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Declare War On Everything With Chaser
Declare War On Everything With Chaser
Declare War On Everything With Chaser
Declare War On Everything With Chaser
Declare War On Everything With Chaser
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Declare War On Everything With Chaser

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Introducing chaser, a lightweight mutation tester for any flavor of ruby

Introducing chaser, a lightweight mutation tester for any flavor of ruby

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  • 1. Declare war on everything with Chaser <ul><li>Andrew Grimm, University of New South Wales </li></ul>Lightweight mutation testing in any flavor of ruby
  • 2. Mutation testing <ul><li>Evaluates thoroughness of unit tests
  • 3. Changes code being unit tested
  • 4. If changes don't cause test failures, it isn't totally thorough
  • 5. Main ruby mutation tester is Heckle
  • 6. Chaser is a new lightweight alternative </li></ul>
  • 7. Chaser != Bradbury <ul><li>Chaser is about a different set of mutations
  • 8. Bradbury about making the unit tests faster </li></ul>!=
  • 9. Reasons for creating Chaser <ul><li>Heckle currently relies on ParseTree
  • 10. ParseTree relies on MRI Ruby 1.8 and doesn't work under Windows </li></ul>
  • 11. 100% pure ruby <ul><li>Yay: </li><ul><li>Chaser uses plain old metaprogramming
  • 12. Works under ruby 1.9, Windows, JRuby </li></ul><li>Boo: </li><ul><li>Doesn't mutate every piece of code in a method
  • 13. Currently only modifies the methods' return values </li></ul></ul>

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