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Before:
  function! CheckAutocmd(group)
    call ale#events#Init()

    redir => l:output
      execute 'silent! autocmd ' . a:group
    redir END

    let l:matches = []
    let l:header = ''
    " Some event names have aliases, and NeoVim and Vim produce
    " different output. The names are remapped to fix this.
    let l:event_name_corrections = {
    \ 'BufWrite': 'BufWritePre',
    \ 'BufRead': 'BufReadPost',
    \}

    " autocmd commands are split across two lines in output, so we
    " must merge the lines back into one simple line.
    for l:line in split(l:output, "\n")
      if l:line =~# '^ALE' && split(l:line)[0] ==# a:group
        let l:header = split(l:line)[1]
        let l:header = get(l:event_name_corrections, l:header, l:header)
      elseif !empty(l:header)
        " There's an extra line for buffer events, and we should only look
        " for the one matching the current buffer.
        if l:line =~# '<buffer=' . bufnr('') . '>'
          let l:header .= ' <buffer>'
        else
          call add(l:matches, join(split(l:header . l:line)))
          let l:header = ''
        endif
      endif
    endfor

    call sort(l:matches)

    return l:matches
  endfunction

  Save g:ale_enabled
  Save g:ale_lint_on_text_changed
  Save g:ale_lint_on_insert_leave
  Save g:ale_pattern_options_enabled
  Save g:ale_lint_on_enter
  Save g:ale_lint_on_filetype_changed
  Save g:ale_lint_on_save
  Save g:ale_echo_cursor
  Save g:ale_fix_on_save
  Save g:ale_completion_enabled

After:
  delfunction CheckAutocmd
  Restore

  if g:ale_completion_enabled
    call ale#completion#Enable()
  else
    call ale#completion#Disable()
  endif

  call ale#events#Init()

Execute (g:ale_lint_on_text_changed = 0 should bind no events):
  let g:ale_lint_on_text_changed = 0

  AssertEqual [], CheckAutocmd('ALERunOnTextChangedGroup')

Execute (g:ale_lint_on_text_changed = 1 bind both events):
  let g:ale_lint_on_text_changed = 1

  AssertEqual [
  \ 'TextChanged * call ale#Queue(g:ale_lint_delay)',
  \ 'TextChangedI * call ale#Queue(g:ale_lint_delay)'
  \], CheckAutocmd('ALERunOnTextChangedGroup')

Execute (g:ale_lint_on_text_changed = 'always' should bind both events):
  let g:ale_lint_on_text_changed = 'always'

  AssertEqual [
  \ 'TextChanged * call ale#Queue(g:ale_lint_delay)',
  \ 'TextChangedI * call ale#Queue(g:ale_lint_delay)'
  \], CheckAutocmd('ALERunOnTextChangedGroup')

Execute (g:ale_lint_on_text_changed = 'normal' should bind only TextChanged):
  let g:ale_lint_on_text_changed = 'normal'

  AssertEqual [
  \ 'TextChanged * call ale#Queue(g:ale_lint_delay)',
  \], CheckAutocmd('ALERunOnTextChangedGroup')

Execute (g:ale_lint_on_text_changed = 'insert' should bind only TextChangedI):
  let g:ale_lint_on_text_changed = 'insert'

  AssertEqual [
  \ 'TextChangedI * call ale#Queue(g:ale_lint_delay)',
  \], CheckAutocmd('ALERunOnTextChangedGroup')

Execute (g:ale_lint_on_insert_leave = 1 should bind InsertLeave):
  let g:ale_lint_on_insert_leave = 1

  AssertEqual [
  \ 'InsertLeave * call ale#Queue(0)',
  \], CheckAutocmd('ALERunOnInsertLeave')

Execute (g:ale_lint_on_insert_leave = 0 should bind no events):
  let g:ale_lint_on_insert_leave = 0

  AssertEqual [], CheckAutocmd('ALERunOnInsertLeave')

Execute (g:ale_pattern_options_enabled = 1 should bind BufReadPost and BufEnter):
  let g:ale_pattern_options_enabled = 1

  AssertEqual [
  \ 'BufEnter * call ale#pattern_options#SetOptions(str2nr(expand(''<abuf>'')))',
  \ 'BufReadPost * call ale#pattern_options#SetOptions(str2nr(expand(''<abuf>'')))',
  \], CheckAutocmd('ALEPatternOptionsGroup')

Execute (g:ale_pattern_options_enabled = 0 should still bind events):
  let g:ale_pattern_options_enabled = 0

