text: """Tests for LaTeX utilities."""
  
  import unittest
  
  from latex_utils import (get_relevant_warnings,
                           remove_accented_characters,
                           open_webpage)
  
  
  class TestLaTeXUtils(unittest.TestCase):
      def test_get_relevant_warnings(self):
          """Test that relevant warnings are extracted from a LaTeX log file."""
          test_log = """
                     Overfull \hbox (24.00002pt too wide) in paragraph at lines 245--268
                     LaTeX Warning: Citation `Qhydo4' on page 2 undefined on input line 304.
                     Underfull \hbox (badness 1132) in paragraph at lines 1347--1348
                     """
          expected_warnings = ["Overfull \hbox (24.00002pt too wide) in paragraph at lines 245--268",
                               "LaTeX Warning: Citation `Qhydo4' on page 2 undefined on input line 304."]
          self.assertEqual(get_relevant_warnings(test_log), expected_warnings)
  
      def test_accented_character_removal(self):
          """Test that accented strings are correctly normalized."""
          self.assertEqual(remove_accented_characters("Jean-Sébastien Caux"), "Jean-Sebastien Caux")
          self.assertEqual(remove_accented_characters("Caux"), "Caux")
          self.assertEqual(remove_accented_characters("Jérôme"), "Jerome")
  
      def test_webpage_access(self):
          """Test that webpages are retrieved and errors handled correctly."""
          # Test 404 error catching.
          with self.assertRaises(SystemExit):
              open_webpage("http://example.com/404")
          # Test no system exit on error.
          self.assertFalse(open_webpage("http://example.com/404", exit_on_error=False)[0])
          # Test succesfull connection to site.
          self.assertEqual(open_webpage("http://example.com/")[1].status_code, 200)
  