text: """Unit tests for the copy module."""
  
  import copy
  import copy_reg
  
  import unittest
  from test import test_support
  
  class TestCopy(unittest.TestCase):
  
      # Attempt full line coverage of copy.py from top to bottom
  
      def test_exceptions(self):
          self.assert_(copy.Error is copy.error)
          self.assert_(issubclass(copy.Error, Exception))
  
      # The copy() method
  
      def test_copy_basic(self):
          x = 42
          y = copy.copy(x)
          self.assertEqual(x, y)
  
      def test_copy_copy(self):
          class C(object):
              def __init__(self, foo):
                  self.foo = foo
              def __copy__(self):
                  return C(self.foo)
          x = C(42)
          y = copy.copy(x)
          self.assertEqual(y.__class__, x.__class__)
          self.assertEqual(y.foo, x.foo)
  
      def test_copy_registry(self):
          class C(object):
              def __new__(cls, foo):
                  obj = object.__new__(cls)
                  obj.foo = foo
                  return obj
          def pickle_C(obj):
              return (C, (obj.foo,))
          x = C(42)
          self.assertRaises(TypeError, copy.copy, x)
          copy_reg.pickle(C, pickle_C, C)
          y = copy.copy(x)
  
      def test_copy_reduce_ex(self):
          class C(object):
              def __reduce_ex__(self, proto):
                  return ""
              def __reduce__(self):
                  raise test_support.TestFailed, "shouldn't call this"
          x = C()
          y = copy.copy(x)
          self.assert_(y is x)
  
      def test_copy_reduce(self):
          class C(object):
              def __reduce__(self):
                  return ""
          x = C()
          y = copy.copy(x)
          self.assert_(y is x)
  
      def test_copy_cant(self):
          class C(object):
              def __getattribute__(self, name):
                  if name.startswith("__reduce"):
                      raise AttributeError, name
                  return object.__getattribute__(self, name)
          x = C()
          self.assertRaises(copy.Error, copy.copy, x)
  
      # Type-specific _copy_xxx() methods
  
      def test_copy_atomic(self):
          class Classic:
              pass
          class NewStyle(object):
              pass
          def f():
              pass
          tests = [None, 42, 2L**100, 3.14, True, False, 1j,
                   "hello", u"hello\u1234", f.func_code,
                   NewStyle, xrange(10), Classic, max]
          for x in tests:
              self.assert_(copy.copy(x) is x, repr(x))
  
      def test_copy_list(self):
          x = [1, 2, 3]
          self.assertEqual(copy.copy(x), x)
  
      def test_copy_tuple(self):
          x = (1, 2, 3)
          self.assertEqual(copy.copy(x), x)
  
      def test_copy_dict(self):
          x = {"foo": 1, "bar": 2}
          self.assertEqual(copy.copy(x), x)
  
      def test_copy_inst_vanilla(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C(42)
          self.assertEqual(copy.copy(x), x)
  
      def test_copy_inst_copy(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __copy__(self):
                  return C(self.foo)
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C(42)
          self.assertEqual(copy.copy(x), x)
  
      def test_copy_inst_getinitargs(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __getinitargs__(self):
                  return (self.foo,)
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C(42)
          self.assertEqual(copy.copy(x), x)
  
      def test_copy_inst_getstate(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __getstate__(self):
                  return {"foo": self.foo}
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C(42)
          self.assertEqual(copy.copy(x), x)
  
      def test_copy_inst_setstate(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __setstate__(self, state):
                  self.foo = state["foo"]
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C(42)
          self.assertEqual(copy.copy(x), x)
  
      def test_copy_inst_getstate_setstate(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __getstate__(self):
                  return self.foo
              def __setstate__(self, state):
                  self.foo = state
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C(42)
          self.assertEqual(copy.copy(x), x)
  
