# File actionpack/lib/action_controller/test_case.rb, line 118
118:       def clean_backtrace(&block)
119:         yield
120:       rescue ActiveSupport::TestCase::Assertion => error
121:         framework_path = Regexp.new(File.expand_path("#{File.dirname(__FILE__)}/assertions"))
122:         error.backtrace.reject! { |line| File.expand_path(line) =~ framework_path }
123:         raise
124:       end