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diff --git a/jni/ruby/test/lib/minitest/README.txt b/jni/ruby/test/lib/minitest/README.txt
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+= minitest/{unit,spec,mock,benchmark}
+
+home :: https://github.com/seattlerb/minitest
+rdoc :: http://docs.seattlerb.org/minitest
+vim  :: https://github.com/sunaku/vim-ruby-minitest
+
+== DESCRIPTION:
+
+minitest provides a complete suite of testing facilities supporting
+TDD, BDD, mocking, and benchmarking.
+
+    "I had a class with Jim Weirich on testing last week and we were
+     allowed to choose our testing frameworks. Kirk Haines and I were
+     paired up and we cracked open the code for a few test
+     frameworks...
+
+     I MUST say that minitest is *very* readable / understandable
+     compared to the 'other two' options we looked at. Nicely done and
+     thank you for helping us keep our mental sanity."
+
+    -- Wayne E. Seguin
+
+minitest/unit is a small and incredibly fast unit testing framework.
+It provides a rich set of assertions to make your tests clean and
+readable.
+
+minitest/spec is a functionally complete spec engine. It hooks onto
+minitest/unit and seamlessly bridges test assertions over to spec
+expectations.
+
+minitest/benchmark is an awesome way to assert the performance of your
+algorithms in a repeatable manner. Now you can assert that your newb
+co-worker doesn't replace your linear algorithm with an exponential
+one!
+
+minitest/mock by Steven Baker, is a beautifully tiny mock (and stub)
+object framework.
+
+minitest/pride shows pride in testing and adds coloring to your test
+output. I guess it is an example of how to write IO pipes too. :P
+
+minitest/unit is meant to have a clean implementation for language
+implementors that need a minimal set of methods to bootstrap a working
+test suite. For example, there is no magic involved for test-case
+discovery.
+
+    "Again, I can't praise enough the idea of a testing/specing
+     framework that I can actually read in full in one sitting!"
+
+    -- Piotr Szotkowski
+
+Comparing to rspec:
+
+    rspec is a testing DSL. minitest is ruby.
+
+    -- Adam Hawkins, "Bow Before MiniTest"
+
+minitest doesn't reinvent anything that ruby already provides, like:
+classes, modules, inheritance, methods. This means you only have to
+learn ruby to use minitest and all of your regular OO practices like
+extract-method refactorings still apply.
+
+== FEATURES/PROBLEMS:
+
+* minitest/autorun - the easy and explicit way to run all your tests.
+* minitest/unit - a very fast, simple, and clean test system.
+* minitest/spec - a very fast, simple, and clean spec system.
+* minitest/mock - a simple and clean mock/stub system.
+* minitest/benchmark - an awesome way to assert your algorithm's performance.
+* minitest/pride - show your pride in testing!
+* Incredibly small and fast runner, but no bells and whistles.
+
+== RATIONALE:
+
+See design_rationale.rb to see how specs and tests work in minitest.
+
+== SYNOPSIS:
+
+Given that you'd like to test the following class:
+
+  class Meme
+    def i_can_has_cheezburger?
+      "OHAI!"
+    end
+
+    def will_it_blend?
+      "YES!"
+    end
+  end
+
+=== Unit tests
+
+  require 'minitest/autorun'
+
+  class TestMeme < MiniTest::Unit::TestCase
+    def setup
+      @meme = Meme.new
+    end
+
+    def test_that_kitty_can_eat
+      assert_equal "OHAI!", @meme.i_can_has_cheezburger?
+    end
+
+    def test_that_it_will_not_blend
+      refute_match /^no/i, @meme.will_it_blend?
+    end
+
+    def test_that_will_be_skipped
+      skip "test this later"
+    end
+  end
+
+=== Specs
+
+  require 'minitest/autorun'
+
+  describe Meme do
+    before do
+      @meme = Meme.new
+    end
+
+    describe "when asked about cheeseburgers" do
+      it "must respond positively" do
+        @meme.i_can_has_cheezburger?.must_equal "OHAI!"
+      end
+    end
+
+    describe "when asked about blending possibilities" do
+      it "won't say no" do
+        @meme.will_it_blend?.wont_match /^no/i
+      end
+    end
+  end
+
+For matchers support check out:
+
+https://github.com/zenspider/minitest-matchers
+
+=== Benchmarks
+
+Add benchmarks to your regular unit tests. If the unit tests fail, the
+benchmarks won't run.
+
+  # optionally run benchmarks, good for CI-only work!
+  require 'minitest/benchmark' if ENV["BENCH"]
+
+  class TestMeme < MiniTest::Unit::TestCase
+    # Override self.bench_range or default range is [1, 10, 100, 1_000, 10_000]
+    def bench_my_algorithm
+      assert_performance_linear 0.9999 do |n| # n is a range value
+        @obj.my_algorithm(n)
+      end
+    end
+  end
+
+Or add them to your specs. If you make benchmarks optional, you'll
+need to wrap your benchmarks in a conditional since the methods won't
+be defined.
+
+  describe Meme do
+    if ENV["BENCH"] then
+      bench_performance_linear "my_algorithm", 0.9999 do |n|
+        100.times do
+          @obj.my_algorithm(n)
+        end
+      end
+    end
+  end
+
+outputs something like:
+
+  # Running benchmarks:
+
+  TestBlah	100	1000	10000
+  bench_my_algorithm	 0.006167	 0.079279	 0.786993
+  bench_other_algorithm	 0.061679	 0.792797	 7.869932
+
+Output is tab-delimited to make it easy to paste into a spreadsheet.
+
+=== Mocks
+
+  class MemeAsker
+    def initialize(meme)
+      @meme = meme
+    end
+
+    def ask(question)
+      method = question.tr(" ","_") + "?"
+      @meme.__send__(method)
+    end
+  end
+
+  require 'minitest/autorun'
+
+  describe MemeAsker do
+    before do
+      @meme = MiniTest::Mock.new
+      @meme_asker = MemeAsker.new @meme
+    end
+
+    describe "#ask" do
+      describe "when passed an unpunctuated question" do
+        it "should invoke the appropriate predicate method on the meme" do
+          @meme.expect :will_it_blend?, :return_value
+          @meme_asker.ask "will it blend"
+          @meme.verify
+        end
+      end
+    end
+  end
+
+=== Stubs
+
+  def test_stale_eh
+    obj_under_test = Something.new
+
+    refute obj_under_test.stale?
+
+    Time.stub :now, Time.at(0) do   # stub goes away once the block is done
+      assert obj_under_test.stale?
+    end
+  end
+
+A note on stubbing: In order to stub a method, the method must
+actually exist prior to stubbing. Use a singleton method to create a
+new non-existing method:
+
+  def obj_under_test.fake_method
+    ...
+  end
+
+=== Customizable Test Runner Types:
+
+MiniTest::Unit.runner=(runner) provides an easy way of creating custom
+test runners for specialized needs. Justin Weiss provides the
+following real-world example to create an alternative to regular
+fixture loading:
+
+  class MiniTestWithHooks::Unit < MiniTest::Unit
+    def before_suites
+    end
+
+    def after_suites
+    end
+
+    def _run_suites(suites, type)
+      begin
+        before_suites
+        super(suites, type)
+      ensure
+        after_suites
+      end
+    end
+
+    def _run_suite(suite, type)
+      begin
+        suite.before_suite
+        super(suite, type)
+      ensure
+        suite.after_suite
+      end
+    end
+  end
+
+  module MiniTestWithTransactions
+    class Unit < MiniTestWithHooks::Unit
+      include TestSetupHelper
+
+      def before_suites
+        super
+        setup_nested_transactions
+        # load any data we want available for all tests
+      end
+
+      def after_suites
+        teardown_nested_transactions
+        super
+      end
+    end
+  end
+
+  MiniTest::Unit.runner = MiniTestWithTransactions::Unit.new
+
+== FAQ
+
+=== How to test SimpleDelegates?
+
+The following implementation and test:
+
+    class Worker < SimpleDelegator
+      def work
+      end
+    end
+
+    describe Worker do
+      before do
+        @worker = Worker.new(Object.new)
+      end
+
+      it "must respond to work" do
+        @worker.must_respond_to :work
+      end
+    end
+
+outputs a failure:
+
+      1) Failure:
+    Worker#test_0001_must respond to work [bug11.rb:16]:
+    Expected #<Object:0x007f9e7184f0a0> (Object) to respond to #work.
+
+Worker is a SimpleDelegate which in 1.9+ is a subclass of BasicObject.
+Expectations are put on Object (one level down) so the Worker
+(SimpleDelegate) hits `method_missing` and delegates down to the
+`Object.new` instance. That object doesn't respond to work so the test
+fails.
+
+You can bypass `SimpleDelegate#method_missing` by extending the worker
+with `MiniTest::Expectations`. You can either do that in your setup at
+the instance level, like:
+
+    before do
+      @worker = Worker.new(Object.new)
+      @worker.extend MiniTest::Expectations
+    end
+
+or you can extend the Worker class (within the test file!), like:
+
+    class Worker
+      include ::MiniTest::Expectations
+    end
+
+== Known Extensions:
+
+capybara_minitest_spec      :: Bridge between Capybara RSpec matchers and MiniTest::Spec expectations (e.g. page.must_have_content('Title')).
+minispec-metadata           :: Metadata for describe/it blocks
+                               (e.g. `it 'requires JS driver', js: true do`)
+minitest-ansi               :: Colorize minitest output with ANSI colors.
