How do I use parallel testing in Ruby 1.9.3?

ruby-talk
1

(Cross-posting from


)

Given the following file

# Modified from


# replication.rb
require 'test/unit'
class TestTest < Test::Unit::TestCase
  def test_one
    assert true
  end

  def test_two
    assert true
  end
end

and Ruby 1.9.3

$ /usr/bin/ruby1.9.1 --version
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux]

$ /usr/bin/ruby1.9.1 replication.rb --help
Usage: replication [options]
minitest options:
    -h, --help Display this help.
    -s, --seed SEED Sets random seed
    -v, --verbose Verbose. Show progress processing files.
    -n, --name PATTERN Filter test names on pattern.
        --jobs-status [TYPE] Show status of jobs every file;
Disabled when --jobs isn't specified.
    -j, --jobs N Allow run tests with N jobs at once
        --no-retry Don't retry running testcase when
--jobs specified
        --ruby VAL Path to ruby; It'll have used at -j option
    -q, --hide-skip Hide skipped tests
    -b, --basedir=DIR Base directory of test suites.
    -x, --exclude PATTERN Exclude test files on pattern.
    -Idirectory Add library load path
        --[no-]gc-stress Set GC.stress as true

I'm able to run tests non-parallelized:

$ /usr/bin/ruby1.9.1 replication.rb
Run options:

# Running tests:

..

Finished tests in 0.000458s, 4368.4051 tests/s, 4368.4051 assertions/s.

2 tests, 2 assertions, 0 failures, 0 errors, 0 skips

But not in parallel:

$ /usr/bin/ruby1.9.1 replication.rb --jobs=2 --ruby /usr/bin/ruby1.9.1
Run options: --jobs=2 --ruby /usr/bin/ruby1.9.1

# Running tests:

Retrying...

Finished tests in 0.037315s, 0.0000 tests/s, 0.0000 assertions/s.

0 tests, 0 assertions, 0 failures, 0 errors, 0 skips

I've also found this to be the case on both Ubuntu (12.04) and OS X
(snow leopard).

Do I need to be using rake in order to do parallel testing? Or have I
done something else wrong?

Thanks,

Andrew Grimm

2

--no-retry throws errors as well:

» replicate.rb --jobs=2 --no-retry
Run options: --jobs=2 --no-retry

# Running tests:

/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:522:in
`+': nil can't be coerced into Fixnum (TypeError)
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:522:in
`_run_parallel'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:561:in
`_run_suites'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/minitest/unit.rb:746:in
`_run_anything'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/minitest/unit.rb:909:in
`run_tests'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/minitest/unit.rb:896:in
`block in _run'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/minitest/unit.rb:895:in
`each'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/minitest/unit.rb:895:in
`_run'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/minitest/unit.rb:884:in
`run'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:21:in
`run'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:326:in
`block (2 levels) in autorun'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:27:in
`run_once'
  from
/home/karatedog/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:325:in
`block in autorun'

···

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