Travis-CI test for MongoDB connectivity before script

travis-ci-test-mongo-connectivity.yml

# This script will test for MongoDB connectivity.
# If MongoDB is available then it continues else it tries X times then fails.
#
# Use: Add this to your `before_script` option

before_script:
    - |
      echo "Testing MongoDB connection...";tries=4;
      i=0;
      while [ $i -lt $tries ]; do fail=$(mongo --eval db 2>&1 >/dev/null | grep "connect failed");
        if [ "$fail" ] && [ $[ $i+1 ] -eq $tries ] ; then echo "Error: Could not connect to mongodb"; exit 1;
        elif [ "$fail" ]; then sleep 3; i=$[ $i+1 ];
        else echo "OK"; i=$tries; fi;
      done