JRuby 1.3.0 with AutoTest

with 3 comments

I had some trouble getting JRuby 1.3.0 and ZenTest 4.1.3 autotest to work together.  Part of the problem is that the subprocess that launches autotest ignores any attempt to turn ObjectSpace on.  The other part of the problem is how jruby parses -u after the unit_diff command.  Here’s a way to hack in fixes for each problem:

Open zentest.rb in the ZenTest gem lib directory and add the following to the top.

if RUBY_PLATFORM == 'java'
  require 'jruby'
  JRuby.objectspace = true

Open autotest.rb and in the initialize of the Autotest class change

  self.unit_diff = "unit_diff -u"


if RUBY_PLATFORM == 'java'
  self.unit_diff = "unit_diff"
  self.unit_diff = "unit_diff -u"

Run autotest.

Written by syntatic

August 13, 2009 at 11:24 am

Posted in Uncategorized

3 Responses

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  1. Any chance of getting this patched into ZenTest?



    December 18, 2009 at 12:16 pm

  2. Thanks for your post. Applied both of your suggested patches, but autotest finds no tests:

    /jruby -I.:lib:test -rubygems -e “%w[test/unit test/test_helper.rb].each { |f| require f }” | unit_diff
    Loaded suite -e

    Finished in 0.002 seconds.

    0 tests, 0 assertions, 0 failures, 0 errors

    Ideas of what could be causing this?


    February 16, 2010 at 5:26 pm

  3. If autotest finds no test just install:

    gem autotest-rails

    Hope I could help. :-)


    July 21, 2010 at 4:48 am

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