new_contents: """
  unit tests of the latex writer
  """
  
  import unittest
  import subprocess
  import tempfile
  import os
  import sys
  import BeautifulSoup
  
  from pyth.plugins.latex.writer import LatexWriter
  from pyth.plugins.python.reader import *
  
  
  class TestWriteLatex(unittest.TestCase):
  
      def test_basic(self):
          """
          Try to create an empty latex document
          """
          doc = PythonReader.read([])
          latex = LatexWriter.write(doc).getvalue()
  
      def test_paragraph(self):
          """
          Try a single paragraph document
          """
          doc = PythonReader.read(P[u"the text"])
          latex = LatexWriter.write(doc).getvalue()
          assert "the text" in latex
  
      def test_bold(self):
          doc = PythonReader.read([P[T(BOLD)[u"bold text"]]])
          latex = LatexWriter.write(doc).getvalue()
          assert r"\textbf{bold text}" in latex, latex
  
      def test_italic(self):
          doc = PythonReader.read([P[T(ITALIC)[u"italic text"]]])
          latex = LatexWriter.write(doc).getvalue()
          assert r"\emph{italic text}" in latex, latex
  
subject: Add unit tests for latex output