+minitest-around             :: Around block for minitest. An alternative to setup/teardown dance.
+minitest-capistrano         :: Assertions and expectations for testing Capistrano recipes
+minitest-capybara           :: Capybara matchers support for minitest unit and spec
+minitest-chef-handler       :: Run Minitest suites as Chef report handlers
+minitest-ci                 :: CI reporter plugin for MiniTest.
+minitest-colorize           :: Colorize MiniTest output and show failing tests instantly.
+minitest-context            :: Defines contexts for code reuse in MiniTest
+                               specs that share common expectations.
+minitest-debugger           :: Wraps assert so failed assertions drop into
+                               the ruby debugger.
+minitest-display            :: Patches MiniTest to allow for an easily configurable output.
+minitest-emoji              :: Print out emoji for your test passes, fails, and skips.
+minitest-english            :: Semantically symmetric aliases for assertions and expectations.
+minitest-excludes           :: Clean API for excluding certain tests you
+                               don't want to run under certain conditions.
+minitest-firemock           :: Makes your MiniTest mocks more resilient.
+minitest-great_expectations :: Generally useful additions to minitest's assertions and expectations
+minitest-growl              :: Test notifier for minitest via growl.
+minitest-implicit-subject   :: Implicit declaration of the test subject.
+minitest-instrument         :: Instrument ActiveSupport::Notifications when
+                               test method is executed
+minitest-instrument-db      :: Store information about speed of test
+                               execution provided by minitest-instrument in database
+minitest-libnotify          :: Test notifier for minitest via libnotify.
+minitest-macruby            :: Provides extensions to minitest for macruby UI testing.
+minitest-matchers           :: Adds support for RSpec-style matchers to minitest.
+minitest-metadata           :: Annotate tests with metadata (key-value).
+minitest-mongoid            :: Mongoid assertion matchers for MiniTest
+minitest-must_not           :: Provides must_not as an alias for wont in MiniTest
+minitest-nc                 :: Test notifier for minitest via Mountain Lion's Notification Center
+minitest-predicates         :: Adds support for .predicate? methods
+minitest-rails              :: MiniTest integration for Rails 3.x
+minitest-rails-capybara     :: Capybara integration for MiniTest::Rails
+minitest-reporters          :: Create customizable MiniTest output formats
+minitest-should_syntax      :: RSpec-style +x.should == y+ assertions for MiniTest
+minitest-shouldify          :: Adding all manner of shoulds to MiniTest (bad idea)
+minitest-spec-context       :: Provides rspec-ish context method to MiniTest::Spec
+minitest-spec-magic         :: Minitest::Spec extensions for Rails and beyond
+minitest-spec-rails         :: Drop in MiniTest::Spec superclass for ActiveSupport::TestCase.
+minitest-stub-const         :: Stub constants for the duration of a block
+minitest-tags               :: add tags for minitest
+minitest-wscolor            :: Yet another test colorizer.
+minitest_owrapper           :: Get tests results as a TestResult object.
+minitest_should             :: Shoulda style syntax for minitest test::unit.
+minitest_tu_shim            :: minitest_tu_shim bridges between test/unit and minitest.
+mongoid-minitest            :: MiniTest matchers for Mongoid.
+pry-rescue                  :: A pry plugin w/ minitest support. See pry-rescue/minitest.rb.
+
+== Unknown Extensions:
+
+Authors... Please send me a pull request with a description of your minitest extension.
+
+* assay-minitest
+* detroit-minitest
+* em-minitest-spec
+* flexmock-minitest
+* guard-minitest
+* guard-minitest-decisiv
+* minitest-activemodel
+* minitest-ar-assertions
+* minitest-capybara-unit
+* minitest-colorer
+* minitest-deluxe
+* minitest-extra-assertions
+* minitest-rails-shoulda
+* minitest-spec
+* minitest-spec-should
+* minitest-sugar
+* minitest_should
+* mongoid-minitest
+* spork-minitest
+
+== REQUIREMENTS:
+
+* Ruby 1.8, maybe even 1.6 or lower. No magic is involved.
+
+== INSTALL:
+
+  sudo gem install minitest
+
+On 1.9, you already have it. To get newer candy you can still install
+the gem, but you'll need to activate the gem explicitly to use it:
+
+  require 'rubygems'
+  gem 'minitest' # ensures you're using the gem, and not the built in MT
+  require 'minitest/autorun'
+
+  # ... usual testing stuffs ...
+
+DO NOTE: There is a serious problem with the way that ruby 1.9/2.0
+packages their own gems. They install a gem specification file, but
+don't install the gem contents in the gem path. This messes up
+Gem.find_files and many other things (gem which, gem contents, etc).
+
+Just install minitest as a gem for real and you'll be happier.
+
+== LICENSE:
+
+(The MIT License)
+
+Copyright (c) Ryan Davis, seattle.rb
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/jni/ruby/test/lib/minitest/autorun.rb b/jni/ruby/test/lib/minitest/autorun.rb
new file mode 100644
index 0000000..88b1e05
--- /dev/null
+++ b/jni/ruby/test/lib/minitest/autorun.rb
@@ -0,0 +1,13 @@
+# encoding: utf-8
+
+begin
+  require 'rubygems'
+  gem 'minitest'
+rescue Gem::LoadError
+  # do nothing
+end
+
+require 'minitest/unit'
+require 'minitest/mock'
+
+MiniTest::Unit.autorun
diff --git a/jni/ruby/test/lib/minitest/benchmark.rb b/jni/ruby/test/lib/minitest/benchmark.rb
new file mode 100644
index 0000000..5195fc0
--- /dev/null
+++ b/jni/ruby/test/lib/minitest/benchmark.rb
@@ -0,0 +1,417 @@
+# encoding: utf-8
+
+require 'minitest/unit'
+
+class MiniTest::Unit # :nodoc:
+  def run_benchmarks # :nodoc:
+    _run_anything :benchmark
+  end
+
+  def benchmark_suite_header suite # :nodoc:
+    "\n#{suite}\t#{suite.bench_range.join("\t")}"
+  end
+
+  class TestCase
+    ##
+    # Returns a set of ranges stepped exponentially from +min+ to
+    # +max+ by powers of +base+. Eg:
+    #
+    #   bench_exp(2, 16, 2) # => [2, 4, 8, 16]
+
+    def self.bench_exp min, max, base = 10
+      min = (Math.log10(min) / Math.log10(base)).to_i
+      max = (Math.log10(max) / Math.log10(base)).to_i
+
+      (min..max).map { |m| base ** m }.to_a
+    end
+
+    ##
+    # Returns a set of ranges stepped linearly from +min+ to +max+ by
+    # +step+. Eg:
+    #
+    #   bench_linear(20, 40, 10) # => [20, 30, 40]
+
+    def self.bench_linear min, max, step = 10
+      (min..max).step(step).to_a
+    rescue LocalJumpError # 1.8.6
+      r = []; (min..max).step(step) { |n| r << n }; r
+    end
+
+    ##
+    # Returns the benchmark methods (methods that start with bench_)
+    # for that class.
+
+    def self.benchmark_methods # :nodoc:
+      public_instance_methods(true).grep(/^bench_/).map { |m| m.to_s }.sort
+    end
+
+    ##
+    # Returns all test suites that have benchmark methods.
+
+    def self.benchmark_suites
+      TestCase.test_suites.reject { |s| s.benchmark_methods.empty? }
+    end
+
+    ##
+    # Specifies the ranges used for benchmarking for that class.
+    # Defaults to exponential growth from 1 to 10k by powers of 10.
+    # Override if you need different ranges for your benchmarks.
+    #
+    # See also: ::bench_exp and ::bench_linear.
+
+    def self.bench_range
+      bench_exp 1, 10_000
+    end
+
+    ##
+    # Runs the given +work+, gathering the times of each run. Range
+    # and times are then passed to a given +validation+ proc. Outputs
+    # the benchmark name and times in tab-separated format, making it
+    # easy to paste into a spreadsheet for graphing or further
+    # analysis.
+    #
+    # Ranges are specified by ::bench_range.
+    #
+    # Eg:
+    #
+    #   def bench_algorithm
+    #     validation = proc { |x, y| ... }
+    #     assert_performance validation do |n|
+    #       @obj.algorithm(n)
+    #     end
+    #   end
+
+    def assert_performance validation, &work
+      range = self.class.bench_range
+
+      io.print "#{__name__}"
+
+      times = []
+
+      range.each do |x|
+        GC.start
+        t0 = Time.now
+        instance_exec(x, &work)
+        t = Time.now - t0
+
+        io.print "\t%9.6f" % t
+        times << t
+      end
+      io.puts
+
+      validation[range, times]
+    end
+
+    ##
+    # Runs the given +work+ and asserts that the times gathered fit to
+    # match a constant rate (eg, linear slope == 0) within a given
+    # +threshold+. Note: because we're testing for a slope of 0, R^2
+    # is not a good determining factor for the fit, so the threshold
+    # is applied against the slope itself. As such, you probably want
+    # to tighten it from the default.
+    #
+    # See http://www.graphpad.com/curvefit/goodness_of_fit.htm for
+    # more details.
+    #
+    # Fit is calculated by #fit_linear.
+    #
+    # Ranges are specified by ::bench_range.
