Before:
  Save g:ale_r_lintr_options

  unlet! g:ale_r_lintr_options
  unlet! b:ale_r_lintr_options

  runtime ale_linters/r/lintr.vim

After:
  Restore

  unlet! b:ale_r_lintr_options

  call ale#linter#Reset()

Execute(The default lintr command should be correct):
  AssertEqual
  \   'cd ' . ale#Escape(getcwd()) . ' && '
  \   . 'Rscript -e '
  \   . ale#Escape('lintr::lint(commandArgs(TRUE)[1], eval(parse(text = commandArgs(TRUE)[2])))')
  \   . ' %t '
  \   . ale#Escape('lintr::with_defaults()'),
  \ ale_linters#r#lintr#GetCommand(bufnr(''))

Execute(The lintr options should be configurable):
  let b:ale_r_lintr_options = 'lintr::with_defaults(object_usage_linter = NULL)'

  AssertEqual
  \   'cd ' . ale#Escape(getcwd()) . ' && '
  \   . 'Rscript -e '
  \   . ale#Escape('lintr::lint(commandArgs(TRUE)[1], eval(parse(text = commandArgs(TRUE)[2])))')
  \   . ' %t '
  \   . ale#Escape('lintr::with_defaults(object_usage_linter = NULL)'),
  \ ale_linters#r#lintr#GetCommand(bufnr(''))