This commit,

* Add deprecation and warning message for call_tip function

* Remove check_calltip function in tests

* Remove all the tests which use check_calltip to  test 'call_tip' functionality.

IPython/core/oinspect.py

@@ -41,6 +41,7 b' from IPython.utils.wildcard import list_namespace'
 from IPython.utils.coloransi import TermColors, ColorScheme, ColorSchemeTable
 from IPython.utils.py3compat import cast_unicode, string_types, PY3
 from IPython.utils.colorable import Colorable
+from IPython.utils.decorators import undoc
 
 from pygments import highlight
 from pygments.lexers import PythonLexer
@@ -231,31 +232,12 b' def format_argspec(argspec):'
     return inspect.formatargspec(argspec['args'], argspec['varargs'],
                                  argspec['varkw'], argspec['defaults'])
 
-
+@undoc
 def call_tip(oinfo, format_call=True):
-    """Extract call tip data from an oinfo dict.
-
-    Parameters
-    ----------
-    oinfo : dict
-
-    format_call : bool, optional
-      If True, the call line is formatted and returned as a string.  If not, a
-      tuple of (name, argspec) is returned.
-
-    Returns
-    -------
-    call_info : None, str or (str, dict) tuple.
-      When format_call is True, the whole call information is formattted as a
-      single string.  Otherwise, the object's name and its argspec dict are
-      returned.  If no call information is available, None is returned.
-
-    docstring : str or None
-      The most relevant docstring for calling purposes is returned, if
-      available.  The priority is: call docstring for callable instances, then
-      constructor docstring for classes, then main object's docstring otherwise
-      (regular functions).
+    """DEPRECATED. Extract call tip data from an oinfo dict.
     """
+    warnings.warn('`call_tip` function is deprecated as of IPython 5.2 '
+                  'and will have no effects.', DeprecationWarning, stacklevel=2)
     # Get call definition
     argspec = oinfo.get('argspec')
     if argspec is None:

IPython/core/tests/test_oinspect.py

@@ -206,69 +206,10 b' class SerialLiar(object):'
     def __getattr__(self, item):
         return SerialLiar(self.max_fibbing_twig, self.lies_told + 1)
 
-
-def check_calltip(obj, name, call, docstring):
-    """Generic check pattern all calltip tests will use"""
-    info = inspector.info(obj, name)
-    call_line, ds = oinspect.call_tip(info)
-    nt.assert_equal(call_line, call)
-    nt.assert_equal(ds, docstring)
-
 #-----------------------------------------------------------------------------
 # Tests
 #-----------------------------------------------------------------------------
 
-def test_calltip_class():
-    check_calltip(Call, 'Call', 'Call(x, y=1)', Call.__init__.__doc__)
-
-
-def test_calltip_instance():
-    c = Call(1)
-    check_calltip(c, 'c', 'c(*a, **kw)', c.__call__.__doc__)
-
-
-def test_calltip_method():
-    c = Call(1)
-    check_calltip(c.method, 'c.method', 'c.method(x, z=2)', c.method.__doc__)
-
-
-def test_calltip_function():
-    check_calltip(f, 'f', 'f(x, y=2, *a, **kw)', f.__doc__)
-
-
-def test_calltip_function2():
-    check_calltip(g, 'g', 'g(y, z=3, *a, **kw)', '<no docstring>')
-
-
-@skipif(sys.version_info >= (3, 5))
-def test_calltip_builtin():
-    check_calltip(sum, 'sum', None, sum.__doc__)
-
-
-def test_calltip_line_magic():
-    check_calltip(lmagic, 'lmagic', 'lmagic(line)', "A line magic")
-
-        
-def test_calltip_cell_magic():
-    check_calltip(cmagic, 'cmagic', 'cmagic(line, cell)', "A cell magic")
-
-        
-def test_calltip_line_cell_magic():
-    check_calltip(lcmagic, 'lcmagic', 'lcmagic(line, cell=None)', 
-                  "A line/cell magic")
-        
-
-def test_class_magics():
-    cm = SimpleMagics(ip)
-    ip.register_magics(cm)
-    check_calltip(cm.Clmagic, 'Clmagic', 'Clmagic(cline)',
-                  "A class-based line magic")
-    check_calltip(cm.Ccmagic, 'Ccmagic', 'Ccmagic(cline, ccell)',
-                  "A class-based cell magic")
-    check_calltip(cm.Clcmagic, 'Clcmagic', 'Clcmagic(cline, ccell=None)',
-                  "A class-based line/cell magic")
-    
-
 def test_info():
     "Check that Inspector.info fills out various fields as expected."
     i = inspector.info(Call, oname='Call')