+    #
+    # Eg:
+    #
+    #   def bench_algorithm
+    #     assert_performance_constant 0.9999 do |n|
+    #       @obj.algorithm(n)
+    #     end
+    #   end
+
+    def assert_performance_constant threshold = 0.99, &work
+      validation = proc do |range, times|
+        a, b, rr = fit_linear range, times
+        assert_in_delta 0, b, 1 - threshold
+        [a, b, rr]
+      end
+
+      assert_performance validation, &work
+    end
+
+    ##
+    # Runs the given +work+ and asserts that the times gathered fit to
+    # match a exponential curve within a given error +threshold+.
+    #
+    # Fit is calculated by #fit_exponential.
+    #
+    # Ranges are specified by ::bench_range.
+    #
+    # Eg:
+    #
+    #   def bench_algorithm
+    #     assert_performance_exponential 0.9999 do |n|
+    #       @obj.algorithm(n)
+    #     end
+    #   end
+
+    def assert_performance_exponential threshold = 0.99, &work
+      assert_performance validation_for_fit(:exponential, threshold), &work
+    end
+
+    ##
+    # Runs the given +work+ and asserts that the times gathered fit to
+    # match a logarithmic curve within a given error +threshold+.
+    #
+    # Fit is calculated by #fit_logarithmic.
+    #
+    # Ranges are specified by ::bench_range.
+    #
+    # Eg:
+    #
+    #   def bench_algorithm
+    #     assert_performance_logarithmic 0.9999 do |n|
+    #       @obj.algorithm(n)
+    #     end
+    #   end
+
+    def assert_performance_logarithmic threshold = 0.99, &work
+      assert_performance validation_for_fit(:logarithmic, threshold), &work
+    end
+
+    ##
+    # Runs the given +work+ and asserts that the times gathered fit to
+    # match a straight line within a given error +threshold+.
+    #
+    # Fit is calculated by #fit_linear.
+    #
+    # Ranges are specified by ::bench_range.
+    #
+    # Eg:
+    #
+    #   def bench_algorithm
+    #     assert_performance_linear 0.9999 do |n|
+    #       @obj.algorithm(n)
+    #     end
+    #   end
+
+    def assert_performance_linear threshold = 0.99, &work
+      assert_performance validation_for_fit(:linear, threshold), &work
+    end
+
+    ##
+    # Runs the given +work+ and asserts that the times gathered curve
+    # fit to match a power curve within a given error +threshold+.
+    #
+    # Fit is calculated by #fit_power.
+    #
+    # Ranges are specified by ::bench_range.
+    #
+    # Eg:
+    #
+    #   def bench_algorithm
+    #     assert_performance_power 0.9999 do |x|
+    #       @obj.algorithm
+    #     end
+    #   end
+
+    def assert_performance_power threshold = 0.99, &work
+      assert_performance validation_for_fit(:power, threshold), &work
+    end
+
+    ##
+    # Takes an array of x/y pairs and calculates the general R^2 value.
+    #
+    # See: http://en.wikipedia.org/wiki/Coefficient_of_determination
+
+    def fit_error xys
+      y_bar  = sigma(xys) { |x, y| y } / xys.size.to_f
+      ss_tot = sigma(xys) { |x, y| (y    - y_bar) ** 2 }
+      ss_err = sigma(xys) { |x, y| (yield(x) - y) ** 2 }
+
+      1 - (ss_err / ss_tot)
+    end
+
+    ##
+    # To fit a functional form: y = ae^(bx).
+    #
+    # Takes x and y values and returns [a, b, r^2].
+    #
+    # See: http://mathworld.wolfram.com/LeastSquaresFittingExponential.html
+
+    def fit_exponential xs, ys
+      n     = xs.size
+      xys   = xs.zip(ys)
+      sxlny = sigma(xys) { |x,y| x * Math.log(y) }
+      slny  = sigma(xys) { |x,y| Math.log(y)     }
+      sx2   = sigma(xys) { |x,y| x * x           }
+      sx    = sigma xs
+
+      c = n * sx2 - sx ** 2
+      a = (slny * sx2 - sx * sxlny) / c
+      b = ( n * sxlny - sx * slny ) / c
+
+      return Math.exp(a), b, fit_error(xys) { |x| Math.exp(a + b * x) }
+    end
+
+    ##
+    # To fit a functional form: y = a + b*ln(x).
+    #
+    # Takes x and y values and returns [a, b, r^2].
+    #
+    # See: http://mathworld.wolfram.com/LeastSquaresFittingLogarithmic.html
+
+    def fit_logarithmic xs, ys
+      n     = xs.size
+      xys   = xs.zip(ys)
+      slnx2 = sigma(xys) { |x,y| Math.log(x) ** 2 }
+      slnx  = sigma(xys) { |x,y| Math.log(x)      }
+      sylnx = sigma(xys) { |x,y| y * Math.log(x)  }
+      sy    = sigma(xys) { |x,y| y                }
+
+      c = n * slnx2 - slnx ** 2
+      b = ( n * sylnx - sy * slnx ) / c
+      a = (sy - b * slnx) / n
+
+      return a, b, fit_error(xys) { |x| a + b * Math.log(x) }
+    end
+
+
+    ##
+    # Fits the functional form: a + bx.
+    #
+    # Takes x and y values and returns [a, b, r^2].
+    #
+    # See: http://mathworld.wolfram.com/LeastSquaresFitting.html
+
+    def fit_linear xs, ys
+      n   = xs.size
+      xys = xs.zip(ys)
+      sx  = sigma xs
+      sy  = sigma ys
+      sx2 = sigma(xs)  { |x|   x ** 2 }
+      sxy = sigma(xys) { |x,y| x * y  }
+
+      c = n * sx2 - sx**2
+      a = (sy * sx2 - sx * sxy) / c
+      b = ( n * sxy - sx * sy ) / c
+
+      return a, b, fit_error(xys) { |x| a + b * x }
+    end
+
+    ##
+    # To fit a functional form: y = ax^b.
+    #
+    # Takes x and y values and returns [a, b, r^2].
+    #
+    # See: http://mathworld.wolfram.com/LeastSquaresFittingPowerLaw.html
+
+    def fit_power xs, ys
+      n       = xs.size
+      xys     = xs.zip(ys)
+      slnxlny = sigma(xys) { |x, y| Math.log(x) * Math.log(y) }
+      slnx    = sigma(xs)  { |x   | Math.log(x)               }
+      slny    = sigma(ys)  { |   y| Math.log(y)               }
+      slnx2   = sigma(xs)  { |x   | Math.log(x) ** 2          }
+
+      b = (n * slnxlny - slnx * slny) / (n * slnx2 - slnx ** 2);
+      a = (slny - b * slnx) / n
+
+      return Math.exp(a), b, fit_error(xys) { |x| (Math.exp(a) * (x ** b)) }
+    end
+
+    ##
+    # Enumerates over +enum+ mapping +block+ if given, returning the
+    # sum of the result. Eg:
+    #
+    #   sigma([1, 2, 3])                # => 1 + 2 + 3 => 7
+    #   sigma([1, 2, 3]) { |n| n ** 2 } # => 1 + 4 + 9 => 14
+
+    def sigma enum, &block
+      enum = enum.map(&block) if block
+      enum.inject { |sum, n| sum + n }
+    end
+
+    ##
+    # Returns a proc that calls the specified fit method and asserts
+    # that the error is within a tolerable threshold.
+
+    def validation_for_fit msg, threshold
+      proc do |range, times|
+        a, b, rr = send "fit_#{msg}", range, times
+        assert_operator rr, :>=, threshold
+        [a, b, rr]
+      end
+    end
+  end
+end
+
+class MiniTest::Spec
+  ##
+  # This is used to define a new benchmark method. You usually don't
+  # use this directly and is intended for those needing to write new
+  # performance curve fits (eg: you need a specific polynomial fit).
+  #
+  # See ::bench_performance_linear for an example of how to use this.
+
+  def self.bench name, &block
+    define_method "bench_#{name.gsub(/\W+/, '_')}", &block
+  end
+
+  ##
+  # Specifies the ranges used for benchmarking for that class.
+  #
+  #   bench_range do
+  #     bench_exp(2, 16, 2)
+  #   end
+  #
+  # See Unit::TestCase.bench_range for more details.
+
+  def self.bench_range &block
+    return super unless block
+
+    meta = (class << self; self; end)
+    meta.send :define_method, "bench_range", &block
+  end
+
+  ##
+  # Create a benchmark that verifies that the performance is linear.
+  #
+  #   describe "my class" do
+  #     bench_performance_linear "fast_algorithm", 0.9999 do |n|
+  #       @obj.fast_algorithm(n)
+  #     end
+  #   end
+
+  def self.bench_performance_linear name, threshold = 0.99, &work
+    bench name do
+      assert_performance_linear threshold, &work
+    end
+  end
+
+  ##
+  # Create a benchmark that verifies that the performance is constant.
+  #
+  #   describe "my class" do
+  #     bench_performance_constant "zoom_algorithm!" do |n|
+  #       @obj.zoom_algorithm!(n)
+  #     end
+  #   end
+
+  def self.bench_performance_constant name, threshold = 0.99, &work
+    bench name do
+      assert_performance_constant threshold, &work
+    end
+  end
+
+  ##
+  # Create a benchmark that verifies that the performance is exponential.
