Check for ruby {Class,Module}#name contract violations.

check.rb

ObjectSpace.each_object(Module).each do |object|
  method = object.method(:name)
  name =
    begin
      object.name
    rescue
      puts "#{method} from object: #{object.inspect} raised exception"
      next
    end

  case name
  when String
    result = name.split('::').reduce(Object) do |current, name|
      begin
        current.const_get(name)
      rescue NameError
        puts "#{method} from object: #{object.inspect} returned unresolvable name"
        break
      end
    end
    if result && !result.equal?(object)
      puts "#{method} from object: #{object.inspect} returned a name #{name} that does not resolve back to object returned: #{result.inspect} instead"
    end
  when NilClass
  else
    puts "#{method} from object: #{object.inspect} did not returned String or nil, was #{name.inspect}"
  end
end

results_from_a_typical_rails_project.txt

#<Method: Class(Module)#name> from object: fatal returned unresolvable name
#<Method: Module#name> from object: IO::generic_readable returned unresolvable name
#<Method: Class(Module)#name> from object: Complex::compatible returned unresolvable name
#<Method: Class(Module)#name> from object: Rational::compatible returned unresolvable name
#<Method: Module#name> from object: Math returned a name Math that does not resolve back to object returned: CMath instead
#<Method: Class(Module)#name> from object: ARGF.class returned unresolvable name
#<Method: Class(Module)#name> from object: NameError::message returned unresolvable name
#<Method: Module#name> from object: IO::generic_writable returned unresolvable name
#<Method: ActiveMerchant::Shipping::Stamps.name> from object: ActiveMerchant::Shipping::Stamps returned unresolvable name
#<Method: ActiveSupport::TimeWithZone.name> from object: ActiveSupport::TimeWithZone returned a name Time that does not resolve back to object returned: Time instead
#<Method: Sprockets::Processor.name> from object: Sprockets::Processor returned unresolvable name
#<Method: ActiveMerchant::Shipping::NewZealandPost.name> from object: ActiveMerchant::Shipping::NewZealandPost returned unresolvable name
#<Method: ActiveMerchant::Shipping::CanadaPost.name> from object: ActiveMerchant::Shipping::CanadaPost returned unresolvable name
#<Method: ActiveMerchant::Shipping::Kunaki.name> from object: ActiveMerchant::Shipping::Kunaki returned unresolvable name
#<Method: ActiveMerchant::Shipping::Shipwire.name> from object: ActiveMerchant::Shipping::Shipwire returned unresolvable name
#<Method: ActiveMerchant::Shipping::FedEx.name> from object: ActiveMerchant::Shipping::FedEx returned unresolvable name
#<Method: ActiveMerchant::Shipping::USPS.name> from object: ActiveMerchant::Shipping::USPS returned unresolvable name
#<Method: ActiveMerchant::Shipping::UPS.name> from object: ActiveMerchant::Shipping::UPS returned unresolvable name
#<Method: ActiveMerchant::Shipping::BogusCarrier.name> from object: ActiveMerchant::Shipping::BogusCarrier returned unresolvable name
#<Method: ActiveMerchant::Shipping::BenchmarkCarrier.name> from object: ActiveMerchant::Shipping::BenchmarkCarrier returned unresolvable name
#<Method: Class(ActiveRecord::Delegation::ClassSpecificRelation::ClassMethods)#name> from object: ActiveRecord::Relation::ActiveRecord_Relation_Spree_Preference returned a name ActiveRecord::Relation that does not resolve back to object returned: ActiveRecord::Relation instead
#<Method: Class(ActiveRecord::Delegation::ClassSpecificRelation::ClassMethods)#name> from object: ActiveRecord::Relation::ActiveRecord_Relation_Spree_Order returned a name ActiveRecord::Relation that does not resolve back to object returned: ActiveRecord::Relation instead
#<Method: #<class(Pry::Command "$")>(Pry::Command).name> from object: #<class(Pry::Command "$")> returned unresolvable name
#<Method: #<class(Pry::Command "show-method")>(Pry::Command).name> from object: #<class(Pry::Command "show-method")> returned unresolvable name
#<Method: #<class(Pry::Command "@")>(Pry::Command).name> from object: #<class(Pry::Command "@")> returned unresolvable name
#<Method: #<class(Pry::Command "quit-program")>(Pry::Command).name> from object: #<class(Pry::Command "quit-program")> returned unresolvable name
#<Method: #<class(Pry::Command "!!!")>(Pry::Command).name> from object: #<class(Pry::Command "!!!")> returned unresolvable name
#<Method: #<class(Pry::Command "reload-method")>(Pry::Command).name> from object: #<class(Pry::Command "reload-method")> returned unresolvable name
#<Method: #<class(Pry::Command "show-command")>(Pry::Command).name> from object: #<class(Pry::Command "show-command")> returned unresolvable name
