With the new "gogland" IDE there is no support(yet) for running tests on each save.
However, if you run ubuntu, you could use the following script to continously run the tests in the background and get notified when you a) break the tests b) fix the tests.
download the script:wget https://gist.githubusercontent.com/nilsmagnus/8d5a431f19760ddcaa5d8c12d22b13f9/raw/c16fba1f9be83c395a3e4e493c72df8c715fe896/continous_gotest_notify.shexecute the script:
sh continous_gotest_notify.sh