+  #
+  #   describe "my class" do
+  #     bench_performance_exponential "algorithm" do |n|
+  #       @obj.algorithm(n)
+  #     end
+  #   end
+
+  def self.bench_performance_exponential name, threshold = 0.99, &work
+    bench name do
+      assert_performance_exponential threshold, &work
+    end
+  end
+end
diff --git a/jni/ruby/test/lib/minitest/mock.rb b/jni/ruby/test/lib/minitest/mock.rb
new file mode 100644
index 0000000..19acaff
--- /dev/null
+++ b/jni/ruby/test/lib/minitest/mock.rb
@@ -0,0 +1,195 @@
+# encoding: utf-8
+
+class MockExpectationError < StandardError; end # :nodoc:
+
+##
+# A simple and clean mock object framework.
+
+module MiniTest # :nodoc:
+
+  ##
+  # All mock objects are an instance of Mock
+
+  class Mock
+    alias :__respond_to? :respond_to?
+
+    skip_methods = %w(object_id respond_to_missing? inspect === to_s)
+
+    instance_methods.each do |m|
+      undef_method m unless skip_methods.include?(m.to_s) || m =~ /^__/
+    end
+
+    def initialize # :nodoc:
+      @expected_calls = Hash.new { |calls, name| calls[name] = [] }
+      @actual_calls   = Hash.new { |calls, name| calls[name] = [] }
+    end
+
+    ##
+    # Expect that method +name+ is called, optionally with +args+ or a
+    # +blk+, and returns +retval+.
+    #
+    #   @mock.expect(:meaning_of_life, 42)
+    #   @mock.meaning_of_life # => 42
+    #
+    #   @mock.expect(:do_something_with, true, [some_obj, true])
+    #   @mock.do_something_with(some_obj, true) # => true
+    #
+    #   @mock.expect(:do_something_else, true) do |a1, a2|
+    #     a1 == "buggs" && a2 == :bunny
+    #   end
+    #
+    # +args+ is compared to the expected args using case equality (ie, the
+    # '===' operator), allowing for less specific expectations.
+    #
+    #   @mock.expect(:uses_any_string, true, [String])
+    #   @mock.uses_any_string("foo") # => true
+    #   @mock.verify  # => true
+    #
+    #   @mock.expect(:uses_one_string, true, ["foo"]
+    #   @mock.uses_one_string("bar") # => true
+    #   @mock.verify  # => raises MockExpectationError
+
+    def expect(name, retval, args=[], &blk)
+      if block_given?
+        raise ArgumentError, "args ignored when block given" unless args.empty?
+        @expected_calls[name] << { :retval => retval, :block => blk }
+      else
+        raise ArgumentError, "args must be an array" unless Array === args
+        @expected_calls[name] << { :retval => retval, :args => args }
+      end
+      self
+    end
+
+    def __call name, data # :nodoc:
+      case data
+      when Hash then
+        "#{name}(#{data[:args].inspect[1..-2]}) => #{data[:retval].inspect}"
+      else
+        data.map { |d| __call name, d }.join ", "
+      end
+    end
+
+    ##
+    # Verify that all methods were called as expected. Raises
+    # +MockExpectationError+ if the mock object was not called as
+    # expected.
+
+    def verify
+      @expected_calls.each do |name, calls|
+        calls.each do |expected|
+          msg1 = "expected #{__call name, expected}"
+          msg2 = "#{msg1}, got [#{__call name, @actual_calls[name]}]"
+
+          raise MockExpectationError, msg2 if
+            @actual_calls.has_key?(name) and
+            not @actual_calls[name].include?(expected)
+
+          raise MockExpectationError, msg1 unless
+            @actual_calls.has_key?(name) and
+            @actual_calls[name].include?(expected)
+        end
+      end
+      true
+    end
+
+    def method_missing(sym, *args) # :nodoc:
+      unless @expected_calls.has_key?(sym) then
+        raise NoMethodError, "unmocked method %p, expected one of %p" %
+          [sym, @expected_calls.keys.sort_by(&:to_s)]
+      end
+
+      index = @actual_calls[sym].length
+      expected_call = @expected_calls[sym][index]
+
+      unless expected_call then
+        raise MockExpectationError, "No more expects available for %p: %p" %
+          [sym, args]
+      end
+
+      expected_args, retval, val_block =
+        expected_call.values_at(:args, :retval, :block)
+
+      if val_block then
+        raise MockExpectationError, "mocked method %p failed block w/ %p" %
+          [sym, args] unless val_block.call(args)
+
+        # keep "verify" happy
+        @actual_calls[sym] << expected_call
+        return retval
+      end
+
+      if expected_args.size != args.size then
+        raise ArgumentError, "mocked method %p expects %d arguments, got %d" %
+          [sym, expected_args.size, args.size]
+      end
+
+      fully_matched = expected_args.zip(args).all? { |mod, a|
+        mod === a or mod == a
+      }
+
+      unless fully_matched then
+        raise MockExpectationError, "mocked method %p called with unexpected arguments %p" %
+          [sym, args]
+      end
+
+      @actual_calls[sym] << {
+        :retval => retval,
+        :args => expected_args.zip(args).map { |mod, a| mod === a ? mod : a }
+      }
+
+      retval
+    end
+
+    def respond_to?(sym, include_private = false) # :nodoc:
+      return true if @expected_calls.has_key?(sym.to_sym)
+      return __respond_to?(sym, include_private)
+    end
+  end
+end
+
+class Object # :nodoc:
+
+  ##
+  # Add a temporary stubbed method replacing +name+ for the duration
+  # of the +block+. If +val_or_callable+ responds to #call, then it
+  # returns the result of calling it, otherwise returns the value
+  # as-is. Cleans up the stub at the end of the +block+. The method
+  # +name+ must exist before stubbing.
+  #
+  #     def test_stale_eh
+  #       obj_under_test = Something.new
+  #       refute obj_under_test.stale?
+  #
+  #       Time.stub :now, Time.at(0) do
+  #         assert obj_under_test.stale?
+  #       end
+  #     end
+
+  def stub name, val_or_callable, &block
+    new_name = "__minitest_stub__#{name}"
+
+    metaclass = class << self; self; end
+
+    if respond_to? name and not methods.map(&:to_s).include? name.to_s then
+      metaclass.send :define_method, name do |*args|
+        super(*args)
+      end
+    end
+
+    metaclass.send :alias_method, new_name, name
+
+    metaclass.send :define_method, name do |*args|
+      if val_or_callable.respond_to? :call then
+        val_or_callable.call(*args)
+      else
+        val_or_callable
+      end
+    end
+
+    yield self
+  ensure
+    metaclass.send :undef_method, name
+    metaclass.send :alias_method, name, new_name
+    metaclass.send :undef_method, new_name
+  end
+end
diff --git a/jni/ruby/test/lib/minitest/unit.rb b/jni/ruby/test/lib/minitest/unit.rb
new file mode 100644
index 0000000..0a6558d
--- /dev/null
+++ b/jni/ruby/test/lib/minitest/unit.rb
@@ -0,0 +1,1419 @@
+# encoding: utf-8
+
+require "optparse"
+require "rbconfig"
+require "leakchecker"
+
+##
+# Minimal (mostly drop-in) replacement for test-unit.
+#
+# :include: README.txt
+
+module MiniTest
+
+  def self.const_missing name # :nodoc:
+    case name
+    when :MINI_DIR then
+      msg = "MiniTest::MINI_DIR was removed. Don't violate other's internals."
+      warn "WAR\NING: #{msg}"
+      warn "WAR\NING: Used by #{caller.first}."
+      const_set :MINI_DIR, "bad value"
+    else
+      super
+    end
+  end
+
+  ##
+  # Assertion base class
+
+  class Assertion < Exception; end
+
+  ##
+  # Assertion raised when skipping a test
+
+  class Skip < Assertion; end
+
+  class << self
+    ##
+    # Filter object for backtraces.
+
+    attr_accessor :backtrace_filter
+  end
+
+  class BacktraceFilter # :nodoc:
+    def filter bt
+      return ["No backtrace"] unless bt
+
+      new_bt = []
+
+      unless $DEBUG then
+        bt.each do |line|
+          break if line =~ /lib\/minitest/
+          new_bt << line
+        end
+
+        new_bt = bt.reject { |line| line =~ /lib\/minitest/ } if new_bt.empty?
+        new_bt = bt.dup if new_bt.empty?
+      else
+        new_bt = bt.dup
+      end
+
+      new_bt
+    end
+  end
+
+  self.backtrace_filter = BacktraceFilter.new
+
+  def self.filter_backtrace bt # :nodoc:
+    backtrace_filter.filter bt
+  end
+
+  ##
+  # MiniTest Assertions.  All assertion methods accept a +msg+ which is
+  # printed if the assertion fails.
+
+  module Assertions
+    UNDEFINED = Object.new # :nodoc:
+
+    def UNDEFINED.inspect # :nodoc:
+      "UNDEFINED" # again with the rdoc bugs... :(
+    end
+
+    ##
+    # Returns the diff command to use in #diff. Tries to intelligently
+    # figure out what diff to use.
+
+    def self.diff
+      @diff = if (RbConfig::CONFIG['host_os'] =~ /mswin|mingw/ &&
+                  system("diff.exe", __FILE__, __FILE__)) then
+                "diff.exe -u"
+              elsif Minitest::Unit::Guard.maglev? then # HACK
+                "diff -u"
+              elsif system("gdiff", __FILE__, __FILE__)
+                "gdiff -u" # solaris and kin suck
+              elsif system("diff", __FILE__, __FILE__)
+                "diff -u"
+              else
+                nil
+              end unless defined? @diff
+
+      @diff
+    end
+
+    ##
+    # Set the diff command to use in #diff.
