M.RB

m stands for metal, a better test/unit test runner that can run tests by line number.

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INSTALL

Install via:

$ gem install m

If you’re using Bundler, you’ll need to include it in your Gemfile. Toss it into the test group:

group :test do
  gem 'm', '~> 1.3.1'
end

Developing a RubyGem? Add m as a development dependency.

Gem::Specification.new do |gem|
  # ...
  gem.add_development_dependency "m", "~> 1.3.1"
end

m works on Ruby 1.9+ only.

USAGE

Basically, I was sick of using the -n flag to grab one test to run. Instead, I prefer how RSpec’s test runner allows tests to be run by line number.

Given this file:

$ cat -n test/example_test.rb
 1  require 'test/unit'
 2
 3  class ExampleTest < Test::Unit::TestCase
 4    def test_apple
 5      assert_equal 1, 1
 6    end
 7
 8    def test_banana
 9      assert_equal 1, 1
10    end
11  end

You can run a test by line number, using format m TEST_FILE:LINE_NUMBER_OF_TEST:

$ m test/example_test.rb:4
Run options: -n /test_apple/

# Running tests:

.

Finished tests in 0.000525s, 1904.7619 tests/s, 1904.7619 assertions/s.

1 tests, 1 assertions, 0 failures, 0 errors, 0 skips

Hit the wrong line number? No problem, m helps you out:

$ m test/example_test.rb:2
No tests found on line 2. Valid tests to run:

 test_apple: m test/examples/test_unit_example_test.rb:4
test_banana: m test/examples/test_unit_example_test.rb:8

Want to run the whole test? Just leave off the line number.

$ m test/example_test.rb
Run options:

# Running tests:

..

Finished tests in 0.001293s, 1546.7904 tests/s, 3093.5808 assertions/s.

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

SUPPORT

m works with a few Ruby test frameworks:

• Test::Unit
• ActiveSupport::TestCase
• MiniTest::Unit::TestCase

LICENSE

This gem is MIT licensed, please see LICENSE for more information.