      # The deepcopy() method
  
      def test_deepcopy_basic(self):
          x = 42
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
  
      def test_deepcopy_memo(self):
          # Tests of reflexive objects are under type-specific sections below.
          # This tests only repetitions of objects.
          x = []
          x = [x, x]
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(y is not x)
          self.assert_(y[0] is not x[0])
          self.assert_(y[0] is y[1])
  
      def test_deepcopy_issubclass(self):
          # XXX Note: there's no way to test the TypeError coming out of
          # issubclass() -- this can only happen when an extension
          # module defines a "type" that doesn't formally inherit from
          # type.
          class Meta(type):
              pass
          class C:
              __metaclass__ = Meta
          self.assertEqual(copy.deepcopy(C), C)
  
      def test_deepcopy_deepcopy(self):
          class C(object):
              def __init__(self, foo):
                  self.foo = foo
              def __deepcopy__(self, memo=None):
                  return C(self.foo)
          x = C(42)
          y = copy.deepcopy(x)
          self.assertEqual(y.__class__, x.__class__)
          self.assertEqual(y.foo, x.foo)
  
      def test_deepcopy_registry(self):
          class C(object):
              def __new__(cls, foo):
                  obj = object.__new__(cls)
                  obj.foo = foo
                  return obj
          def pickle_C(obj):
              return (C, (obj.foo,))
          x = C(42)
          self.assertRaises(TypeError, copy.deepcopy, x)
          copy_reg.pickle(C, pickle_C, C)
          y = copy.deepcopy(x)
  
      def test_deepcopy_reduce_ex(self):
          class C(object):
              def __reduce_ex__(self, proto):
                  return ""
              def __reduce__(self):
                  raise test_support.TestFailed, "shouldn't call this"
          x = C()
          y = copy.deepcopy(x)
          self.assert_(y is x)
  
      def test_deepcopy_reduce(self):
          class C(object):
              def __reduce__(self):
                  return ""
          x = C()
          y = copy.deepcopy(x)
          self.assert_(y is x)
  
      def test_deepcopy_cant(self):
          class C(object):
              def __getattribute__(self, name):
                  if name.startswith("__reduce"):
                      raise AttributeError, name
                  return object.__getattribute__(self, name)
          x = C()
          self.assertRaises(copy.Error, copy.deepcopy, x)
  
      # Type-specific _deepcopy_xxx() methods
  
      def test_deepcopy_atomic(self):
          class Classic:
              pass
          class NewStyle(object):
              pass
          def f():
              pass
          tests = [None, 42, 2L**100, 3.14, True, False, 1j,
                   "hello", u"hello\u1234", f.func_code,
                   NewStyle, xrange(10), Classic, max]
          for x in tests:
              self.assert_(copy.deepcopy(x) is x, repr(x))
  
      def test_deepcopy_list(self):
          x = [[1, 2], 3]
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(x is not y)
          self.assert_(x[0] is not y[0])
  
      def test_deepcopy_reflexive_list(self):
          x = []
          x.append(x)
          y = copy.deepcopy(x)
          self.assertRaises(RuntimeError, cmp, y, x)
          self.assert_(y is not x)
          self.assert_(y[0] is y)
          self.assertEqual(len(y), 1)
  
      def test_deepcopy_tuple(self):
          x = ([1, 2], 3)
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(x is not y)
          self.assert_(x[0] is not y[0])
  
      def test_deepcopy_reflexive_tuple(self):
          x = ([],)
          x[0].append(x)
          y = copy.deepcopy(x)
          self.assertRaises(RuntimeError, cmp, y, x)
          self.assert_(y is not x)
          self.assert_(y[0] is not x[0])
          self.assert_(y[0][0] is y)
  
      def test_deepcopy_dict(self):
          x = {"foo": [1, 2], "bar": 3}
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(x is not y)
          self.assert_(x["foo"] is not y["foo"])
  
      def test_deepcopy_reflexive_dict(self):
          x = {}
          x['foo'] = x
          y = copy.deepcopy(x)
          self.assertRaises(RuntimeError, cmp, y, x)
          self.assert_(y is not x)
          self.assert_(y['foo'] is y)
          self.assertEqual(len(y), 1)
  