+
+    def self.diff= o
+      @diff = o
+    end
+
+    ##
+    # Returns a diff between +exp+ and +act+. If there is no known
+    # diff command or if it doesn't make sense to diff the output
+    # (single line, short output), then it simply returns a basic
+    # comparison between the two.
+
+    def diff exp, act
+      require "tempfile"
+
+      expect = mu_pp_for_diff exp
+      butwas = mu_pp_for_diff act
+      result = nil
+
+      need_to_diff =
+        MiniTest::Assertions.diff &&
+        (expect.include?("\n")    ||
+         butwas.include?("\n")    ||
+         expect.size > 30         ||
+         butwas.size > 30         ||
+         expect == butwas)
+
+      return "Expected: #{mu_pp exp}\n  Actual: #{mu_pp act}" unless
+        need_to_diff
+
+      tempfile_a = nil
+      tempfile_b = nil
+
+      Tempfile.open("expect") do |a|
+        tempfile_a = a
+        a.puts expect
+        a.flush
+
+        Tempfile.open("butwas") do |b|
+          tempfile_b = b
+          b.puts butwas
+          b.flush
+
+          result = `#{MiniTest::Assertions.diff} #{a.path} #{b.path}`
+          result.sub!(/^\-\-\- .+/, "--- expected")
+          result.sub!(/^\+\+\+ .+/, "+++ actual")
+
+          if result.empty? then
+            klass = exp.class
+            result = [
+                      "No visible difference in the #{klass}#inspect output.\n",
+                      "You should look at the implementation of #== on ",
+                      "#{klass} or its members.\n",
+                      expect,
+                     ].join
+          end
+        end
+      end
+
+      result
+    ensure
+      tempfile_a.close! if tempfile_a
+      tempfile_b.close! if tempfile_b
+    end
+
+    ##
+    # This returns a human-readable version of +obj+. By default
+    # #inspect is called. You can override this to use #pretty_print
+    # if you want.
+
+    def mu_pp obj
+      s = obj.inspect
+      s = s.encode Encoding.default_external if defined? Encoding
+      s
+    end
+
+    ##
+    # This returns a diff-able human-readable version of +obj+. This
+    # differs from the regular mu_pp because it expands escaped
+    # newlines and makes hex-values generic (like object_ids). This
+    # uses mu_pp to do the first pass and then cleans it up.
+
+    def mu_pp_for_diff obj
+      mu_pp(obj).gsub(/\\n/, "\n").gsub(/:0x[a-fA-F0-9]{4,}/m, ':0xXXXXXX')
+    end
+
+    def _assertions= n # :nodoc:
+      @_assertions = n
+    end
+
+    def _assertions # :nodoc:
+      @_assertions ||= 0
+    end
+
+    ##
+    # Fails unless +test+ is a true value.
+
+    def assert test, msg = nil
+      msg ||= "Failed assertion, no message given."
+      self._assertions += 1
+      unless test then
+        msg = msg.call if Proc === msg
+        raise MiniTest::Assertion, msg
+      end
+      true
+    end
+
+    ##
+    # Fails unless +obj+ is empty.
+
+    def assert_empty obj, msg = nil
+      msg = message(msg) { "Expected #{mu_pp(obj)} to be empty" }
+      assert_respond_to obj, :empty?
+      assert obj.empty?, msg
+    end
+
+    ##
+    # Fails unless <tt>exp == act</tt> printing the difference between
+    # the two, if possible.
+    #
+    # If there is no visible difference but the assertion fails, you
+    # should suspect that your #== is buggy, or your inspect output is
+    # missing crucial details.
+    #
+    # For floats use assert_in_delta.
+    #
+    # See also: MiniTest::Assertions.diff
+
+    def assert_equal exp, act, msg = nil
+      msg = message(msg, "") { diff exp, act }
+      assert exp == act, msg
+    end
+
+    ##
+    # For comparing Floats.  Fails unless +exp+ and +act+ are within +delta+
+    # of each other.
+    #
+    #   assert_in_delta Math::PI, (22.0 / 7.0), 0.01
+
+    def assert_in_delta exp, act, delta = 0.001, msg = nil
+      n = (exp - act).abs
+      msg = message(msg) {
+        "Expected |#{exp} - #{act}| (#{n}) to be <= #{delta}"
+      }
+      assert delta >= n, msg
+    end
+
+    ##
+    # For comparing Floats.  Fails unless +exp+ and +act+ have a relative
+    # error less than +epsilon+.
+
+    def assert_in_epsilon a, b, epsilon = 0.001, msg = nil
+      assert_in_delta a, b, [a.abs, b.abs].min * epsilon, msg
+    end
+
+    ##
+    # Fails unless +collection+ includes +obj+.
+
+    def assert_includes collection, obj, msg = nil
+      msg = message(msg) {
+        "Expected #{mu_pp(collection)} to include #{mu_pp(obj)}"
+      }
+      assert_respond_to collection, :include?
+      assert collection.include?(obj), msg
+    end
+
+    ##
+    # Fails unless +obj+ is an instance of +cls+.
+
+    def assert_instance_of cls, obj, msg = nil
+      msg = message(msg) {
+        "Expected #{mu_pp(obj)} to be an instance of #{cls}, not #{obj.class}"
+      }
+
+      assert obj.instance_of?(cls), msg
+    end
+
+    ##
+    # Fails unless +obj+ is a kind of +cls+.
+
+    def assert_kind_of cls, obj, msg = nil # TODO: merge with instance_of
+      msg = message(msg) {
+        "Expected #{mu_pp(obj)} to be a kind of #{cls}, not #{obj.class}" }
+
+      assert obj.kind_of?(cls), msg
+    end
+
+    ##
+    # Fails unless +matcher+ <tt>=~</tt> +obj+.
+
+    def assert_match matcher, obj, msg = nil
+      msg = message(msg) { "Expected #{mu_pp matcher} to match #{mu_pp obj}" }
+      assert_respond_to matcher, :"=~"
+      matcher = Regexp.new Regexp.escape matcher if String === matcher
+      assert matcher =~ obj, msg
+    end
+
+    ##
+    # Fails unless +obj+ is nil
+
+    def assert_nil obj, msg = nil
+      msg = message(msg) { "Expected #{mu_pp(obj)} to be nil" }
+      assert obj.nil?, msg
+    end
+
+    ##
+    # For testing with binary operators.
+    #
+    #   assert_operator 5, :<=, 4
+
+    def assert_operator o1, op, o2 = UNDEFINED, msg = nil
+      return assert_predicate o1, op, msg if UNDEFINED == o2
+      msg = message(msg) { "Expected #{mu_pp(o1)} to be #{op} #{mu_pp(o2)}" }
+      assert o1.__send__(op, o2), msg
+    end
+
+    ##
+    # Fails if stdout or stderr do not output the expected results.
+    # Pass in nil if you don't care about that streams output. Pass in
+    # "" if you require it to be silent. Pass in a regexp if you want
+    # to pattern match.
+    #
+    # NOTE: this uses #capture_io, not #capture_subprocess_io.
+    #
+    # See also: #assert_silent
+
+    def assert_output stdout = nil, stderr = nil
+      out, err = capture_io do
+        yield
+      end
+
+      err_msg = Regexp === stderr ? :assert_match : :assert_equal if stderr
+      out_msg = Regexp === stdout ? :assert_match : :assert_equal if stdout
+
+      y = send err_msg, stderr, err, "In stderr" if err_msg
+      x = send out_msg, stdout, out, "In stdout" if out_msg
+
+      (!stdout || x) && (!stderr || y)
+    end
+
+    ##
+    # For testing with predicates.
+    #
+    #   assert_predicate str, :empty?
+    #
+    # This is really meant for specs and is front-ended by assert_operator:
+    #
+    #   str.must_be :empty?
+
+    def assert_predicate o1, op, msg = nil
+      msg = message(msg) { "Expected #{mu_pp(o1)} to be #{op}" }
+      assert o1.__send__(op), msg
+    end
+
+    ##
+    # Fails unless the block raises one of +exp+. Returns the
+    # exception matched so you can check the message, attributes, etc.
+
+    def assert_raises *exp
+      msg = "#{exp.pop}.\n" if String === exp.last
+
+      begin
+        yield
+      rescue MiniTest::Skip => e
+        return e if exp.include? MiniTest::Skip
+        raise e
+      rescue Exception => e
+        expected = exp.any? { |ex|
+          if ex.instance_of? Module then
+            e.kind_of? ex
+          else
+            e.instance_of? ex
+          end
+        }
+
+        assert expected, proc {
+          exception_details(e, "#{msg}#{mu_pp(exp)} exception expected, not")
+        }
+
+        return e
+      end
+
+      exp = exp.first if exp.size == 1
+
+      flunk "#{msg}#{mu_pp(exp)} expected but nothing was raised."
+    end
+
+    ##
+    # Fails unless +obj+ responds to +meth+.
+
+    def assert_respond_to obj, meth, msg = nil
+      msg = message(msg) {
+        "Expected #{mu_pp(obj)} (#{obj.class}) to respond to ##{meth}"
+      }
+      assert obj.respond_to?(meth), msg
+    end
+
+    ##
+    # Fails unless +exp+ and +act+ are #equal?
