for loaded collection with zero size" do
+ Comment.delete_all
+ posts = Post.includes(:comments)
+ empty_loaded_collection = posts.first.comments
+
+ assert_match(/\Acomments\/query-(\h+)-0\Z/, empty_loaded_collection.cache_key)
+ end
end
end