      def test_deepcopy_keepalive(self):
          memo = {}
          x = 42
          y = copy.deepcopy(x, memo)
          self.assert_(memo[id(x)] is x)
  
      def test_deepcopy_inst_vanilla(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C([42])
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(y.foo is not x.foo)
  
      def test_deepcopy_inst_deepcopy(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __deepcopy__(self, memo):
                  return C(copy.deepcopy(self.foo, memo))
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C([42])
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(y is not x)
          self.assert_(y.foo is not x.foo)
  
      def test_deepcopy_inst_getinitargs(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __getinitargs__(self):
                  return (self.foo,)
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C([42])
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(y is not x)
          self.assert_(y.foo is not x.foo)
  
      def test_deepcopy_inst_getstate(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __getstate__(self):
                  return {"foo": self.foo}
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C([42])
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(y is not x)
          self.assert_(y.foo is not x.foo)
  
      def test_deepcopy_inst_setstate(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __setstate__(self, state):
                  self.foo = state["foo"]
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C([42])
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(y is not x)
          self.assert_(y.foo is not x.foo)
  
      def test_deepcopy_inst_getstate_setstate(self):
          class C:
              def __init__(self, foo):
                  self.foo = foo
              def __getstate__(self):
                  return self.foo
              def __setstate__(self, state):
                  self.foo = state
              def __cmp__(self, other):
                  return cmp(self.foo, other.foo)
          x = C([42])
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(y is not x)
          self.assert_(y.foo is not x.foo)
  
      def test_deepcopy_reflexive_inst(self):
          class C:
              pass
          x = C()
          x.foo = x
          y = copy.deepcopy(x)
          self.assert_(y is not x)
          self.assert_(y.foo is y)
  
      # _reconstruct()
  
      def test_reconstruct_string(self):
          class C(object):
              def __reduce__(self):
                  return ""
          x = C()
          y = copy.copy(x)
          self.assert_(y is x)
          y = copy.deepcopy(x)
          self.assert_(y is x)
  
      def test_reconstruct_nostate(self):
          class C(object):
              def __reduce__(self):
                  return (C, ())
          x = C()
          x.foo = 42
          y = copy.copy(x)
          self.assert_(y.__class__ is x.__class__)
          y = copy.deepcopy(x)
          self.assert_(y.__class__ is x.__class__)
  
      def test_reconstruct_state(self):
          class C(object):
              def __reduce__(self):
                  return (C, (), self.__dict__)
              def __cmp__(self, other):
                  return cmp(self.__dict__, other.__dict__)
              __hash__ = None # Silence Py3k warning
          x = C()
          x.foo = [42]
          y = copy.copy(x)
          self.assertEqual(y, x)
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(y.foo is not x.foo)
  
      def test_reconstruct_state_setstate(self):
          class C(object):
              def __reduce__(self):
                  return (C, (), self.__dict__)
              def __setstate__(self, state):
                  self.__dict__.update(state)
              def __cmp__(self, other):
                  return cmp(self.__dict__, other.__dict__)
              __hash__ = None # Silence Py3k warning
          x = C()
          x.foo = [42]
          y = copy.copy(x)
          self.assertEqual(y, x)
          y = copy.deepcopy(x)
          self.assertEqual(y, x)
          self.assert_(y.foo is not x.foo)
  
      def test_reconstruct_reflexive(self):
          class C(object):
              pass
          x = C()
          x.foo = x
          y = copy.deepcopy(x)
          self.assert_(y is not x)
          self.assert_(y.foo is y)
  
