text: from snippets import Snippet
  from snippets import snippet_ranges
  from snippets import snippets
  
  
  def test_empty_snippets():
      lines = """\
  Line 1 is not part of a snippet
  # snippet prefix-1
  # snippet prefix-2
  # end snippet
  """.splitlines()
      r = snippet_ranges(lines)
      assert r == [(1, 2), (2, 4)]
      sn = snippets(lines)
      assert all(s.lines == [] for s in sn)
  