n_plus_one_control (rubygems):      RSpec and Minitest matchers to prevent N+1 queries problem.      Evaluates code under consideration several times with different scale factors     to make sure that the number of DB queries behaves as expected (i.e. O(1) instead of O(N)).   
Keywords: database-testing|hacktoberfest|minitest|performance-testing|rspec|ruby|testing