  from nose.tools import assert_equal
  from nose.tools import raises
  
  
  class TestBstValidate(object):
  
      @raises(Exception)
      def test_bst_validate_empty(self):
          validate_bst(None)
  
 
</s> remove from nose.tools import assert_equal
from nose.tools import raises
 </s> add import unittest </s> remove from nose.tools import assert_equal
from nose.tools import raises
 </s> add import unittest </s> remove class TestBstSuccessor(object):
 </s> add class TestBstSuccessor(unittest.TestCase): </s> remove     @raises(Exception)
 </s> add  </s> remove from nose.tools import assert_equal
from nose.tools import raises
 </s> add import unittest
class TestBstValidate(unittest.TestCase):
  from nose.tools import assert_equal
  from nose.tools import raises
  
  
class TestBstValidate(unittest.TestCase):
  
      @raises(Exception)
      def test_bst_validate_empty(self):
          validate_bst(None)
  
keep keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for graphs_trees/ (#277) 
graphs_trees/bst_validate/test_bst_validate.py