Before:
  runtime ale_linters/scala/scalastyle.vim

After:
  call ale#linter#Reset()
  let g:ale_scala_scalastyle_options = ''
  let g:ale_scalastyle_conf_loc = ''

Execute(Should return the correct default command):
  AssertEqual
  \   'scalastyle %t',
  \   ale_linters#scala#scalastyle#GetCommand(bufnr(''))

Execute(Should allow using a custom config file):
  let g:ale_scalastyle_config_loc = '/dooper/config.xml'

  AssertEqual
  \   'scalastyle --config ''/dooper/config.xml'' %t',
  \   ale_linters#scala#scalastyle#GetCommand(bufnr(''))

Execute(Should allow using custom options):
  let g:ale_scala_scalastyle_options = '--warnings false --quiet true'

  AssertEqual
  \   'scalastyle --config ''/dooper/config.xml'' --warnings false --quiet true %t',
  \   ale_linters#scala#scalastyle#GetCommand(bufnr(''))