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From "Alexei Zakharov" <alexei.zakha...@gmail.com>
Subject [testing] metadata approach
Date Fri, 28 Jul 2006 13:31:51 GMT

I have created this new thread as a single place for discussions
started in "Re: [testing] Peace" and "[classlib] Testing conventions –
a proposal" threads.

What did we have in the previous threads?
* Test classification proposed by Vladimir
* Test classification and group names proposed by George
* Solution for Ant and TestNG scripting issues (still being discussed)

Since a lot of people are asking about TestNG and wanting TestNG I
decide to put some effort and take a closer look at this piece of
software. Thus during the last few days I was playing with TestNG - I
tried to run different kind of tests with it, to perform various
workloads, generate reports in different ways and etc. The purpose of
all this activity was to try TestNG in a real work, understand is
TestNG really worth our credits and how expensive can be moving to
TestNG from our currently implemented testing infrastructure. Now I
have some thoughts and facts I'd like to share with the community.
I've put it in the form of list for convenience.

* TestNG works ok in normal conditions, no visible bugs
* It is possible to define and use various (possibly intersecting)
test groups with TestNG
* TestNG-style metadata is more convenient than JUnit test suites (now
I agree with this statement). IMHO this is the main TestNG benefit.
* It is possible to run TestNG from command line
* There is also the special ant task for running TestNG
* Not everything can be configured with the ant task or command-line
params, sometimes extra test suite definition file "testng.xml" is
* It is possible to run jUnit tests with TestNG ("testng.xml" is
needed in this case)
* It is possible to run junit tests we currently have in Harmony with
TestNG without any problems and modifications of the source code.
However, we probably should write some number of TestNG test suite
definition files "testng.xml" to be able to run all our junit tests (I
have tried tests for bean module and some tests for luni)
* We can mix jUnit tests and TestNG tests in the single test suite
configuration – i.e. single testng.xml file. We can add TestNG
metadata to some test classes and leave other test classes untouched
* TestNG generates HTML reports in its own style, not a very convenient one IMHO
* It is also possible to generate JUnitReports from the output
generated by TestNG
* Such reports will have a little bit different structure since TestNG
doesn't provider any information about enclosing type for test
methods. Names for tests (replacement for JUnit "test classes") and
test suites should be externally configured in "testng.xml"
* TestNG for Java 5 doesn't work on Harmony because some necessary
classes from java.util.concurrent package are missing and it seems
that jsr14 target (we are currently using) doesn't support annotations
* TestNG for Java 1.4 (javadoc version) currently works on Harmony
* I have half-way done script that converts TestNG 1.4 metadata
(javadoc) tests to TestNG 1.5 (5.0 annotations) tests.

The question I'd like to raise now is – aren't we ready for TestNG
right now? For example, we could replace our harness from jUnit to
TestNG and lazily start converting of some failing and platform
dependent tests to javadoc version of TestNG. The rest of the tests
will remain jUnit in fact. And when our VM will be ready to handle
annotations we can convert all our TestNG 1.4 tests to TestNG 1.5. I
understand that this idea may seem to be too early. But anyway we will
need to change things some day since many people are unhappy with the
current testing infrastructure (me for example).

Thought? Suggestions? Opposite opinions?

With Best Regards,

Alexei Zakharov,
Intel Middleware Product Division

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