      # Additions for Python 2.3 and pickle protocol 2
  
      def test_reduce_4tuple(self):
          class C(list):
              def __reduce__(self):
                  return (C, (), self.__dict__, iter(self))
              def __cmp__(self, other):
                  return (cmp(list(self), list(other)) or
                          cmp(self.__dict__, other.__dict__))
              __hash__ = None # Silence Py3k warning
          x = C([[1, 2], 3])
          y = copy.copy(x)
          self.assertEqual(x, y)
          self.assert_(x is not y)
          self.assert_(x[0] is y[0])
          y = copy.deepcopy(x)
          self.assertEqual(x, y)
          self.assert_(x is not y)
          self.assert_(x[0] is not y[0])
  
      def test_reduce_5tuple(self):
          class C(dict):
              def __reduce__(self):
                  return (C, (), self.__dict__, None, self.iteritems())
              def __cmp__(self, other):
                  return (cmp(dict(self), list(dict)) or
                          cmp(self.__dict__, other.__dict__))
              __hash__ = None # Silence Py3k warning
          x = C([("foo", [1, 2]), ("bar", 3)])
          y = copy.copy(x)
          self.assertEqual(x, y)
          self.assert_(x is not y)
          self.assert_(x["foo"] is y["foo"])
          y = copy.deepcopy(x)
          self.assertEqual(x, y)
          self.assert_(x is not y)
          self.assert_(x["foo"] is not y["foo"])
  
      def test_copy_slots(self):
          class C(object):
              __slots__ = ["foo"]
          x = C()
          x.foo = [42]
          y = copy.copy(x)
          self.assert_(x.foo is y.foo)
  
      def test_deepcopy_slots(self):
          class C(object):
              __slots__ = ["foo"]
          x = C()
          x.foo = [42]
          y = copy.deepcopy(x)
          self.assertEqual(x.foo, y.foo)
          self.assert_(x.foo is not y.foo)
  
      def test_copy_list_subclass(self):
          class C(list):
              pass
          x = C([[1, 2], 3])
          x.foo = [4, 5]
          y = copy.copy(x)
          self.assertEqual(list(x), list(y))
          self.assertEqual(x.foo, y.foo)
          self.assert_(x[0] is y[0])
          self.assert_(x.foo is y.foo)
  
      def test_deepcopy_list_subclass(self):
          class C(list):
              pass
          x = C([[1, 2], 3])
          x.foo = [4, 5]
          y = copy.deepcopy(x)
          self.assertEqual(list(x), list(y))
          self.assertEqual(x.foo, y.foo)
          self.assert_(x[0] is not y[0])
          self.assert_(x.foo is not y.foo)
  
      def test_copy_tuple_subclass(self):
          class C(tuple):
              pass
          x = C([1, 2, 3])
          self.assertEqual(tuple(x), (1, 2, 3))
          y = copy.copy(x)
          self.assertEqual(tuple(y), (1, 2, 3))
  
      def test_deepcopy_tuple_subclass(self):
          class C(tuple):
              pass
          x = C([[1, 2], 3])
          self.assertEqual(tuple(x), ([1, 2], 3))
          y = copy.deepcopy(x)
          self.assertEqual(tuple(y), ([1, 2], 3))
          self.assert_(x is not y)
          self.assert_(x[0] is not y[0])
  
      def test_getstate_exc(self):
          class EvilState(object):
              def __getstate__(self):
                  raise ValueError, "ain't got no stickin' state"
          self.assertRaises(ValueError, copy.copy, EvilState())
  
      def test_copy_function(self):
          self.assertEqual(copy.copy(global_foo), global_foo)
          def foo(x, y): return x+y
          self.assertEqual(copy.copy(foo), foo)
          bar = lambda: None
          self.assertEqual(copy.copy(bar), bar)
  
      def test_deepcopy_function(self):
          self.assertEqual(copy.deepcopy(global_foo), global_foo)
          def foo(x, y): return x+y
          self.assertEqual(copy.deepcopy(foo), foo)
          bar = lambda: None
          self.assertEqual(copy.deepcopy(bar), bar)
  
  def global_foo(x, y): return x+y
  
  def test_main():
      test_support.run_unittest(TestCopy)
  
  if __name__ == "__main__":
      test_main()
  