m: a better Ruby Test::Unit runner

Run tests by line number in Test::Unit, and more!

Presented at WNYRuby on April 11th, 2012.

Transcript

1. m
   a better
   test-unit
   runner
   @qrush
   

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2. i’m @qrush
   

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3. @
   i live here
   

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4. c
   i work at 37signals
   

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5. stands for
   metal
   m
   

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7. runs tests by
   line number
   m
   

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8. $ 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 wrote:
   

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9. $ 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
   run one test:
   

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10. $ 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
    wrong line:
    

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11. $ 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
    run it all:
    

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12. some
    facts
    m
    

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13. works with test-unit,
    rails, mini-test
    1.
    uses rocco for literate
    documentation
    2.
    four months of daily use
    3.
    

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14. how does it
    work
    m
    

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15. programming is not magic
    

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16. figure out where test
    methods are
    1.
    match what line you chose
    with tests we know about
    2.
    run that test!
    3.
    

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17. __/\\\\____________/\\\\_
    _\/\\\\\\________/\\\\\\_
    _\/\\\//\\\____/\\\//\\\_
    _\/\\\\///\\\/\\\/_\/\\\_
    _\/\\\__\///\\\/___\/\\\_
    _\/\\\____\///_____\/\\\_
    _\/\\\_____________\/\\\_
    _\/\\\_____________\/\\\_
    _\///______________\///__
    gem install m
    http://quaran.to/m
    https://github.com/qrush/m
    

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