old_contents: import unittest
  import os
  import pkgutil
  
  from robot.running import namespace
  from robot.running.namespace import _VariableScopes
  from robot import libraries
  from robot.utils.asserts import assert_equals
  
  class TestNamespace(unittest.TestCase):
  
      def test_standard_library_names(self):
          module_path = os.path.dirname(libraries.__file__)
          exp_libs = [m[1] for m in pkgutil.iter_modules([module_path])
                      if not m[1].startswith('Deprecated')]
          assert_equals(exp_libs, namespace.STDLIB_NAMES)
  
  class TestVariableScopes(unittest.TestCase):
  
      def test_len(self):
          assert_equals(len(_VariableScopes(None, None)), 0)
          assert_equals(len(_VariableScopes(DummySuite(), None)), 2)
          assert_equals(len(_VariableScopes(None, _VariableScopes(DummySuite(), None))), 0)
  
  
  class DummySuite(object):
  
      def __init__(self):
          self.variables = {'foo': 'bar', 'quuz': 'blaah'}
  
new_contents: import unittest
  import os
  import pkgutil
  
  from robot.running import namespace
  from robot.running.namespace import _VariableScopes
  from robot import libraries
  from robot.utils.asserts import assert_equals
  
  class TestNamespace(unittest.TestCase):
  
      def test_standard_library_names(self):
          module_path = os.path.dirname(libraries.__file__)
          exp_libs = [name for _, name, _ in pkgutil.iter_modules([module_path])
                      if name[0].isupper() and not name.startswith('Deprecated')]
          assert_equals(exp_libs, namespace.STDLIB_NAMES)
  
  class TestVariableScopes(unittest.TestCase):
  
      def test_len(self):
          assert_equals(len(_VariableScopes(None, None)), 0)
          assert_equals(len(_VariableScopes(DummySuite(), None)), 2)
          assert_equals(len(_VariableScopes(None, _VariableScopes(DummySuite(), None))), 0)
  
  
  class DummySuite(object):
  
      def __init__(self):
          self.variables = {'foo': 'bar', 'quuz': 'blaah'}
  
subject: test fix after splitting helper modules from Dialogs library