Method detection code

method_call_detection.rb

# Raises an error when method is called, unless it was called by known caller.
#
# In your class:
#
# include MethodCallDetection
# detect_method_calls_of :method_to_detect do |trace|
#   next true if trace[0].match?('path/of/direct_call.rb:123')
#   next true if trace.any? { _1.match?('path/of/call_somewhere.rb') }
# end
module MethodCallDetection
  extend ActiveSupport::Concern

  class_methods do
    def detect_method_calls_of(name)
      # Make sure not to run on production here

      define_method(name) do |*args|
        trace = Kernel.caller
        unless yield(trace)
          Kernel.puts trace
          Kernel.raise "Unknown call of #{self.class}##{name}"
        end

        super(*args)
      end
    end
  end
end