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"""Tests for the object inspection functionality.
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2010-2011 The IPython Development Team.
#
# Distributed under the terms of the BSD License.
#
# The full license is in the file COPYING.txt, distributed with this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
from __future__ import print_function
# Stdlib imports
# Third-party imports
import nose.tools as nt
# Our own imports
from .. import oinspect
from IPython.utils import py3compat
#-----------------------------------------------------------------------------
# Globals and constants
#-----------------------------------------------------------------------------
inspector = oinspect.Inspector()
#-----------------------------------------------------------------------------
# Local utilities
#-----------------------------------------------------------------------------
# A few generic objects we can then inspect in the tests below
class Call(object):
"""This is the class docstring."""
def __init__(self, x, y=1):
"""This is the constructor docstring."""
def __call__(self, *a, **kw):
"""This is the call docstring."""
def method(self, x, z=2):
"""Some method's docstring"""
class OldStyle:
"""An old-style class for testing."""
pass
def f(x, y=2, *a, **kw):
"""A simple function."""
def g(y, z=3, *a, **kw):
pass # no docstring
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>')
def test_calltip_builtin():
check_calltip(sum, 'sum', None, sum.__doc__)
def test_info():
"Check that Inspector.info fills out various fields as expected."
i = inspector.info(Call, oname='Call')
nt.assert_equal(i['type_name'], 'type')
expted_class = str(type(type)) # <class 'type'> (Python 3) or <type 'type'>
nt.assert_equal(i['base_class'], expted_class)
nt.assert_equal(i['string_form'], "<class 'IPython.core.tests.test_oinspect.Call'>")
fname = __file__
if fname.endswith(".pyc"):
fname = fname[:-1]
# case-insensitive comparison needed on some filesystems
# e.g. Windows:
nt.assert_equal(i['file'].lower(), fname.lower())
nt.assert_equal(i['definition'], 'Call(self, *a, **kw)\n')
nt.assert_equal(i['docstring'], Call.__doc__)
nt.assert_equal(i['source'], None)
nt.assert_true(i['isclass'])
nt.assert_equal(i['init_definition'], "Call(self, x, y=1)\n")
nt.assert_equal(i['init_docstring'], Call.__init__.__doc__)
i = inspector.info(Call, detail_level=1)
nt.assert_not_equal(i['source'], None)
nt.assert_equal(i['docstring'], None)
c = Call(1)
c.__doc__ = "Modified instance docstring"
i = inspector.info(c)
nt.assert_equal(i['type_name'], 'Call')
nt.assert_equal(i['docstring'], "Modified instance docstring")
nt.assert_equal(i['class_docstring'], Call.__doc__)
nt.assert_equal(i['init_docstring'], Call.__init__.__doc__)
nt.assert_equal(i['call_docstring'], c.__call__.__doc__)
# Test old-style classes, which for example may not have an __init__ method.
if not py3compat.PY3:
i = inspector.info(OldStyle)
nt.assert_equal(i['type_name'], 'classobj')
i = inspector.info(OldStyle())
nt.assert_equal(i['type_name'], 'instance')
nt.assert_equal(i['docstring'], OldStyle.__doc__)
def test_getdoc():
class A(object):
"""standard docstring"""
pass
class B(object):
"""standard docstring"""
def getdoc(self):
return "custom docstring"
class C(object):
"""standard docstring"""
def getdoc(self):
return None
a = A()
b = B()
c = C()
nt.assert_equal(oinspect.getdoc(a), "standard docstring")
nt.assert_equal(oinspect.getdoc(b), "custom docstring")
nt.assert_equal(oinspect.getdoc(c), "standard docstring")
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