[utils][tests][process] Remove nose

IPython/utils/tests/test_process.py

@@ -20,9 +20,8 import os
 import time
 from _thread import interrupt_main  # Py 3
 import threading
-from unittest import SkipTest
 
-import nose.tools as nt
+import pytest
 
 from IPython.utils.process import (find_cmd, FindCmdError, arg_split,
                                    system, getoutput, getoutputerror,
@@ -41,8 +40,8 python = os.path.basename(sys.executable)
 @dec.skip_win32
 def test_find_cmd_ls():
     """Make sure we can find the full path to ls."""
-    path = find_cmd('ls')
-    nt.assert_true(path.endswith('ls'))
+    path = find_cmd("ls")
+    assert path.endswith("ls")
 
     
 def has_pywin32():
@@ -64,7 +63,7 def test_find_cmd_pythonw():
             "This test runs on posix or in win32 with win32api installed")
 def test_find_cmd_fail():
     """Make sure that FindCmdError is raised if we can't find the cmd."""
-    nt.assert_raises(FindCmdError,find_cmd,'asdfasdf')
+    pytest.raises(FindCmdError, find_cmd, "asdfasdf")
 
 
 # TODO: move to pytest.mark.parametrize once nose gone
@@ -121,7 +120,7 class SubProcessTestCase(tt.TempFileMixin):
         Interrupt a subprocess after a second.
         """
         if threading.main_thread() != threading.current_thread():
-            raise nt.SkipTest("Can't run this test if not in main thread.")
+            raise pytest.skip("Can't run this test if not in main thread.")
 
         # Some tests can overwrite SIGINT handler (by using pdb for example),
         # which then breaks this test, so just make sure it's operating