Rails 4.x exceptions won't be re-raised

[jarmo]

watir-rails will not re-raise exceptions thrown by Rails Rack::App when using Rails 4.x.

Code responsible for this behavior is in Watir::Rails::Middleware#call.

Exceptions won't be even raised when Rails has action_dispatch.show_exceptions set to false and Watir::Rails.ignore_exceptions? is false.

The problem seems to be in Rails and/or Rack because enabling Thin or WEBrick logging will make everything work.

The following monkey-patch is a temporary solution until newer version of gem has been released.

Add it into your spec_helper.rb or similar file:

require "watir/rails"

class Watir::Rails
  def self.run_default_server(app, port)
    require 'rack/handler/thin'
    Rack::Handler::Thin.run(app, :Port => port)
  rescue LoadError
    require 'rack/handler/webrick'
    Rack::Handler::WEBrick.run(app, :Port => port)
  end
end

[jarmo]

PS! The solution above does not seem to work with Thin < 1.6.x

[jarmo]

Is this still relevant with Rails 5.x?

[jarmo]

Or 6.x?