[utils][tests][io] Remove nose

IPython/utils/tests/test_io.py

@@ -1,89 +1,87 b''
 # encoding: utf-8
 """Tests for io.py"""
 
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 
 import sys
 from io import StringIO
 
 from subprocess import Popen, PIPE
 import unittest
 
-import nose.tools as nt
-
 from IPython.utils.io import IOStream, Tee, capture_output
 
 
 def test_tee_simple():
     "Very simple check with stdout only"
     chan = StringIO()
     text = 'Hello'
     tee = Tee(chan, channel='stdout')
     print(text, file=chan)
-    nt.assert_equal(chan.getvalue(), text+"\n")
+    assert chan.getvalue() == text + "\n"
 
 
 class TeeTestCase(unittest.TestCase):
 
     def tchan(self, channel):
         trap = StringIO()
         chan = StringIO()
         text = 'Hello'
         
         std_ori = getattr(sys, channel)
         setattr(sys, channel, trap)
 
         tee = Tee(chan, channel=channel)
 
         print(text, end='', file=chan)
         trap_val = trap.getvalue()
-        nt.assert_equal(chan.getvalue(), text)
+        self.assertEqual(chan.getvalue(), text)
 
         tee.close()
 
         setattr(sys, channel, std_ori)
         assert getattr(sys, channel) == std_ori
 
     def test(self):
         for chan in ['stdout', 'stderr']:
             self.tchan(chan)
 
 def test_io_init():
     """Test that io.stdin/out/err exist at startup"""
     for name in ('stdin', 'stdout', 'stderr'):
         cmd = "from IPython.utils import io;print(io.%s.__class__)"%name
         with Popen([sys.executable, '-c', cmd], stdout=PIPE) as p:
             p.wait()
             classname = p.stdout.read().strip().decode('ascii')
         # __class__ is a reference to the class object in Python 3, so we can't
         # just test for string equality.
         assert 'IPython.utils.io.IOStream' in classname, classname
 
 class TestIOStream(unittest.TestCase):
 
     def test_IOStream_init(self):
         """IOStream initializes from a file-like object missing attributes. """
         # Cause a failure from getattr and dir(). (Issue #6386)
         class BadStringIO(StringIO):
             def __dir__(self):
                 attrs = super().__dir__()
                 attrs.append('name')
                 return attrs
         with self.assertWarns(DeprecationWarning):
             iostream = IOStream(BadStringIO())
             iostream.write('hi, bad iostream\n')
 
         assert not hasattr(iostream, 'name')
         iostream.close()
 
     def test_capture_output(self):
         """capture_output() context works"""
         
         with capture_output() as io:
-            print('hi, stdout')
-            print('hi, stderr', file=sys.stderr)
-        
-        nt.assert_equal(io.stdout, 'hi, stdout\n')
-        nt.assert_equal(io.stderr, 'hi, stderr\n')
+            print("hi, stdout")
+            print("hi, stderr", file=sys.stderr)
+
+        self.assertEqual(io.stdout, "hi, stdout\n")
+        self.assertEqual(io.stderr, "hi, stderr\n")