Before:
  Save g:ale_go_gofmt_executable
  Save g:ale_go_gofmt_options
  Save g:ale_go_go111module

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

  call ale#test#SetDirectory('/testplugin/test/fixers')

After:
  Restore

  unlet! b:ale_go_go111module

  call ale#test#RestoreDirectory()

Execute(The gofmt callback should return the correct default values):
  call ale#test#SetFilename('../go_files/testfile.go')

  AssertEqual
  \ {
  \   'command': ale#Escape('xxxinvalid'),
  \ },
  \ ale#fixers#gofmt#Fix(bufnr(''))

Execute(The gofmt callback should include custom gofmt options):
  let g:ale_go_gofmt_options = "-r '(a) -> a'"

  call ale#test#SetFilename('../go_files/testfile.go')

  AssertEqual
  \ {
  \   'command': ale#Escape('xxxinvalid')
  \     . ' ' . g:ale_go_gofmt_options,
  \ },
  \ ale#fixers#gofmt#Fix(bufnr(''))

Execute(The gofmt callback should support Go environment variables):
  let g:ale_go_go111module = 'off'

  call ale#test#SetFilename('../go_files/testfile.go')

  AssertEqual
  \ {
  \   'command': ale#Env('GO111MODULE', 'off')
  \     . ale#Escape('xxxinvalid')
  \ },
  \ ale#fixers#gofmt#Fix(bufnr(''))