/etc/willtest:
  file.managed:
    - source: salt://sensu/files/sensu-api.monit

sensu-all-grain:
  module.run:
    - name: grains.append
    - key: SENSU_CHECKS
    - val: all
    - listen_in:
      - file: /etc/willtest


Output

local:
----------
          ID: /etc/willtest
    Function: file.managed
      Result: True
     Comment: File /etc/willtest updated
     Started: 13:03:29.325420
    Duration: 162.881 ms
     Changes:
              ----------
              diff:
                  New file
              mode:
                  0644
----------
          ID: sensu-all-grain
    Function: module.run
        Name: grains.append
      Result: True
     Comment: Module function grains.append executed
     Started: 13:03:29.488534
    Duration: 0.7 ms
     Changes:
              ----------
              ret:
                  The val all was already in the list SENSU_CHECKS
----------
          ID: listener_/etc/willtest
    Function: file.mod_watch
        Name: /etc/willtest
      Result: False
     Comment: State 'file.mod_watch' found in SLS 'sensu.test' is unavailable
     Started:
    Duration:
     Changes:

Summary
------------
Succeeded: 2 (changed=2)
Failed:    1
------------