Lessons Learned in Unit Testing

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LESSONS LEARNED IN UNIT TESTING Alison Barrett WordCamp San Francisco 2013

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10 != 1

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Write better code.

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I want to inspire you.

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Currently: Testing by debugging

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We can do better.

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Automation saves time Debugging is easier Code is future-proof Architecture is modular Tests double as documentation WHY?

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AUTOMATION photo by pasukaru76

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Good, Fast, Cheap. Pick two.

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Writing unit tests: Good

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Running unit tests: Good, Fast, Cheap

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DEBUGGING photo by pasukaru76

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......F..F...F..FFF.......................... ran 45 tests these 6 failed

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test_matches_browser_test MarkupA8CLinkTest 6) :: Failed asserting that 'test:/alisothegeek/?rev=3389asdf' does not match PCRE pattern "%(?

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FUTURE-PROOF photo by dunechaser

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Refactoring

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MODULARITY photo by georgivar

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Unit testing not entire class testing not contents-of-a-ﬁle testing

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DOCUMENTATION photo by ercwttmn

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WRAPPING UP photo by .guin

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Write better code.

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@alisothegeek alison.barre.tt QUESTIONS? All photos licensed under the Creative Commons Attribution license.