Enable warning on shape too complex

Author: HParker

test/test_helper.rb

@@ -5,6 +5,8 @@
 require "simplecov-console"
 require "rails/version"
 
+Warning[:performance] = true
+
 if ENV["MEASURE_COVERAGE"]
   SimpleCov.start do
     command_name "minitest-rails#{Rails::VERSION::STRING}-ruby#{RUBY_VERSION}"