How to get stack trace from a Test::Unit::TestCase
Looking through the code of Test::Unit in Ruby 1.8, it seems all the errors go through the Test::Unit::Error object which filters the backtrace in its #long_display method. There is no configuration and all runners will use the same filtered trace.
Brute force monkey patch to get the whole trace: (I put this in my single test case file; perhaps you could put it in a test helper)
require 'test/unit/util/backtracefilter'module Test::Unit::Util::BacktraceFilter def filter_backtrace(backtrace, prefix=nil) backtrace endend
And monkey patch for Ruby 1.9 (which uses minitest)
def MiniTest.filter_backtrace(bt) btend