Before:
  Save g:ale_less_lessc_executable
  Save g:ale_less_lessc_use_global
  Save g:ale_less_lessc_options

  unlet! b:executable

  unlet! g:ale_less_lessc_executable
  unlet! g:ale_less_lessc_use_global
  unlet! g:ale_less_lessc_options

  call ale#test#SetDirectory('/testplugin/test/command_callback')
  call ale#test#SetFilename('testfile.less')

  runtime ale_linters/less/lessc.vim

After:
  Restore

  unlet! b:executable
  unlet! b:ale_less_lessc_executable
  unlet! b:ale_less_lessc_use_global
  unlet! b:ale_less_lessc_options

  call ale#test#SetFilename('test.txt')

  call ale#test#RestoreDirectory()
  call ale#linter#Reset()

Execute(node_modules directories should be discovered):
  call ale#test#SetFilename('lessc_paths/nested/testfile.less')

  let b:executable = ale#path#Simplify(
  \   g:dir
  \   . '/lessc_paths/node_modules/.bin/lessc'
  \)

  AssertEqual
  \ b:executable,
  \ ale_linters#less#lessc#GetExecutable(bufnr(''))

  AssertEqual
  \ ale#Escape(b:executable)
  \   . ' --no-color --lint'
  \   . ' --include-path='
  \     . ale#Escape(ale#path#Simplify(g:dir . '/lessc_paths/nested'))
  \   . ' -',
  \ ale_linters#less#lessc#GetCommand(bufnr(''))

Execute(The global override should work):
  let b:ale_less_lessc_executable = 'foobar'
  let b:ale_less_lessc_use_global = 1

  call ale#test#SetFilename('lessc_paths/nested/testfile.less')

  AssertEqual
  \ 'foobar',
  \ ale_linters#less#lessc#GetExecutable(bufnr(''))

  AssertEqual
  \ ale#Escape('foobar')
  \   . ' --no-color --lint'
  \   . ' --include-path='
  \     . ale#Escape(ale#path#Simplify(g:dir . '/lessc_paths/nested'))
  \   . ' -',
  \ ale_linters#less#lessc#GetCommand(bufnr(''))

Execute(Extra options should be configurable):
  let b:ale_less_lessc_options = '--whatever'

  AssertEqual
  \ 'lessc',
  \ ale_linters#less#lessc#GetExecutable(bufnr(''))

  AssertEqual
  \ ale#Escape('lessc')
  \   . ' --no-color --lint'
  \   . ' --include-path='
  \     . ale#Escape(ale#path#Simplify(g:dir))
  \   . ' --whatever'
  \   . ' -',
  \ ale_linters#less#lessc#GetCommand(bufnr(''))