TST older nosetests compat in DictVectorizer test

Author: larsmans

sklearn/feature_extraction/tests/test_dict_vectorizer.py

@@ -5,10 +5,9 @@
 import numpy as np
 import scipy.sparse as sp
 
-from nose.tools import assert_equal, assert_in
-from nose.tools import assert_true
-from nose.tools import assert_false
 from numpy.testing import assert_array_equal
+from sklearn.utils.testing import (assert_equal, assert_in,
+                                   assert_false, assert_true)
 
 from sklearn.feature_extraction import DictVectorizer
 from sklearn.feature_selection import SelectKBest, chi2