After a git commit and push, the next command you might run is cap deploy. But how about running your tests?
If you don’t want to run any extra commands beyond git commit/push and cap deploy, you’ll want to look having your Capistrano script run your Rake tests locally too.
The Capistrano command “run” execute stuff remotely on your target deployed server, but since the deploy.rb Capistrano script is just a regular ruby script, you can just use “system()” or ““” (backticks) to execute commands locally.
Here’s an example:
# acceptance test
task :run_acceptance_test do
system("rake test:acceptance") # can use backticks `` as a shorthand also
exit if $? != 0
end
before "deploy:set_comment", :run_acceptance_test
Let me explain.
before "deploy:set_comment", :run_acceptance_test
would tell Capistrano to run your custom named task, in the case here, it’s “:run_acceptance_test”.
exit if $? != 0
Would check the error code of the previously run system command and if the error code (defined by $?) is not 0 (zero), it’ll cause the whole Capistrano script to exit.
So, if rake test:acceptance fails, the Capistrano script will exit and deployment will not happen at all.