Before:
  Save g:ale_c_clangformat_executable

  " Use an invalid global executable, so we don't match it.
  let g:ale_c_clangformat_executable = 'xxxinvalid'

  call ale#test#SetDirectory('/testplugin/test/fixers')
  silent cd ..
  silent cd command_callback
  let g:dir = getcwd()

After:
  Restore

  call ale#test#RestoreDirectory()

Execute(The clang-format callback should return the correct default values):
  call ale#test#SetFilename('c_paths/dummy.c')

  AssertEqual
  \ {
  \   'command': ale#Escape(g:ale_c_clangformat_executable)
  \       . ' '
  \ },
  \ ale#fixers#clangformat#Fix(bufnr(''))

Execute(The clangformat callback should include any additional options):
  call ale#test#SetFilename('c_paths/dummy.c')
  let g:ale_c_clangformat_options = '--some-option'

  AssertEqual
  \ {
  \   'command': ale#Escape(g:ale_c_clangformat_executable)
  \     . ' --some-option',
  \ },
  \ ale#fixers#clangformat#Fix(bufnr(''))