[core][tests][completerlib] Remove nose

IPython/core/tests/test_completerlib.py

@@ -14,8 +14,6 b' import tempfile'
 import unittest
 from os.path import join
 
-import nose.tools as nt
-
 from IPython.core.completerlib import magic_run_completer, module_completion, try_import
 from IPython.utils.tempdir import TemporaryDirectory
 from IPython.testing.decorators import onlyif_unicode_paths
@@ -140,7 +138,7 b' def test_import_invalid_module():'
 
         s = set( module_completion('import foo') )
         intersection = s.intersection(invalid_module_names)
-        nt.assert_equal(intersection, set())
+        assert intersection == set()
 
         assert valid_module_names.issubset(s), valid_module_names.intersection(s)
 
@@ -153,15 +151,15 b' def test_bad_module_all():'
     testsdir = os.path.dirname(__file__)
     sys.path.insert(0, testsdir)
     try:
-        results = module_completion('from bad_all import ')
-        nt.assert_in('puppies', results)
+        results = module_completion("from bad_all import ")
+        assert "puppies" in results
         for r in results:
-            nt.assert_is_instance(r, str)
+            assert isinstance(r, str)
 
         # bad_all doesn't contain submodules, but this completion
         # should finish without raising an exception:
         results = module_completion("import bad_all.")
-        nt.assert_equal(results, [])
+        assert results == []
     finally:
         sys.path.remove(testsdir)
 
@@ -189,6 +187,6 b' def test_valid_exported_submodules():'
     """
     results = module_completion("import os.pa")
     # ensure we get a valid submodule:
-    nt.assert_in("os.path", results)
+    assert "os.path" in results
     # ensure we don't get objects that aren't submodules:
-    nt.assert_not_in("os.pathconf", results)
+    assert "os.pathconf" not in results