Before:
  silent! cd /testplugin/test
  silent file top/middle/bottom/dummy.txt

  function! CheckTempFile(filename) abort
    " Check every part of the temporary filename, except the random part.
    AssertEqual fnamemodify(tempname(), ':h'), fnamemodify(a:filename, ':h:h')
    AssertEqual 'dummy.txt', fnamemodify(a:filename, ':t')
  endfunction

After:
  unlet! g:result
  unlet! g:match

  delfunction CheckTempFile

Execute(FormatCommand should do nothing to basic command strings):
  AssertEqual ['', 'awesome-linter do something'], ale#command#FormatCommand(bufnr('%'), 'awesome-linter do something', 0)

Execute(FormatCommand should handle %%, and ignore other percents):
  AssertEqual ['', '% %%d %%f %x %'], ale#command#FormatCommand(bufnr('%'), '%% %%%d %%%f %x %', 0)

Execute(FormatCommand should convert %s to the current filename):
  AssertEqual
  \ [
  \   '',
  \   'foo ' . ale#Escape(expand('%:p')) . ' bar ' . ale#Escape(expand('%:p'))
  \ ],
  \ ale#command#FormatCommand(bufnr('%'), 'foo %s bar %s', 0)

Execute(FormatCommand should convert %t to a new temporary filename):
  let g:result = ale#command#FormatCommand(bufnr('%'), 'foo %t bar %t', 0)

  call CheckTempFile(g:result[0])

  let g:match = matchlist(g:result[1], '\v^foo (.*) bar (.*)$')

  Assert !empty(g:match), 'No match found! Result was: ' . g:result[1]
  " The first item of the result should be a temporary filename, and it should
  " be the same as the escaped name in the command string.
  AssertEqual ale#Escape(g:result[0]), g:match[1]
  " The two temporary filenames formatted in should be the same.
  AssertEqual g:match[1], g:match[2]

Execute(FormatCommand should let you combine %s and %t):
  let g:result = ale#command#FormatCommand(bufnr('%'), 'foo %t bar %s', 0)

  call CheckTempFile(g:result[0])

  let g:match = matchlist(g:result[1], '\v^foo (.*) bar (.*)$')

  Assert !empty(g:match), 'No match found! Result was: ' . g:result[1]
  " The first item of the result should be a temporary filename, and it should
  " be the same as the escaped name in the command string.
  AssertEqual ale#Escape(g:result[0]), g:match[1]
  " The second item should be equal to the original filename.
  AssertEqual ale#Escape(expand('%:p')), g:match[2]

Execute(EscapeCommandPart should escape all percent signs):
  AssertEqual '%%s %%t %%%% %%s %%t %%%%', ale#engine#EscapeCommandPart('%s %t %% %s %t %%')

Execute(EscapeCommandPart should pipe in temporary files appropriately):
  let g:result = ale#command#FormatCommand(bufnr('%'), 'foo bar', 1)

  call CheckTempFile(g:result[0])

  let g:match = matchlist(g:result[1], '\v^foo bar \< (.*)$')
  Assert !empty(g:match), 'No match found! Result was: ' . g:result[1]
  AssertEqual ale#Escape(g:result[0]), g:match[1]

  let g:result = ale#command#FormatCommand(bufnr('%'), 'foo bar %t', 1)

  call CheckTempFile(g:result[0])

  let g:match = matchlist(g:result[1], '\v^foo bar (.*)$')
  Assert !empty(g:match), 'No match found! Result was: ' . g:result[1]
  AssertEqual ale#Escape(g:result[0]), g:match[1]