+
+    def assert_same exp, act, msg = nil
+      msg = message(msg) {
+        data = [mu_pp(act), act.object_id, mu_pp(exp), exp.object_id]
+        "Expected %s (oid=%d) to be the same as %s (oid=%d)" % data
+      }
+      assert exp.equal?(act), msg
+    end
+
+    ##
+    # +send_ary+ is a receiver, message and arguments.
+    #
+    # Fails unless the call returns a true value
+    # TODO: I should prolly remove this from specs
+
+    def assert_send send_ary, m = nil
+      recv, msg, *args = send_ary
+      m = message(m) {
+        "Expected #{mu_pp(recv)}.#{msg}(*#{mu_pp(args)}) to return true" }
+      assert recv.__send__(msg, *args), m
+    end
+
+    ##
+    # Fails if the block outputs anything to stderr or stdout.
+    #
+    # See also: #assert_output
+
+    def assert_silent
+      assert_output "", "" do
+        yield
+      end
+    end
+
+    ##
+    # Fails unless the block throws +sym+
+
+    def assert_throws sym, msg = nil
+      default = "Expected #{mu_pp(sym)} to have been thrown"
+      caught = true
+      catch(sym) do
+        begin
+          yield
+        rescue ThreadError => e       # wtf?!? 1.8 + threads == suck
+          default += ", not \:#{e.message[/uncaught throw \`(\w+?)\'/, 1]}"
+        rescue ArgumentError => e     # 1.9 exception
+          default += ", not #{e.message.split(/ /).last}"
+        rescue NameError => e         # 1.8 exception
+          default += ", not #{e.name.inspect}"
+        end
+        caught = false
+      end
+
+      assert caught, message(msg) { default }
+    end
+
+    ##
+    # Captures $stdout and $stderr into strings:
+    #
+    #   out, err = capture_io do
+    #     puts "Some info"
+    #     warn "You did a bad thing"
+    #   end
+    #
+    #   assert_match %r%info%, out
+    #   assert_match %r%bad%, err
+    #
+    # NOTE: For efficiency, this method uses StringIO and does not
+    # capture IO for subprocesses. Use #capture_subprocess_io for
+    # that.
+
+    def capture_io
+      require 'stringio'
+
+      captured_stdout, captured_stderr = StringIO.new, StringIO.new
+
+      synchronize do
+        orig_stdout, orig_stderr = $stdout, $stderr
+        $stdout, $stderr         = captured_stdout, captured_stderr
+
+        begin
+          yield
+        ensure
+          $stdout = orig_stdout
+          $stderr = orig_stderr
+        end
+      end
+
+      return captured_stdout.string, captured_stderr.string
+    end
+
+    ##
+    # Captures $stdout and $stderr into strings, using Tempfile to
+    # ensure that subprocess IO is captured as well.
+    #
+    #   out, err = capture_subprocess_io do
+    #     system "echo Some info"
+    #     system "echo You did a bad thing 1>&2"
+    #   end
+    #
+    #   assert_match %r%info%, out
+    #   assert_match %r%bad%, err
+    #
+    # NOTE: This method is approximately 10x slower than #capture_io so
+    # only use it when you need to test the output of a subprocess.
+
+    def capture_subprocess_io
+      require 'tempfile'
+
+      captured_stdout, captured_stderr = Tempfile.new("out"), Tempfile.new("err")
+
+      synchronize do
+        orig_stdout, orig_stderr = $stdout.dup, $stderr.dup
+        $stdout.reopen captured_stdout
+        $stderr.reopen captured_stderr
+
+        begin
+          yield
+
+          $stdout.rewind
+          $stderr.rewind
+
+          [captured_stdout.read, captured_stderr.read]
+        ensure
+          $stdout.reopen orig_stdout
+          $stderr.reopen orig_stderr
+          orig_stdout.close
+          orig_stderr.close
+          captured_stdout.close!
+          captured_stderr.close!
+        end
+      end
+    end
+
+    ##
+    # Returns details for exception +e+
+
+    def exception_details e, msg
+      [
+       "#{msg}",
+       "Class: <#{e.class}>",
+       "Message: <#{e.message.inspect}>",
+       "---Backtrace---",
+       "#{MiniTest::filter_backtrace(e.backtrace).join("\n")}",
+       "---------------",
+      ].join "\n"
+    end
+
+    ##
+    # Fails with +msg+
+
+    def flunk msg = nil
+      msg ||= "Epic Fail!"
+      assert false, msg
+    end
+
+    ##
+    # Returns a proc that will output +msg+ along with the default message.
+
+    def message msg = nil, ending = ".", &default
+      proc {
+        msg = msg.call.chomp(".") if Proc === msg
+        custom_message = "#{msg}.\n" unless msg.nil? or msg.to_s.empty?
+        "#{custom_message}#{default.call}#{ending}"
+      }
+    end
+
+    ##
+    # used for counting assertions
+
+    def pass msg = nil
+      assert true
+    end
+
+    ##
+    # Fails if +test+ is a true value
+
+    def refute test, msg = nil
+      msg ||= "Failed refutation, no message given"
+      not assert(! test, msg)
+    end
+
+    ##
+    # Fails if +obj+ is empty.
+
+    def refute_empty obj, msg = nil
+      msg = message(msg) { "Expected #{mu_pp(obj)} to not be empty" }
+      assert_respond_to obj, :empty?
+      refute obj.empty?, msg
+    end
+
+    ##
+    # Fails if <tt>exp == act</tt>.
+    #
+    # For floats use refute_in_delta.
+
+    def refute_equal exp, act, msg = nil
+      msg = message(msg) {
+        "Expected #{mu_pp(act)} to not be equal to #{mu_pp(exp)}"
+      }
+      refute exp == act, msg
+    end
+
+    ##
+    # For comparing Floats.  Fails if +exp+ is within +delta+ of +act+.
+    #
+    #   refute_in_delta Math::PI, (22.0 / 7.0)
+
+    def refute_in_delta exp, act, delta = 0.001, msg = nil
+      n = (exp - act).abs
+      msg = message(msg) {
+        "Expected |#{exp} - #{act}| (#{n}) to not be <= #{delta}"
+      }
+      refute delta >= n, msg
+    end
+
+    ##
+    # For comparing Floats.  Fails if +exp+ and +act+ have a relative error
+    # less than +epsilon+.
+
+    def refute_in_epsilon a, b, epsilon = 0.001, msg = nil
+      refute_in_delta a, b, a * epsilon, msg
+    end
+
+    ##
+    # Fails if +collection+ includes +obj+.
+
+    def refute_includes collection, obj, msg = nil
+      msg = message(msg) {
+        "Expected #{mu_pp(collection)} to not include #{mu_pp(obj)}"
+      }
+      assert_respond_to collection, :include?
+      refute collection.include?(obj), msg
+    end
+
+    ##
+    # Fails if +obj+ is an instance of +cls+.
+
+    def refute_instance_of cls, obj, msg = nil
+      msg = message(msg) {
+        "Expected #{mu_pp(obj)} to not be an instance of #{cls}"
+      }
+      refute obj.instance_of?(cls), msg
+    end
+
+    ##
+    # Fails if +obj+ is a kind of +cls+.
+
+    def refute_kind_of cls, obj, msg = nil # TODO: merge with instance_of
+      msg = message(msg) { "Expected #{mu_pp(obj)} to not be a kind of #{cls}" }
+      refute obj.kind_of?(cls), msg
+    end
+
+    ##
+    # Fails if +matcher+ <tt>=~</tt> +obj+.
+
+    def refute_match matcher, obj, msg = nil
+      msg = message(msg) {"Expected #{mu_pp matcher} to not match #{mu_pp obj}"}
+      assert_respond_to matcher, :"=~"
+      matcher = Regexp.new Regexp.escape matcher if String === matcher
+      refute matcher =~ obj, msg
+    end
+
+    ##
+    # Fails if +obj+ is nil.
+
+    def refute_nil obj, msg = nil
+      msg = message(msg) { "Expected #{mu_pp(obj)} to not be nil" }
+      refute obj.nil?, msg
+    end
+
+    ##
+    # Fails if +o1+ is not +op+ +o2+. Eg:
+    #
+    #   refute_operator 1, :>, 2 #=> pass
+    #   refute_operator 1, :<, 2 #=> fail
+
+    def refute_operator o1, op, o2 = UNDEFINED, msg = nil
+      return refute_predicate o1, op, msg if UNDEFINED == o2
+      msg = message(msg) { "Expected #{mu_pp(o1)} to not be #{op} #{mu_pp(o2)}"}
+      refute o1.__send__(op, o2), msg
+    end
+
+    ##
+    # For testing with predicates.
+    #
+    #   refute_predicate str, :empty?
+    #
+    # This is really meant for specs and is front-ended by refute_operator:
+    #
+    #   str.wont_be :empty?
+
+    def refute_predicate o1, op, msg = nil
+      msg = message(msg) { "Expected #{mu_pp(o1)} to not be #{op}" }
+      refute o1.__send__(op), msg
+    end
+
+    ##
+    # Fails if +obj+ responds to the message +meth+.
+
+    def refute_respond_to obj, meth, msg = nil
+      msg = message(msg) { "Expected #{mu_pp(obj)} to not respond to #{meth}" }
+
+      refute obj.respond_to?(meth), msg
+    end
+
+    ##
+    # Fails if +exp+ is the same (by object identity) as +act+.
