Run Single Test in Maven

If you guys read the reason I started this blog, you'll recall  that it was just to summarize stupid stuff one always forget when coding.
And so here is one of them, how to run just a single test from the command line with maven.
Well let me just C&P the data from the Apache Maven site

To run this through Maven, set the test property to a specific test case.

mvn -Dtest=TestCircle test

The value for the test parameter is the name of the test class (without the extension; we'll strip off the extension if you accidentally provide one).

You may also use patterns to run a number of tests:

mvn -Dtest=TestCi*le test

And you may use multiple names/patterns, separated by commas:

mvn -Dtest=TestSquare,TestCi*le test

I know I know this has not actual merit but hey think of this blog as place were you can find this kind of things because, except from one or two original things this is what you'll find.

Maven offline

Right so this one time at band camp.... (really don't get it??? American Pie 1 OMG!!!)

Ok moving on, I have this maven project which has like ALL THE DEPENDENCIES IN THE WORLD.

And every time I build it it start downloading all of them. Problem is 99.9999999% of the time they don't change.

How to avoid that overhead?

mvn -o

The -o modifier tells maven not to go look for the dependencies and to use the ones it already has.

Now we're on the subject I found this cool page that list all the modifiers. Nothing you could't do with a  mvn --help, never the less I need to keep posting you know.

So here it is the list of modifiers:

usage: mvn [options] [<goal(s)>] [<phase(s)>]

Options:
 -q,--quiet                        Quiet output - only show errors
 -C,--strict-checksums             Fail the build if checksums don't match
 -c,--lax-checksums                Warn if checksums don't match
 -P,--activate-profiles            Comma-delimited list of profiles to
                                   activate
 -amd,--also-make-dependents       If project list is specified, also
                                   build projects that depend on projects on the list
 -ff,--fail-fast                   Stop at first failure in reactorized
                                   builds
 -rf,--resume-from                 Resume reactor from specified project
 -fae,--fail-at-end                Only fail the build afterwards; allow
                                   all non-impacted builds to continue
 -B,--batch-mode                   Run in non-interactive (batch) mode
 -am,--also-make                   If project list is specified, also
                                   build projects required by the list
 -fn,--fail-never                  NEVER fail the build, regardless of
                                   project result
 -emp,--encrypt-master-password    Encrypt master security password
 -ep,--encrypt-password            Encrypt server password
 -up,--update-plugins              Synonym for cpu
 -N,--non-recursive                Do not recurse into sub-projects
 -npr,--no-plugin-registry         Don't use ~/.m2/plugin-registry.xml for
                                   plugin versions
 -gs,--global-settings             Alternate path for the global settings
                                   file
 -U,--update-snapshots             Forces a check for updated releases and
                                   snapshots on remote repositories
 -cpu,--check-plugin-updates       Force upToDate check for any relevant
                                   registered plugins
 -npu,--no-plugin-updates          Suppress upToDate check for any
                                   relevant registered plugins
 -V,--show-version                 Display version information WITHOUT
                                   stopping build
 -D,--define                       Define a system property
 -X,--debug                        Produce execution debug output
 -e,--errors                       Produce execution error messages
 -f,--file                         Force the use of an alternate POM file.
 -h,--help                         Display help information
 -o,--offline                      Work offline
 -pl,--projects                    Build specified reactor projects
                                   instead of all projects
 -r,--reactor                      Dynamically build reactor from
                                   subdirectories
 -s,--settings                     Alternate path for the user settings
                                   file
 -v,--version                      Display version information