There are 3 ways to run a language test:
Overall Harness
make languages-test
or
cd languages && make test or
cd languages && make test
Per Language Harness
For well behaved languages you can do something like:
cd languages/tcl && make test
Run a single test for more detailed output.
e.g., cd languages/tcl && t/joe_test.t
cd languages/tcl && t/joe_test.t
There is too much overlap with ../t/harness.
Will "Coke" Coleda Jerome Quelin
We are assuming that we are running out of parrot/languages; we are being called by languages/Makefile with an explicit perl. All languages have a Makefile with a "test" target, and any prereqs required by that test have already been built.
To install Ruby, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Ruby
CPAN shell
perl -MCPAN -e shell install Ruby
For more information on module installation, please visit the detailed CPAN module installation guide.