I am working with Rails using TorqueBox and JRuby. I recently upgraded to TorqueBox 3.1.2 which included a JRuby upgrade from 1.7.13 to 1.7.19. I noticed a breaking change on Windows machines where the Rails.root will return a Pathname object with backslashes instead of forward slashes. This causes issues in situations where you need to match file paths. For example, this broke our AngularJS Jasmine tests because the jasmine-rails gem was not able to find the application.js file using the Dir.glob method.

I originally thought the issue was with TorqueBox, but upon comparing JRuby version while keeping TorqueBox consistent you can see that JRuby is the cause of the issue. Notice the file paths returned upon running Rails.root in a rails console.

Working Versions

Torquebox 3.1.2 with JRuby 1.7.13 (2.0.0-p195) (JRUBY_OPTS = --2.0)

About your application's environment
Ruby version              2.0.0-p195 (java)
RubyGems version          2.1.9
Rails version             4.1.1

Rails.root = <Pathname:C:/Users/jacollins/RubymineProjects/ViewPoint>

Torquebox 3.1.2 JRuby 1.7.13 (1.9.3-p392)

About your application's environment
Ruby version              1.9.3-p392 (java)
RubyGems version          2.1.9
Rails version             4.1.1

Rails.root = <Pathname:C:/Users/jacollins/RubymineProjects/ViewPoint>

Broken Versions

Torquebox 3.1.2 JRuby 1.7.19 (2.0.0p598) (JRUBY_OPTS = --2.0)

About your application's environment
Ruby version              2.0.0-p598 (java)
RubyGems version          2.1.9
Rails version             4.1.1

Rails.root = <Pathname:C:\Users\jacollins\RubymineProjects\ViewPoint>

Torquebox 3.1.2 JRuby 1.7.19 (1.9.3p551)

About your application's environment
Ruby version              1.9.3-p551 (java)
RubyGems version          2.1.9
Rails version             4.1.1

Rails.root = <Pathname:C:\Users\jacollins\RubymineProjects\ViewPoint>

Let me know if you need any other information.