TestNG

1

• TestNG
• Nest generation Java Testing

Bojana Kolbah Siyuan He
Licensed under a Creative Commons Attribution 3.0
License
2
Outline
1. Introduction and overview
2. Installation
3. Demo and comparison between TestNG and
JUnit 4
4. TestNG open source community
5. References and questions
3
TestNG overview

• Author Cédric Beust
• http//testng.org
• Started out in 2004 of frustration with some
  Junit 3.8 deficiencies
• JUnit set-up and tear-down are run for each test
• JUnit is intended for unit testing

4
TestNG overview

• Inspired by JUnit but introduces some new
  functionalities that make it more powerful and
  easier to use
• Benefits of using TestNG increase for testing
  that goes over and above unit testing (e.g.
  integration testing, system testing)
• Licensed under Apache license

5
Installation Guidelines

• Generic package (Command line, Ant, Maven, IDEA)
• Download the package
• Update classpath
• Eclipse plug-in
• Add site http//beust.com/eclipse to Software
  Updates GUI in Eclipse and run an update
• Click on Install, accept the license and reboot
  Eclipse
• Or download directly into the plug-in directory

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Comparison

• JUnit 4
• Test Configuration is less and no XML file
  configuration at all.Less configuration makes it
  more easy and really fast to create
• Similar in JUnit, but less powerful._at_After/Before
  works in methods and _at_After/BeforeClass will
  work with classes.

• TestNG
• Flexible test configuration in an external XML
  file. External configuration gives more
  flexibility.
• flexible fixture _at_After/BeforeSuite._at_After/Befor
  eGroup._at_After/BeforeClass._at_After/BeforeMethod

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Comparison(Cont.)

• TestNG
• Group testing. Here we can create Groups.
• Include, exclude, group at different level,
  partial groupetc.
• _at_ParametersSupport for parameters using
• _at_DataProviderSupport for data-driven testing
  .(code example?)

• JUnit 4
• _at_RunWith(Suite.class) Less flexible.
• No such type of annotations
• Integrate with EasyMock for Mock object testing

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Comparison (Cont.)

• TestNG
• Option to run failed tests only/ last test only
  in the IDE(generate a new test suite in
  testng-failed.xml)
• Using ExpectedExceptions in _at_Test Annotation we
  can expect some exceptions in the test methods
  and thus the method will be success.

• JUnit 4
• We have to select and run each methods which are
  failed
• We can use (expected Exception.class) in the
  _at_Test annotation

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Comparison(Cont. )

• TestNG
• Allows distribution of tests on slave machines.
• Parallel running
• Embeds BeanShell (scripting)  for further
  flexibility.
• Dependent Methods

• JUnit 4
• N/A
• Supported by plug-ins. ( e.g. parallel-junit )
• JUnit dont have this feature at all.
• N/Abasic princeple of unit testing is that test
  methods should be independent of each other

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Comparison (cont.)

• TestNG
• Extension/Integrating with other tools (Spring,
  Maven, Tapestry, Stripes, Groovy, JMockit, Using
  JUnit Extensions!!!)
• Logging support

• JUnit4
• Cant defeat JUnit in this matter. It has a lot of
  supporting tools and plugins.
• Not logging support in JUnit.

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Comparison(Cont. 5)

• JUnit 4
• _at_Ignore annotation is there for ignoring a test
  method.

• TestNG
• No annotation like _at_Ignore. But we can ignore
  through exclusion of groups.

• TestNG Beats JUnit 4.

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TestNG in Open Source community

• TestNG webpage contains documentation and
  articles of interest
• There are two on-line forums and a email
  mailing-list on Google Groups
• No need for training or professional services
• Eight developers are credited as main
  contributors and another 11 as ideas and
  suggestions suppliers
• Beust wrote a book Next Generation Java Testing
• Book Java Power Tools has a chapter on testNG
• There is no obvious invitation for contributors

13

• don't let the tool(JUnit) you use restrict your
  creativity
• Lets Try TestNG
• http//www.youtube.com/watch?vTtcEpryRy44
• http//www.artima.com/lejava/articles/testng.html

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References

• 1 TestNG web page http//testng.org/doc/index.ht
  ml
• 2In pursuit of code quality JUnit 4 vs.TestNG
  http//www-128.ibm.com/developerworks/java/library
  /j-cq08296/index.html
• 3 Beyond JUnitIntroducingTestNG,
  http//www.theserverside.com/tt/articles/content/J
  IApresentations/Beust.pdf
• 4 TestNG 5.6 and Junit 4.4 which framework
  you will choose for unit testing?
  http//lijinjoseji.wordpress.com/2008/02/29/testng
  -56-and-junit-44-which-framework-you-will-choose-f
  or-unit-testing/