Before:
  Save g:ale_c_astyle_executable

  " Use an invalid global executable, so we don't match it.
  let g:ale_c_astyle_executable = 'xxxinvalid'
  let g:ale_cpp_astyle_executable = 'invalidpp'
  
  call ale#test#SetDirectory('/testplugin/test/fixers')

After:
  Restore

  call ale#test#RestoreDirectory()

Execute(The astyle callback should return the correct default values):
  call ale#test#SetFilename('../c_files/testfile.c')
  let targetfile = '/testplugin/test/c_files/testfile.c'

  AssertEqual
  \ {
  \   'command': ale#Escape(g:ale_c_astyle_executable)
  \     . ' --stdin=' . ale#Escape(targetfile)
  \ },
  \ ale#fixers#astyle#Fix(bufnr(''))

Execute(The astyle callback should support cpp files):
  call ale#test#SetFilename('../cpp_files/dummy.cpp')
  let targetfile = '/testplugin/test/cpp_files/dummy.cpp'
  set filetype=cpp " The test fails without this

  AssertEqual
  \ {
  \   'command': ale#Escape(g:ale_cpp_astyle_executable)
  \     . ' --stdin=' . ale#Escape(targetfile)
  \ },
  \ ale#fixers#astyle#Fix(bufnr(''))