Execute(Vim8 Process ID parsing should work):
  AssertEqual 123, ale#job#ParseVim8ProcessID('process 123 run')
  AssertEqual 347, ale#job#ParseVim8ProcessID('process 347 failed')
  AssertEqual 789, ale#job#ParseVim8ProcessID('process 789 dead')
  AssertEqual 0, ale#job#ParseVim8ProcessID('no process')