---
 - hosts: all
   connection: local
   gather_facts: False
   vars:
     var_true: True
     var_false: False
     var_empty_str: "''"
     var_null: ~
 
   tasks:
   - action: command echo ping
     always_run: yes
 
   - action: command echo pong 1
 
   - action: command echo pong 2
     always_run: no
 
   - action: command echo pong 3
     always_run: 1 + 1
 
   - action: command echo pong 4
     always_run: "''"
 
   - action: command echo pong 5
     always_run: False
 
   - action: command echo pong 6
     always_run: True
 
   - action: command echo pong 7
     always_run: var_true
 
   - action: command echo pong 8
     always_run: var_false
 
   - action: command echo pong 9
     always_run: var_empty_str
 
   - action: command echo pong 10
     always_run: var_null
 
   # this will never run...
   - action: command echo pong 11
     always_run: yes
     when: no