Logging of JUnitSampler exceptions

[dfa1]

Description

Logging of any non-assert exception generated inside a test.

Motivation and Context

The main motivation is to speedup fixing of errors inside test methods. We have a big test suite that
is run using the JUnitSampler using this pattern:

private final Logger logger = LoggerFactory.getLogger(getClass());

@Test
public void testName() {
    try {
       // test body
    } catch (Exception ex) {
        logger.warn("caught exception", ex);
        throw ex;  
   }
}

With this change the code would be simpler:

@Test
public void testName() {
     // test body
}

How Has This Been Tested?

Still to be tested. Since we are using jmeter-maven-plugin, we need to install the JMeter core in the local maven repository. There is a quick way to do this using ant?

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.

[FSchumacher]

Thanks for your contribution.

[FSchumacher]

Some discussion about the performance impact of the log messages has taken place on the dev mailing list.

Would this patch be still useful for you, if we logged the messages at debug or info level?

[dfa1]

Thanks to you for accepting this change.

Naturally It would be still useful at info or debug level: the important point imho is to see the complete stacktrace when a test throws an exception.