on_failure

If step result is falsy value then defined option value will be performed

Allowed values	Behavior
:PASS	performs next success track step
:FAIL	performs next failure track step
:finish_him	stops action execution
symbol of the next step	performs defined step, no matter on which track it is.

# ...
logic do
  step :step_one, on_failure: :PASS # will perform step_two
  step :step_two
  fail :fail_one
end

def step_one
  false
end
# ...

# ...
logic do
  step :step_one, on_failure: :FAIL # will perform fail_one
  step :step_two
  fail :fail_one
end

def step_one
  false
end
# ...

# ...
logic do
  step :step_one, on_failure: :finish_him # will stop action execution
  step :step_two
  fail :fail_one
end

def step_one
  false
end
# ...

# ...
logic do
  step :step_one, on_failure: :fail_two # will perform fail_two
  step :step_two
  fail :fail_one
  fail :fail_two
end

def step_one
  false
end
# ...