old_contents: import logging
  import unittest
  from satella.imports import import_class
  import subprocess
  import warnings
  
  logger = logging.getLogger(__name__)
  
  
  class TestImports(unittest.TestCase):
      def test_imports(self):
          import tests.test_imports.importa
          with warnings.catch_warnings() as warns:
              tests.test_imports.importa.do_import()
          self.assertGreater(len(warns), 0)
  
          # this as well checks for the namespace's pollution
          self.assertEqual(set(tests.test_imports.importa.importb.__all__),
                           {'logger', 'sub', 'logging', 'add'})
  
          self.assertEqual(tests.test_imports.importa.importb.add(4, 5), 9)
          self.assertEqual(tests.test_imports.importa.importb.sub(4, 5), -1)
          self.assertRaises(AttributeError, lambda: tests.test_imports.importa.importb.mul(1, 2))
  
      def test_import_class(self):
          p_open = import_class('subprocess.Popen')
          self.assertIs(p_open, subprocess.Popen)
          self.assertRaises(ImportError, lambda: import_class('subprocess.DoesNotExist'))
  
new_contents: import logging
  import unittest
  from satella.imports import import_class
  import subprocess
  import warnings
  
  logger = logging.getLogger(__name__)
  
  
  class TestImports(unittest.TestCase):
      def test_imports(self):
          import tests.test_imports.importa
          with warnings.catch_warnings(record=True) as warns:
              tests.test_imports.importa.do_import()
          self.assertGreater(len(warns), 0)
  
          # this as well checks for the namespace's pollution
          self.assertEqual(set(tests.test_imports.importa.importb.__all__),
                           {'logger', 'sub', 'logging', 'add'})
  
          self.assertEqual(tests.test_imports.importa.importb.add(4, 5), 9)
          self.assertEqual(tests.test_imports.importa.importb.sub(4, 5), -1)
          self.assertRaises(AttributeError, lambda: tests.test_imports.importa.importb.mul(1, 2))
  
      def test_import_class(self):
          p_open = import_class('subprocess.Popen')
          self.assertIs(p_open, subprocess.Popen)
          self.assertRaises(ImportError, lambda: import_class('subprocess.DoesNotExist'))
  
subject: fix test for import