old_contents: """Tests for RSTExporter"""
  
  #-----------------------------------------------------------------------------
  # Copyright (c) 2013, the IPython Development Team.
  #
  # Distributed under the terms of the Modified BSD License.
  #
  # The full license is in the file COPYING.txt, distributed with this software.
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Imports
  #-----------------------------------------------------------------------------
  
  from .base import ExportersTestsBase
  from ..rst import RSTExporter
  from IPython.testing.decorators import onlyif_cmds_exist
  
  #-----------------------------------------------------------------------------
  # Class
  #-----------------------------------------------------------------------------
  
  class TestRSTExporter(ExportersTestsBase):
      """Tests for RSTExporter"""
  
      exporter_class = RSTExporter
      should_include_raw = ['rst']
  
      def test_constructor(self):
          """
          Can a RSTExporter be constructed?
          """
          RSTExporter()
  
  
      @onlyif_cmds_exist('pandoc')
      def test_export(self):
          """
          Can a RSTExporter export something?
          """
          (output, resources) = RSTExporter().from_filename(self._get_notebook())
          assert len(output) > 0
  
new_contents: """Tests for RSTExporter"""
  
  #-----------------------------------------------------------------------------
  # Copyright (c) 2013, the IPython Development Team.
  #
  # Distributed under the terms of the Modified BSD License.
  #
  # The full license is in the file COPYING.txt, distributed with this software.
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Imports
  #-----------------------------------------------------------------------------
  
  import io
  
  from IPython.nbformat import current
  
  from .base import ExportersTestsBase
  from ..rst import RSTExporter
  from IPython.testing.decorators import onlyif_cmds_exist
  
  #-----------------------------------------------------------------------------
  # Class
  #-----------------------------------------------------------------------------
  
  class TestRSTExporter(ExportersTestsBase):
      """Tests for RSTExporter"""
  
      exporter_class = RSTExporter
      should_include_raw = ['rst']
  
      def test_constructor(self):
          """
          Can a RSTExporter be constructed?
          """
          RSTExporter()
  
  
      @onlyif_cmds_exist('pandoc')
      def test_export(self):
          """
          Can a RSTExporter export something?
          """
          (output, resources) = RSTExporter().from_filename(self._get_notebook())
          assert len(output) > 0
          
      @onlyif_cmds_exist('pandoc')
      def test_empty_code_cell(self):
          """No empty code cells in rst"""
          nbname = self._get_notebook()
          with io.open(nbname, encoding='utf8') as f:
              nb = current.read(f, 'json')
          
          exporter = self.exporter_class()
          
          (output, resources) = exporter.from_notebook_node(nb)
          # add an empty code cell
          nb.worksheets[0].cells.append(
              current.new_code_cell(input="")
          )
          (output2, resources) = exporter.from_notebook_node(nb)
          # adding an empty code cell shouldn't change output
          self.assertEqual(output.strip(), output2.strip())
          
  
subject: test rst export with empty code cells