#<Method: #<class(Pry::Command "edit-method")>(Pry::Command).name> from object: #<class(Pry::Command "edit-method")> returned unresolvable name
#<Method: #<class(Pry::Command "clipit")>(Pry::Command).name> from object: #<class(Pry::Command "clipit")> returned unresolvable name
#<Method: #<class(Pry::Command "history")>(Pry::Command).name> from object: #<class(Pry::Command "history")> returned unresolvable name
#<Method: Class(ActiveRecord::Delegation::ClassSpecificRelation::ClassMethods)#name> from object: ActiveRecord::Relation::ActiveRecord_Relation_Spree_User returned a name ActiveRecord::Relation that does not resolve back to object returned: ActiveRecord::Relation instead
#<Method: #<class(Pry::Command "test-ansi")>(Pry::Command).name> from object: #<class(Pry::Command "test-ansi")> returned unresolvable name
#<Method: #<class(Pry::Command "pessoa-poem")>(Pry::Command).name> from object: #<class(Pry::Command "pessoa-poem")> returned unresolvable name
#<Method: #<class(Pry::Command "cohen-poem")>(Pry::Command).name> from object: #<class(Pry::Command "cohen-poem")> returned unresolvable name
#<Method: #<class(Pry::Command "east-coker")>(Pry::Command).name> from object: #<class(Pry::Command "east-coker")> returned unresolvable name
#<Method: #<class(Pry::Command "get-naked")>(Pry::Command).name> from object: #<class(Pry::Command "get-naked")> returned unresolvable name
#<Method: #<class(Pry::Command /!s\/(.*?)\/(.*?)/)>(Pry::Command).name> from object: #<class(Pry::Command /!s\/(.*?)\/(.*?)/)> returned unresolvable name
#<Method: #<class(Pry::Command "nyan-cat")>(Pry::Command).name> from object: #<class(Pry::Command "nyan-cat")> returned unresolvable name
#<Method: Class(ActiveRecord::Delegation::ClassSpecificRelation::ClassMethods)#name> from object: ActiveRecord::Relation::ActiveRecord_Relation_Spree_Asset returned a name ActiveRecord::Relation that does not resolve back to object returned: ActiveRecord::Relation instead
#<Method: Class(ActiveRecord::Delegation::ClassSpecificRelation::ClassMethods)#name> from object: ActiveRecord::Relation::ActiveRecord_Relation_Spree_Role returned a name ActiveRecord::Relation that does not resolve back to object returned: ActiveRecord::Relation instead
#<Method: #<class(Pry::Command "?")>(Pry::Command).name> from object: #<class(Pry::Command "?")> returned unresolvable name
#<Method: Net::SSH::Transport::IdentityCipher.name> from object: Net::SSH::Transport::IdentityCipher returned unresolvable name
#<Method: #<class(Pry::Command "quit")>(Pry::Command).name> from object: #<class(Pry::Command "quit")> returned unresolvable name
#<Method: #<class(Pry::Command "file-mode")>(Pry::Command).name> from object: #<class(Pry::Command "file-mode")> returned unresolvable name
#<Method: #<class(Pry::Command "!!@")>(Pry::Command).name> from object: #<class(Pry::Command "!!@")> returned unresolvable name
#<Method: NewRelic::Agent::Instrumentation::ControllerInstrumentation::TransactionNamer.name> from object: NewRelic::Agent::Instrumentation::ControllerInstrumentation::TransactionNamer raised exception
#<Method: NewRelic::Agent::Samplers::CpuSampler(NewRelic::Agent::Sampler).name> from object: NewRelic::Agent::Samplers::CpuSampler did not returned String or nil, was :cpu
#<Method: NewRelic::Agent::Samplers::ObjectSampler(NewRelic::Agent::Sampler).name> from object: NewRelic::Agent::Samplers::ObjectSampler did not returned String or nil, was :object
#<Method: NewRelic::Agent::Samplers::MemorySampler(NewRelic::Agent::Sampler).name> from object: NewRelic::Agent::Samplers::MemorySampler did not returned String or nil, was :memory
#<Method: NewRelic::Agent::Samplers::DelayedJobSampler(NewRelic::Agent::Sampler).name> from object: NewRelic::Agent::Samplers::DelayedJobSampler did not returned String or nil, was :delayed_job
#<Method: NewRelic::Agent::Samplers::VMSampler(NewRelic::Agent::Sampler).name> from object: NewRelic::Agent::Samplers::VMSampler did not returned String or nil, was :vm
#<Method: #<class(Pry::Command "show-middleware")>(Pry::Command).name> from object: #<class(Pry::Command "show-middleware")> returned unresolvable name
#<Method: #<class(Pry::Command "recognize-path")>(Pry::Command).name> from object: #<class(Pry::Command "recognize-path")> returned unresolvable name
#<Method: #<class(Pry::Command "show-routes")>(Pry::Command).name> from object: #<class(Pry::Command "show-routes")> returned unresolvable name
#<Method: Class(ActiveRecord::Delegation::ClassSpecificRelation::ClassMethods)#name> from object: ActiveRecord::Relation::ActiveRecord_Relation_Spree_OptionValue returned a name ActiveRecord::Relation that does not resolve back to object returned: ActiveRecord::Relation instead