old_contents: from thumbnailer import _resizer
  from unittest import TestCase, main
  import os.path as path
  from PIL import Image
  
  class ThumbnailerTests(TestCase):
  
      def path(self, filename):
          return path.join(self.img_path, filename)
  
      def setUp(self):
          self.img_path = path.join(path.dirname(__file__), "test_data")
          self.img = Image.open(self.path("sample_image.jpg"))
  
      def testSquare(self):
          r = _resizer('square', '100', self.img_path)
          output = r.resize(self.img)
          self.assertEqual((100, 100), output.size)
  
      def testExact(self):
          r = _resizer('exact', '250x100', self.img_path)
          output = r.resize(self.img)
          self.assertEqual((250, 100), output.size)
  
      def testWidth(self):
          r = _resizer('aspect', '250x?', self.img_path)
          output = r.resize(self.img)
          self.assertEqual((250, 166), output.size)
  
      def testHeight(self):
          r = _resizer('aspect', '?x250', self.img_path)
          output = r.resize(self.img)
          self.assertEqual((375, 250), output.size)
  
  class ThumbnailerFilenameTest(TestCase):
  
      def path(self, *parts):
          return path.join(self.img_path, *parts)
  
      def setUp(self):
          self.img_path = path.join(path.dirname(__file__), "test_data")
  
      def testRoot(self):
          """Test a file that is in the root of img_path."""
  
          r = _resizer('square', '100', self.img_path)
          new_name = r.get_thumbnail_name(self.path('sample_image.jpg'))
          self.assertEqual('sample_image_square.jpg', new_name)
  
      def testRootWithSlash(self):
          r = _resizer('square', '100', self.img_path + '/')
          new_name = r.get_thumbnail_name(self.path('sample_image.jpg'))
          self.assertEqual('sample_image_square.jpg', new_name)
  
      def testSubdir(self):
          """Test a file that is in a sub-directory of img_path."""
  
          r = _resizer('square', '100', self.img_path)
          new_name = r.get_thumbnail_name(self.path('subdir', 'sample_image.jpg'))
          self.assertEqual('subdir/sample_image_square.jpg', new_name)
  
  if __name__=="__main__":
      main()
  
new_contents: from thumbnailer import _resizer
  from unittest import TestCase, main
  import os
  from PIL import Image
  
  class ThumbnailerTests(TestCase):
  
      def path(self, filename):
          return os.path.join(self.img_path, filename)
  
      def setUp(self):
          self.img_path = os.path.join(os.path.dirname(__file__), "test_data")
          self.img = Image.open(self.path("sample_image.jpg"))
  
      def testSquare(self):
          r = _resizer('square', '100', self.img_path)
          output = r.resize(self.img)
          self.assertEqual((100, 100), output.size)
  
      def testExact(self):
          r = _resizer('exact', '250x100', self.img_path)
          output = r.resize(self.img)
          self.assertEqual((250, 100), output.size)
  
      def testWidth(self):
          r = _resizer('aspect', '250x?', self.img_path)
          output = r.resize(self.img)
          self.assertEqual((250, 166), output.size)
  
      def testHeight(self):
          r = _resizer('aspect', '?x250', self.img_path)
          output = r.resize(self.img)
          self.assertEqual((375, 250), output.size)
  
  class ThumbnailerFilenameTest(TestCase):
  
      def path(self, *parts):
          return os.path.join(self.img_path, *parts)
  
      def setUp(self):
          self.img_path = os.path.join(os.path.dirname(__file__), "test_data")
  
      def testRoot(self):
          """Test a file that is in the root of img_path."""
  
          r = _resizer('square', '100', self.img_path)
          new_name = r.get_thumbnail_name(self.path('sample_image.jpg'))
          self.assertEqual('sample_image_square.jpg', new_name)
  
      def testRootWithSlash(self):
          r = _resizer('square', '100', self.img_path + '/')
          new_name = r.get_thumbnail_name(self.path('sample_image.jpg'))
          self.assertEqual('sample_image_square.jpg', new_name)
  
      def testSubdir(self):
          """Test a file that is in a sub-directory of img_path."""
  
          r = _resizer('square', '100', self.img_path)
          new_name = r.get_thumbnail_name(self.path('subdir', 'sample_image.jpg'))
          self.assertEqual('subdir/sample_image_square.jpg', new_name)
  
  if __name__=="__main__":
      main()
  
subject: Modify module import syntax to avoid confusion with test method