+
+    def refute_same exp, act, msg = nil
+      msg = message(msg) {
+        data = [mu_pp(act), act.object_id, mu_pp(exp), exp.object_id]
+        "Expected %s (oid=%d) to not be the same as %s (oid=%d)" % data
+      }
+      refute exp.equal?(act), msg
+    end
+
+    ##
+    # Skips the current test. Gets listed at the end of the run but
+    # doesn't cause a failure exit code.
+
+    def skip msg = nil, bt = caller
+      msg ||= "Skipped, no message given"
+      @skip = true
+      raise MiniTest::Skip, msg, bt
+    end
+
+    ##
+    # Was this testcase skipped? Meant for #teardown.
+
+    def skipped?
+      defined?(@skip) and @skip
+    end
+
+    ##
+    # Takes a block and wraps it with the runner's shared mutex.
+
+    def synchronize
+      Minitest::Unit.runner.synchronize do
+        yield
+      end
+    end
+  end
+
+  class Unit # :nodoc:
+    VERSION = "4.7.5" # :nodoc:
+
+    attr_accessor :report, :failures, :errors, :skips # :nodoc:
+    attr_accessor :assertion_count                    # :nodoc:
+    attr_writer   :test_count                         # :nodoc:
+    attr_accessor :start_time                         # :nodoc:
+    attr_accessor :help                               # :nodoc:
+    attr_accessor :verbose                            # :nodoc:
+    attr_writer   :options                            # :nodoc:
+
+    ##
+    # :attr:
+    #
+    # if true, installs an "INFO" signal handler (only available to BSD and
+    # OS X users) which prints diagnostic information about the test run.
+    #
+    # This is auto-detected by default but may be overridden by custom
+    # runners.
+
+    attr_accessor :info_signal
+
+    ##
+    # Lazy accessor for options.
+
+    def options
+      @options ||= {}
+    end
+
+    @@installed_at_exit ||= false
+    @@out = $stdout
+    @@after_tests = []
+
+    ##
+    # A simple hook allowing you to run a block of code after _all_ of
+    # the tests are done. Eg:
+    #
+    #   MiniTest::Unit.after_tests { p $debugging_info }
+
+    def self.after_tests &block
+      @@after_tests << block
+    end
+
+    ##
+    # Registers MiniTest::Unit to run tests at process exit
+
+    def self.autorun
+      at_exit {
+        # don't run if there was a non-exit exception
+        next if $! and not $!.kind_of? SystemExit
+
+        # the order here is important. The at_exit handler must be
+        # installed before anyone else gets a chance to install their
+        # own, that way we can be assured that our exit will be last
+        # to run (at_exit stacks).
+        exit_code = nil
+
+        at_exit {
+          @@after_tests.reverse_each(&:call)
+          exit false if exit_code && exit_code != 0
+        }
+
+        exit_code = MiniTest::Unit.new.run ARGV
+      } unless @@installed_at_exit
+      @@installed_at_exit = true
+    end
+
+    ##
+    # Returns the stream to use for output.
+
+    def self.output
+      @@out
+    end
+
+    ##
+    # Sets MiniTest::Unit to write output to +stream+.  $stdout is the default
+    # output
+
+    def self.output= stream
+      @@out = stream
+    end
+
+    ##
+    # Tells MiniTest::Unit to delegate to +runner+, an instance of a
+    # MiniTest::Unit subclass, when MiniTest::Unit#run is called.
+
+    def self.runner= runner
+      @@runner = runner
+    end
+
+    ##
+    # Returns the MiniTest::Unit subclass instance that will be used
+    # to run the tests. A MiniTest::Unit instance is the default
+    # runner.
+
+    def self.runner
+      @@runner ||= self.new
+    end
+
+    ##
+    # Return all plugins' run methods (methods that start with "run_").
+
+    def self.plugins
+      @@plugins ||= (["run_tests"] +
+                     public_instance_methods(false).
+                     grep(/^run_/).map { |s| s.to_s }).uniq
+    end
+
+    ##
+    # Return the IO for output.
+
+    def output
+      self.class.output
+    end
+
+    def puts *a  # :nodoc:
+      output.puts(*a)
+    end
+
+    def print *a # :nodoc:
+      output.print(*a)
+    end
+
+    def test_count # :nodoc:
+      @test_count ||= 0
+    end
+
+    ##
+    # Runner for a given +type+ (eg, test vs bench).
+
+    def _run_anything type
+      suites = TestCase.send "#{type}_suites"
+      return if suites.empty?
+
+      start = Time.now
+
+      puts
+      puts "# Running #{type}s:"
+      puts
+
+      @test_count, @assertion_count = 0, 0
+      sync = output.respond_to? :"sync=" # stupid emacs
+      old_sync, output.sync = output.sync, true if sync
+
+      results = _run_suites suites, type
+
+      @test_count      = results.inject(0) { |sum, (tc, _)| sum + tc }
+      @assertion_count = results.inject(0) { |sum, (_, ac)| sum + ac }
+
+      output.sync = old_sync if sync
+
+      t = Time.now - start
+
+      puts
+      puts
+      puts "Finished #{type}s in %.6fs, %.4f tests/s, %.4f assertions/s." %
+        [t, test_count / t, assertion_count / t]
+
+      report.each_with_index do |msg, i|
+        puts "\n%3d) %s" % [i + 1, msg]
+      end
+
+      puts
+
+      status
+    end
+
+    ##
+    # Runs all the +suites+ for a given +type+.
+    #
+
+    def _run_suites suites, type
+      suites.map { |suite| _run_suite suite, type }
+    end
+
+    ##
+    # Run a single +suite+ for a given +type+.
+
+    def _run_suite suite, type
+      header = "#{type}_suite_header"
+      puts send(header, suite) if respond_to? header
+
+      filter = options[:filter] || '/./'
+      filter = Regexp.new $1 if filter =~ /\/(.*)\//
+
+      all_test_methods = suite.send "#{type}_methods"
+
+      filtered_test_methods = all_test_methods.find_all { |m|
+        filter === m || filter === "#{suite}##{m}"
+      }
+
+      leakchecker = LeakChecker.new
+
+      assertions = filtered_test_methods.map { |method|
+        inst = suite.new method
+        inst._assertions = 0
+
+        print "#{suite}##{method} = " if @verbose
+
+        start_time = Time.now if @verbose
+        result = inst.run self
+
+        print "%.2f s = " % (Time.now - start_time) if @verbose
+        print result
+        puts if @verbose
+        $stdout.flush
+
+        leakchecker.check("#{inst.class}\##{inst.__name__}")
+
+        inst._assertions
+      }
+
+      return assertions.size, assertions.inject(0) { |sum, n| sum + n }
+    end
+
+    ##
+    # Record the result of a single test. Makes it very easy to gather
+    # information. Eg:
+    #
+    #   class StatisticsRecorder < MiniTest::Unit
+    #     def record suite, method, assertions, time, error
+    #       # ... record the results somewhere ...
+    #     end
+    #   end
+    #
+    #   MiniTest::Unit.runner = StatisticsRecorder.new
+    #
+    # NOTE: record might be sent more than once per test.  It will be
+    # sent once with the results from the test itself.  If there is a
+    # failure or error in teardown, it will be sent again with the
+    # error or failure.
+
+    def record suite, method, assertions, time, error
+    end
+
+    def location e # :nodoc:
+      last_before_assertion = ""
+      e.backtrace.reverse_each do |s|
+        break if s =~ /in .(assert|refute|flunk|pass|fail|raise|must|wont)/
+        last_before_assertion = s
+      end
+      last_before_assertion.sub(/:in .*$/, '')
+    end
+
+    ##
+    # Writes status for failed test +meth+ in +klass+ which finished with
+    # exception +e+
+
+    def puke klass, meth, e
+      e = case e
+          when MiniTest::Skip then
+            @skips += 1
+            return "S" unless @verbose
+            "Skipped:\n#{klass}##{meth} [#{location e}]:\n#{e.message}\n"
+          when MiniTest::Assertion then
+            @failures += 1
+            "Failure:\n#{klass}##{meth} [#{location e}]:\n#{e.message}\n"
+          else
+            @errors += 1
+            bt = MiniTest::filter_backtrace(e.backtrace).join "\n    "
+            "Error:\n#{klass}##{meth}:\n#{e.class}: #{e.message}\n    #{bt}\n"
+          end
+      @report << e
+      e[0, 1]
+    end
+
+    def initialize # :nodoc:
+      @report = []
+      @errors = @failures = @skips = 0
+      @verbose = false
+      @mutex = defined?(Mutex) ? Mutex.new : nil
+      @info_signal = Signal.list['INFO']
+    end
+
+    def synchronize # :nodoc:
+      if @mutex then
+        @mutex.synchronize { yield }
+      else
+        yield
+      end
+    end
+
+    def process_args args = [] # :nodoc:
+      options = {}
+      orig_args = args.dup
+
+      OptionParser.new do |opts|
+        opts.banner  = 'minitest options:'
+        opts.version = MiniTest::Unit::VERSION
+
+        opts.on '-h', '--help', 'Display this help.' do
+          puts opts
+          exit
+        end
+
+        opts.on '-s', '--seed SEED', Integer, "Sets random seed" do |m|
+          options[:seed] = m.to_i
+        end
+
+        opts.on '-v', '--verbose', "Verbose. Show progress processing files." do
+          options[:verbose] = true
+        end
+
+        opts.on '-n', '--name PATTERN', "Filter test names on pattern (e.g. /foo/)" do |a|
+          options[:filter] = a
+        end
+
+        opts.parse! args
+        orig_args -= args
+      end
+
+      unless options[:seed] then
+        srand
+        options[:seed] = srand % 0xFFFF
+        orig_args << "--seed" << options[:seed].to_s
+      end
+
+      srand options[:seed]
+
+      self.verbose = options[:verbose]
+      @help = orig_args.map { |s| s =~ /[\s|&<>$()]/ ? s.inspect : s }.join " "
+
+      options
+    end
+
+    ##
+    # Begins the full test run. Delegates to +runner+'s #_run method.
