in spec/support/file_system_helpers.rb [21:36]
def write_fixture_source_files
File.write("cool.rb", "class Cool; end")
FileUtils.mkdir_p("js")
File.write("js/foo.js", "function() {}")
FileUtils.mkdir_p("stylesheets")
File.write("stylesheets/main.css", ".main {}")
FileUtils.mkdir_p("vendor/jquery")
File.write("vendor/foo.css", ".main {}")
File.write("vendor/jquery/jquery.css", ".main {}")
FileUtils.mkdir_p("spec/models")
File.write("spec/spec_helper.rb", ".main {}")
File.write("spec/models/foo.rb", ".main {}")
FileUtils.mkdir_p("config")
File.write("config/foo.rb", ".main {}")
end