text: import pytest
  
  from beholder.file_comparator.comparators import FileComparator
  
  
  @pytest.fixture
  def equal_files_pair(tmp_path):
      content = '''
      <html>
          <head>
              <title>Hello world</title>
          </head>
          <body>
              <p>
                  Once upon a time, there lived a young Python developer. One day,
                  he got bored of having to dig through vague duck-typing studded
                  endless chunks of poor quality code and the poor brave developer
                  became
                  a
                  sailor.
              </p>
          </body>
      </html>
      '''
      f1 = tmp_path / 'f1.html'
      f2 = tmp_path / 'f2.html'
      f1.write_text(content)
      f2.write_text(content)
      return f1, f2
  
  
  @pytest.fixture
  def nonequal_files_pair(tmp_path):
      content1 = '''
      <html>
          <head>
          </head>
          <body>
          </body>
      </html>
      '''
      content2 = '''
      <html>
          <head>
              <title>Java1.7 + AWT -> Graphics Designer Starter Kit </title>
          </head>
          <body>
          </body>
      </html>
      '''
      f1 = tmp_path / 'f1.html'
      f2 = tmp_path / 'f2.html'
      f1.write_text(content1)
      f2.write_text(content2)
      return f1, f2
  
  
  def test_simple_comparator_equal_files(equal_files_pair):
      f1, f2 = equal_files_pair
      comparator = FileComparator()
  
      result = comparator.compare(f1, f2)
  
      assert result.diffs == []
  
  
  def test_with_diffs_comparator_equal_files(equal_files_pair):
      f1, f2 = equal_files_pair
      comparator = FileComparator()
  
      result = comparator.compare(f1, f2)
  
      assert result.diffs == []
  
  
  def test_with_diffs_comparator_nonequal_files(nonequal_files_pair):
      f1, f2 = nonequal_files_pair
      comparator = FileComparator()
  
      result = comparator.compare(f1, f2)
  
      assert result.diffs == [
          '--- \n',
          '+++ \n',
          '@@ -1,6 +1,7 @@\n',
          ' ',
          '     <html>',
          '         <head>',
          '+            <title>Java1.7 + AWT -> Graphics Designer Starter Kit </title>',
          '         </head>', '         <body>', '         </body>',
      ]
  