text: from __future__ import absolute_import, print_function
  
  import ruyaml as yaml
  
  
  def test_marks(marks_filename, verbose=False):
      with open(marks_filename, 'r') as fp0:
          inputs = fp0.read().split('---\n')[1:]
      for input in inputs:
          index = 0
          line = 0
          column = 0
          while input[index] != '*':
              if input[index] == '\n':
                  line += 1
                  column = 0
              else:
                  column += 1
              index += 1
          mark = yaml.Mark(marks_filename, index, line, column, str(input), index)
          snippet = mark.get_snippet(indent=2, max_length=79)
          if verbose:
              print(snippet)
          assert isinstance(snippet, str), type(snippet)
          assert snippet.count('\n') == 1, snippet.count('\n')
          data, pointer = snippet.split('\n')
          assert len(data) < 82, len(data)
          assert data[len(pointer) - 1] == '*', data[len(pointer) - 1]
  
  
  test_marks.unittest = ['.marks']
  
  if __name__ == '__main__':
      import test_appliance
  
      test_appliance.run(globals())
  