Automated Testing

Automated Testing John Paulett jhcore.com 4.17.2009

testing sucks

buggy code sucks more

being an example on thedailywtf.com sucks the most

types of testing

types of testing unit

functional types of testing unit

security usability scaling load regression functional types of testing smoke accessibility requirement unit acceptance touch recovery

security usability scaling load regression functional types of testing smoke and more ... accessibility requirement unit acceptance touch recovery

unit testing

smallest testable part method / function level assertions

junit test case import junit.framework.TestCase; public class TestMath extends TestCase { public void testSquare() { assertEquals(16, Math.square(4)); } }

test drive development public class Math { public static int square(int x) { return x; } }

failure

fix the bug public class Math { public static int square(int x) { return x * x; } }

forces better design separate presentation from business logic from data access! “mock” out what your not testing fake data access class when testing business logic

every language has a unit testing framework even php

regression testing

know when things break

a test for every build (and a build for every commit)

automate your build

hudson hudson.dev.java.net

functional testing

selenium seleniumhq.org

load testing

jmeter jakarta.apache.org/jmeter/

requirements testing

fitnesse fitnesse.org

test coverage

how much code is tested eclemma.org

wuss excuses

wuss: i'm the only one on the project

winner: i'll be ready for when more people join winner: i want my code to work

wuss: just for my research, not production code

winner: i don't want to look like a fool publishing buggy results

wuss: i test it by using it

winner: i realize i never even get close to testing all of it after every change

wuss: it is already 1M LOC, with no tests, it's too late

winner: i'll add a couple tests when i fix a bug

key steps to start 1) unit test on all new code ● when you find a bug in existing code ● work towards 100% branch coverage ● 2) automate your build, test every commit

est finis slides at jhcore.com write at least 1 unit test next time you code get your test on!

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Automated Testing

by John Paulett

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