Before:
  Save g:ale_buffer_info, g:ale_enabled, b:ale_enabled

  function! TestCallback(buffer, output)
    return []
  endfunction

  call ale#linter#Define('foobar', {
  \ 'name': 'testlinter',
  \ 'callback': 'TestCallback',
  \ 'executable': 'echo',
  \ 'command': 'true',
  \})

  function GetLastMessage()
    redir => l:output
      silent mess
    redir END

    let l:lines = split(l:output, "\n")

    return empty(l:lines) ? '' : l:lines[-1]
  endfunction

  echomsg ''

After:
  Restore
  call ale#linter#Reset()
  delfunction TestCallback
  delfunction GetLastMessage

Given foobar (Some imaginary filetype):
  foo
  bar
  baz

Execute(Linting shouldn't happen when ALE is disabled globally):
  let g:ale_enabled = 0
  let g:ale_buffer_info = {}

  call ale#Queue(0)

  AssertEqual {}, g:ale_buffer_info

Execute(Linting shouldn't happen when ALE is disabled locally):
  let b:ale_enabled = 0
  let g:ale_buffer_info = {}

  call ale#Queue(0)

  AssertEqual {}, g:ale_buffer_info

Execute(Cursor warnings shouldn't be echoed when ALE is disabled globally):
  let g:ale_enabled = 0
  let g:ale_buffer_info = {
  \ bufnr('%'): {
  \   'loclist': [
  \     {
  \       'lnum': 2,
  \       'col': 10,
  \       'linter_name': 'testlinter',
  \       'type': 'W',
  \       'text': 'X'
  \     },
  \   ],
  \ },
  \}

  call cursor(2, 16)
  call ale#cursor#EchoCursorWarning()
  AssertEqual '', GetLastMessage()

Execute(Cursor warnings shouldn't be echoed when ALE is disabled locally):
  let b:ale_enabled = 0
  let g:ale_buffer_info = {
  \ bufnr('%'): {
  \   'loclist': [
  \     {
  \       'lnum': 2,
  \       'col': 10,
  \       'linter_name': 'testlinter',
  \       'type': 'W',
  \       'text': 'X'
  \     },
  \   ],
  \ },
  \}

  call cursor(2, 16)
  call ale#cursor#EchoCursorWarning()
  AssertEqual '', GetLastMessage()