  AssertEqual [
  \ 'BufEnter * call ale#pattern_options#SetOptions(str2nr(expand(''<abuf>'')))',
  \ 'BufReadPost * call ale#pattern_options#SetOptions(str2nr(expand(''<abuf>'')))',
  \], CheckAutocmd('ALEPatternOptionsGroup')

Execute (g:ale_enabled = 0 should still bind pattern events):
  let g:ale_enabled = 0

  AssertEqual [
  \ 'BufEnter * call ale#pattern_options#SetOptions(str2nr(expand(''<abuf>'')))',
  \ 'BufReadPost * call ale#pattern_options#SetOptions(str2nr(expand(''<abuf>'')))',
  \], CheckAutocmd('ALEPatternOptionsGroup')

Execute (g:ale_lint_on_enter = 0 should bind only the BufEnter event):
  let g:ale_lint_on_enter = 0

  AssertEqual
  \ ['BufEnter * call ale#events#EnterEvent(str2nr(expand(''<abuf>'')))'],
  \ CheckAutocmd('ALERunOnEnterGroup')

Execute (g:ale_lint_on_enter = 1 should bind the required events):
  let g:ale_lint_on_enter = 1

  AssertEqual [
  \ 'BufEnter * call ale#events#EnterEvent(str2nr(expand(''<abuf>'')))',
  \ 'BufReadPost * call ale#Queue(0, ''lint_file'', str2nr(expand(''<abuf>'')))',
  \ 'BufWinEnter * call ale#Queue(0, ''lint_file'', str2nr(expand(''<abuf>'')))',
  \ 'FileChangedShellPost * call ale#events#FileChangedEvent(str2nr(expand(''<abuf>'')))',
  \], CheckAutocmd('ALERunOnEnterGroup')

Execute (g:ale_lint_on_filetype_changed = 0 should bind no events):
  let g:ale_lint_on_filetype_changed = 0

  AssertEqual [], CheckAutocmd('ALERunOnFiletypeChangeGroup')

Execute (g:ale_lint_on_filetype_changed = 1 should bind the FileType event):
  let g:ale_lint_on_filetype_changed = 1

  AssertEqual
  \ [
  \   'FileType * call ale#events#FileTypeEvent( '
  \     . 'str2nr(expand(''<abuf>'')), '
  \     . 'expand(''<amatch>'')'
  \     . ')',
  \ ],
  \ CheckAutocmd('ALERunOnFiletypeChangeGroup')

Execute (The SaveEvent should always be bound):
  let g:ale_enabled = 0
  let g:ale_lint_on_save = 0
  let g:ale_fix_on_save = 0

  AssertEqual [
  \ 'BufWritePost * call ale#events#SaveEvent(str2nr(expand(''<abuf>'')))',
  \], CheckAutocmd('ALERunOnSaveGroup')

Execute (g:ale_echo_cursor = 0 should bind no events):
  let g:ale_echo_cursor = 0

  AssertEqual [], CheckAutocmd('ALECursorGroup')

Execute (g:ale_echo_cursor = 1 should bind cursor events):
  let g:ale_echo_cursor = 1

  AssertEqual [
  \ 'CursorHold * call ale#cursor#EchoCursorWarningWithDelay()',
  \ 'CursorMoved * call ale#cursor#EchoCursorWarningWithDelay()',
  \ 'InsertLeave * call ale#cursor#EchoCursorWarning()',
  \], CheckAutocmd('ALECursorGroup')

Execute (ALECleanupGroup should include the right commands):
  AssertEqual [
  \ 'BufDelete * if exists(''*ale#engine#Cleanup'') | call ale#engine#Cleanup(str2nr(expand(''<abuf>''))) | endif',
  \ 'QuitPre * call ale#events#QuitEvent(str2nr(expand(''<abuf>'')))',
  \], CheckAutocmd('ALECleanupGroup')

Execute(Enabling completion should set up autocmd events correctly):
  let g:ale_completion_enabled = 0
  call ale#completion#Enable()

  AssertEqual [
  \ 'CompleteDone * call ale#completion#Done()',
  \ 'TextChangedI * call ale#completion#Queue()',
  \], CheckAutocmd('ALECompletionGroup')
  AssertEqual 1, g:ale_completion_enabled

Execute(Disabling completion should remove autocmd events correctly):
  let g:ale_completion_enabled = 1
  call ale#completion#Enable()
  call ale#completion#Disable()

  AssertEqual [], CheckAutocmd('ALECompletionGroup')
  AssertEqual 0, g:ale_completion_enabled