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NEAL FORD software architect / meme wrangler

ThoughtWorks

nford@thoughtworks.com 3003 Summit Boulevard, Atlanta, GA 30319

www.nealford.com

www.thoughtworks.com

blog: memeagora.blogspot.com

twitter: neal4d

unit testing that sucks less: small things that make a

big difference

housekeepingask questions anytime

download slides from nealford.com

download samples from github.com/nealford

groovymockrunner

jruby mockingjtestr & rspec

easyb

jesterinfinitesthamcrest

what i cover

http://code.google.com/p/hamcrest/

the test target

the old way

thou shalt assert equals expected and f.factors

included in junit 4.x, addable for junit 3.x

fluent interface matchers for xUnit

syntactic sugar for standard matchers

make assertions suck less

not a testing framework

hamcrest matchers

hamcrest: equalTo

hamcrest: is(equalTo...

hamcrest: is

hamcrest: anything

hamcrest: anyOf

Sucks

Less!

http://code.google.com/p/infinitest/

it picks tests intelligently

continuous test runner for junit tests

whenever you change a class, infinitest runs tests for you

plug-in for eclipse or intellij

compiler-like verification for unit tests

configuring intellij

infinitest in intellij

select the "Available Software" tab, and hit "Add Site..."

copy the update url to your clipboard: http://www.infinitest.org/eclipse-update

In eclipse, choose the Help->Software Updates menu item

choose the appropriate version of Infinitest by checking the box to the left, & hit "Install"

paste the update URL into the "Location" field, and hit "OK"

configuring eclipse

infinitest in eclipse

Sucks

Less!

http://jester.sourceforge.net/

makes changes to your tests

test permutation framework

jester:

hopes the tests fail

rebuilds the code

BUILD_COMMAND is the command to build your project and run tests

only run jester on a copy of your files!

java jester.TestTester BUILD_COMMAND SOURCE_DIRECTORY

produces an xml report

SOURCE_DIRECTORY is the source directory for your tests

running jester

python makeWebView.py

jester produces an xml output file

includes a python script to output each changed file to html

shows what was changed

produces a friendly report

reporting results

poor tests

improved code

Sucks

Less!

http://mockrunner.sourceforge.net/

includes a JDBC, a JMS and a JCA test framework

lightweight framework for unit testing applications in the J2EE environment

supports servlets, filters, tag classes and Struts actions and forms

write very sophisticated unit-tests for J2EE based applications without any overhead

extends junit and simulates the necessary behavior without calling the real infrastructure

Mockrunner

testing struts actions

extending BasicActionTestCaseAdapter

delegator

testing servlets

testing HTML using JDOM

testing jdbc

testing transactions

mocking JMS

creating the fixture

the test

stubbing via inheritance

mockrunner is fast!

Sucks

Less!

http://unitils.org/

mock objects

open source set of utility classes to make typical java scenarios easier to test

offers support to hibernate, spring, JPA

spring integration

persistence layer testing support

assertion utilities

asserting user1 == user2

testing identityequals

method in User

what is tested?

more comprehensive

reflection assertions

loops over all fields in both objects and compares their values using reflection

lenient assertions

dbUnit supportdbUnit files to be

loaded for this test

dbUnit support

this data will be loaded prior to test run

firstname == null

hibernate support

injection of Spring beans in unit tests

sometimes useful to have spring around during testing

management of ApplicationContext configuration

reference the Unitils DataSource in Spring configuration

make use of a hibernate SessionFactory configured in Spring

spring support

spring support

ApplicationContext

injection

mocksauto creation

of mocks

expectations

verification

Sucks

Less!

http://code.google.com/p/spock/

nicely detailed error messages

testing & specification framework for Java & Groovy

highly expressive specification language

compatible with junit test runner

setup - stimulus - response - cleanup

spock

spock test specification

junit test runner interface

test classtest

stimulus

response

blocks & outcomes

setup

simple statements

of fact

pretty failures!

junit vs. spock

Sucks

Less!

tdd private methods?

solution #1:

make them all public(or package) scope

solution #2:

use reflection

reflection helpers

groovy

reflection

dirty secret:private is ignored!

technically, a bug......no great hurry to fix it (insanely useful!)

mocking

mocking in

FactorsFinder class harvests factors

Classifier uses external factors

changes:

Finder

FactorsFinder

Finder

FactorsFinder

Classifier

jmock

Sucks

!

mocking with

java-like syntax

factors :factors :

factors()

Finder

idiomatic

Sucks

Less!

http://jtestr.codehaus.org/

testing java with jruby

the java part

testing fill()

jmock

mocha

Sucks

Less!

what does it take???

jmock vs mocha loc

0

4,000

8,000

12,000

16,000

20,000

17,152

2,245JMock

mocha

jmock has 7.5 times as many lines of code

jmock vs mocha cc

0

600

1,200

1,800

2,400

3,000

2,349

323JMock

mocha

jmock has 7.2 times the complexity of mocha

...that execute

behavior driven development framework

allows you to create readable specifications...

inspiration for tons of similar frameworks

inspired by JBehave

rspec

specification

pretty results

Sucks

Less!

ThoughtWorks

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NEAL FORD software architect / meme wrangler

ThoughtWorks

nford@thoughtworks.com 3003 Summit Boulevard, Atlanta, GA 30319

www.nealford.com

www.thoughtworks.com

blog: memeagora.blogspot.com

twitter: neal4d