Before:
  Save g:ale_buffer_info

  let g:ale_buffer_info = {}

  call ale#linter#PreventLoading('testft')
  call ale#linter#Define('testft', {
  \ 'name': 'testlinter',
  \ 'callback': {-> []},
  \ 'executable': has('win32') ? 'cmd' : 'true',
  \ 'command': 'sleep 9001',
  \})

After:
  Restore

  call ale#linter#Reset()

Given testft (An empty file):
Execute(ALELintStop should stop ALE from linting):
  ALELint

  Assert ale#engine#IsCheckingBuffer(bufnr('')), 'ALE did not start checking the buffer'

  ALELintStop

  Assert !ale#engine#IsCheckingBuffer(bufnr('')), 'ALELintStop didn''t work'