+
+    def run args = []
+      self.class.runner._run(args)
+    end
+
+    ##
+    # Top level driver, controls all output and filtering.
+
+    def _run args = []
+      args = process_args args # ARGH!! blame test/unit process_args
+      self.options.merge! args
+
+      puts "Run options: #{help}"
+
+      self.class.plugins.each do |plugin|
+        send plugin
+        break unless report.empty?
+      end
+
+      return failures + errors if self.test_count > 0 # or return nil...
+    rescue Interrupt
+      abort 'Interrupted'
+    end
+
+    ##
+    # Runs test suites matching +filter+.
+
+    def run_tests
+      _run_anything :test
+    end
+
+    ##
+    # Writes status to +io+
+
+    def status io = self.output
+      format = "%d tests, %d assertions, %d failures, %d errors, %d skips"
+      io.puts format % [test_count, assertion_count, failures, errors, skips]
+    end
+
+    ##
+    # Provides a simple set of guards that you can use in your tests
+    # to skip execution if it is not applicable. These methods are
+    # mixed into TestCase as both instance and class methods so you
+    # can use them inside or outside of the test methods.
+    #
+    #   def test_something_for_mri
+    #     skip "bug 1234"  if jruby?
+    #     # ...
+    #   end
+    #
+    #   if windows? then
+    #     # ... lots of test methods ...
+    #   end
+
+    module Guard
+
+      ##
+      # Is this running on jruby?
+
+      def jruby? platform = RUBY_PLATFORM
+        "java" == platform
+      end
+
+      ##
+      # Is this running on mri?
+
+      def maglev? platform = defined?(RUBY_ENGINE) && RUBY_ENGINE
+        "maglev" == platform
+      end
+
+      module_function :maglev?
+
+      ##
+      # Is this running on mri?
+
+      def mri? platform = RUBY_DESCRIPTION
+        /^ruby/ =~ platform
+      end
+
+      ##
+      # Is this running on rubinius?
+
+      def rubinius? platform = defined?(RUBY_ENGINE) && RUBY_ENGINE
+        "rbx" == platform
+      end
+
+      ##
+      # Is this running on windows?
+
+      def windows? platform = RUBY_PLATFORM
+        /mswin|mingw/ =~ platform
+      end
+    end
+
+    ##
+    # Provides before/after hooks for setup and teardown. These are
+    # meant for library writers, NOT for regular test authors. See
+    # #before_setup for an example.
+
+    module LifecycleHooks
+      ##
+      # Runs before every test, after setup. This hook is meant for
+      # libraries to extend minitest. It is not meant to be used by
+      # test developers.
+      #
+      # See #before_setup for an example.
+
+      def after_setup; end
+
+      ##
+      # Runs before every test, before setup. This hook is meant for
+      # libraries to extend minitest. It is not meant to be used by
+      # test developers.
+      #
+      # As a simplistic example:
+      #
+      #   module MyMinitestPlugin
+      #     def before_setup
+      #       super
+      #       # ... stuff to do before setup is run
+      #     end
+      #
+      #     def after_setup
+      #       # ... stuff to do after setup is run
+      #       super
+      #     end
+      #
+      #     def before_teardown
+      #       super
+      #       # ... stuff to do before teardown is run
+      #     end
+      #
+      #     def after_teardown
+      #       # ... stuff to do after teardown is run
+      #       super
+      #     end
+      #   end
+      #
+      #   class MiniTest::Unit::TestCase
+      #     include MyMinitestPlugin
+      #   end
+
+      def before_setup; end
+
+      ##
+      # Runs after every test, before teardown. This hook is meant for
+      # libraries to extend minitest. It is not meant to be used by
+      # test developers.
+      #
+      # See #before_setup for an example.
+
+      def before_teardown; end
+
+      ##
+      # Runs after every test, after teardown. This hook is meant for
+      # libraries to extend minitest. It is not meant to be used by
+      # test developers.
+      #
+      # See #before_setup for an example.
+
+      def after_teardown; end
+    end
+
+    ##
+    # Subclass TestCase to create your own tests. Typically you'll want a
+    # TestCase subclass per implementation class.
+    #
+    # See MiniTest::Assertions
+
+    class TestCase
+      include LifecycleHooks
+      include Guard
+      extend Guard
+
+      attr_reader :__name__ # :nodoc:
+
+      PASSTHROUGH_EXCEPTIONS = [NoMemoryError, SignalException,
+                                Interrupt, SystemExit] # :nodoc:
+
+      ##
+      # Runs the tests reporting the status to +runner+
+
+      def run runner
+        trap "INFO" do
+          runner.report.each_with_index do |msg, i|
+            warn "\n%3d) %s" % [i + 1, msg]
+          end
+          warn ''
+          time = runner.start_time ? Time.now - runner.start_time : 0
+          warn "Current Test: %s#%s %.2fs" % [self.class, self.__name__, time]
+          runner.status $stderr
+        end if runner.info_signal
+
+        start_time = Time.now
+
+        result = ""
+        begin
+          @passed = nil
+          self.before_setup
+          self.setup
+          self.after_setup
+          self.run_test self.__name__
+          result = "." unless io?
+          time = Time.now - start_time
+          runner.record self.class, self.__name__, self._assertions, time, nil
+          @passed = true
+        rescue *PASSTHROUGH_EXCEPTIONS
+          raise
+        rescue Exception => e
+          @passed = Skip === e
+          time = Time.now - start_time
+          runner.record self.class, self.__name__, self._assertions, time, e
+          result = runner.puke self.class, self.__name__, e
+        ensure
+          %w{ before_teardown teardown after_teardown }.each do |hook|
+            begin
+              self.send hook
+            rescue *PASSTHROUGH_EXCEPTIONS
+              raise
+            rescue Exception => e
+              @passed = false
+              runner.record self.class, self.__name__, self._assertions, time, e
+              result = runner.puke self.class, self.__name__, e
+            end
+          end
+          trap 'INFO', 'DEFAULT' if runner.info_signal
+        end
+        result
+      end
+
+      alias :run_test :__send__
+
+      def initialize name # :nodoc:
+        @__name__ = name
+        @__io__ = nil
+        @passed = nil
+        @@current = self # FIX: make thread local
+      end
+
+      def self.current # :nodoc:
+        @@current # FIX: make thread local
+      end
+
+      ##
+      # Return the output IO object
+
+      def io
+        @__io__ = true
+        MiniTest::Unit.output
+      end
+
+      ##
+      # Have we hooked up the IO yet?
+
+      def io?
+        @__io__
+      end
+
+      def self.reset # :nodoc:
+        @@test_suites = {}
+      end
+
+      reset
+
+      ##
+      # Call this at the top of your tests when you absolutely
+      # positively need to have ordered tests. In doing so, you're
+      # admitting that you suck and your tests are weak.
+
+      def self.i_suck_and_my_tests_are_order_dependent!
+        class << self
+          undef_method :test_order if method_defined? :test_order
+          define_method :test_order do :alpha end
+        end
+      end
+
+      ##
+      # Make diffs for this TestCase use #pretty_inspect so that diff
+      # in assert_equal can be more details. NOTE: this is much slower
+      # than the regular inspect but much more usable for complex
+      # objects.
+
+      def self.make_my_diffs_pretty!
+        require 'pp'
+
+        define_method :mu_pp do |o|
+          o.pretty_inspect
+        end
+      end
+
+      def self.inherited klass # :nodoc:
+        @@test_suites[klass] = true
+        super
+      end
+
+      def self.test_order # :nodoc:
+        :random
+      end
+
+      def self.test_suites # :nodoc:
+        @@test_suites.keys.sort_by { |ts| ts.name.to_s }
+      end
+
+      def self.test_methods # :nodoc:
+        methods = public_instance_methods(true).grep(/^test/).map { |m| m.to_s }
+
+        case self.test_order
+        when :parallel
+          max = methods.size
+          ParallelEach.new methods.sort.sort_by { rand max }
+        when :random then
+          max = methods.size
+          methods.sort.sort_by { rand max }
+        when :alpha, :sorted then
+          methods.sort
+        else
+          raise "Unknown test_order: #{self.test_order.inspect}"
+        end
+      end
+
+      ##
+      # Returns true if the test passed.
+
+      def passed?
+        @passed
+      end
+
+      ##
+      # Runs before every test. Use this to set up before each test
+      # run.
+
+      def setup; end
+
+      ##
+      # Runs after every test. Use this to clean up after each test
+      # run.
+
+      def teardown; end
+
+      include MiniTest::Assertions
+    end # class TestCase
+  end # class Unit
+
+  Test = Unit::TestCase
+end # module MiniTest
+
+Minitest = MiniTest # :nodoc: because ugh... I typo this all the time