[utils][tests][pycolorize] Remove nose

IPython/utils/tests/test_pycolorize.py

@@ -1,76 +1,73 b''
 # coding: utf-8
 """Test suite for our color utilities.
 
 Authors
 -------
 
 * Min RK
 """
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2011  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING.txt, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
-# third party
-import nose.tools as nt
-
 from IPython.testing.decorators import skip_iptest_but_not_pytest
 
 # our own
 from IPython.utils.PyColorize import Parser
 import io
 import pytest
 
 
 @pytest.fixture(scope="module", params=("Linux", "NoColor", "LightBG", "Neutral"))
 def style(request):
     yield request.param
 
 #-----------------------------------------------------------------------------
 # Test functions
 #-----------------------------------------------------------------------------
 
 sample = """
 def function(arg, *args, kwarg=True, **kwargs):
     '''
     this is docs
     '''
     pass is True
     False == None
 
     with io.open(ru'unicode'):
         raise ValueError("\n escape \r sequence")
 
     print("wěird ünicoðe")
 
 class Bar(Super):
 
     def __init__(self):
         super(Bar, self).__init__(1**2, 3^4, 5 or 6)
 """
 
 
 @skip_iptest_but_not_pytest
 def test_parse_sample(style):
     """and test writing to a buffer"""
     buf = io.StringIO()
     p = Parser(style=style)
     p.format(sample, buf)
     buf.seek(0)
     f1 = buf.read()
 
-    nt.assert_not_in("ERROR", f1)
+    assert "ERROR" not in f1
 
 
 @skip_iptest_but_not_pytest
 def test_parse_error(style):
     p = Parser(style=style)
     f1 = p.format(")", "str")
     if style != "NoColor":
-        nt.assert_in("ERROR", f1)
+        assert "ERROR" in f1