How to log simpletest test results into files using drush test-run?

Question

I would like to save simpletest test results into a log file. What bash commands should I use ?

I tried this command (example) but nothing is saved into /var/tmp folder :

sudo -u apache drush test-run Comment --xml /var/tmp

I use Linux , Drupal 7.12, Drush 4.5

Answer 1

I don't use drush test-run, but Drush options are always in the form --xml=/var/tmp.

c.f. http://drupal.org/node/1416198

From drush help test-run

 --xml      Output verbose test results to a     
            specified directory using the JUnit  
            test reporting format. Useful for    
            integrating with Jenkins.  

Try:

sudo -u apache drush test-run Comment --all --xml=/var/tmp

Answer 2

Try something like this:

sudo -u apache drush test-run > /var/tmp/whatever.txt

Answer 3

What worked for me finally was:

sudo -u apache drush test-run Comment --xml=/var/tmp >/var/tmp/test.log 2>/var/tmp/test.err

Thanks for help from hiphip and greg_1_anderson :)