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"""Tests for the object inspection functionality.
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2010-2011 The IPython Development Team.
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#
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# Distributed under the terms of the BSD License.
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#
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# The full license is in the file COPYING.txt, distributed with this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from __future__ import print_function
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# Stdlib imports
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import os
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# Third-party imports
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import nose.tools as nt
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# Our own imports
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from .. import oinspect
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from IPython.core.magic import (Magics, magics_class, line_magic,
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cell_magic, line_cell_magic,
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register_line_magic, register_cell_magic,
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register_line_cell_magic)
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from IPython.utils import py3compat
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#-----------------------------------------------------------------------------
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# Globals and constants
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#-----------------------------------------------------------------------------
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inspector = oinspect.Inspector()
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ip = get_ipython()
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#-----------------------------------------------------------------------------
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# Local utilities
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#-----------------------------------------------------------------------------
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# WARNING: since this test checks the line number where a function is
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# defined, if any code is inserted above, the following line will need to be
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# updated. Do NOT insert any whitespace between the next line and the function
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# definition below.
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THIS_LINE_NUMBER = 45 # Put here the actual number of this line
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def test_find_source_lines():
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nt.assert_equal(oinspect.find_source_lines(test_find_source_lines),
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THIS_LINE_NUMBER+1)
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def test_find_file():
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nt.assert_equal(oinspect.find_file(test_find_file),
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os.path.abspath(__file__))
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def test_find_file_magic():
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run = ip.find_line_magic('run')
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nt.assert_not_equal(oinspect.find_file(run), None)
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# A few generic objects we can then inspect in the tests below
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class Call(object):
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"""This is the class docstring."""
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def __init__(self, x, y=1):
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"""This is the constructor docstring."""
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def __call__(self, *a, **kw):
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"""This is the call docstring."""
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def method(self, x, z=2):
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"""Some method's docstring"""
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class OldStyle:
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"""An old-style class for testing."""
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pass
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def f(x, y=2, *a, **kw):
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"""A simple function."""
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def g(y, z=3, *a, **kw):
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pass # no docstring
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@register_line_magic
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def lmagic(line):
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"A line magic"
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@register_cell_magic
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def cmagic(line, cell):
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"A cell magic"
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@register_line_cell_magic
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def lcmagic(line, cell=None):
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"A line/cell magic"
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@magics_class
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class SimpleMagics(Magics):
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@line_magic
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def Clmagic(self, cline):
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"A class-based line magic"
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@cell_magic
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def Ccmagic(self, cline, ccell):
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"A class-based cell magic"
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@line_cell_magic
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def Clcmagic(self, cline, ccell=None):
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"A class-based line/cell magic"
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def check_calltip(obj, name, call, docstring):
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"""Generic check pattern all calltip tests will use"""
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info = inspector.info(obj, name)
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call_line, ds = oinspect.call_tip(info)
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nt.assert_equal(call_line, call)
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nt.assert_equal(ds, docstring)
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#-----------------------------------------------------------------------------
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# Tests
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#-----------------------------------------------------------------------------
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def test_calltip_class():
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check_calltip(Call, 'Call', 'Call(x, y=1)', Call.__init__.__doc__)
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def test_calltip_instance():
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c = Call(1)
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check_calltip(c, 'c', 'c(*a, **kw)', c.__call__.__doc__)
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def test_calltip_method():
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c = Call(1)
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check_calltip(c.method, 'c.method', 'c.method(x, z=2)', c.method.__doc__)
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def test_calltip_function():
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check_calltip(f, 'f', 'f(x, y=2, *a, **kw)', f.__doc__)
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def test_calltip_function2():
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check_calltip(g, 'g', 'g(y, z=3, *a, **kw)', '<no docstring>')
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def test_calltip_builtin():
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check_calltip(sum, 'sum', None, sum.__doc__)
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def test_calltip_line_magic():
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check_calltip(lmagic, 'lmagic', 'lmagic(line)', "A line magic")
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def test_calltip_cell_magic():
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check_calltip(cmagic, 'cmagic', 'cmagic(line, cell)', "A cell magic")
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def test_calltip_line_magic():
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check_calltip(lcmagic, 'lcmagic', 'lcmagic(line, cell=None)',
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"A line/cell magic")
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def test_class_magics():
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cm = SimpleMagics(ip)
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ip.register_magics(cm)
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check_calltip(cm.Clmagic, 'Clmagic', 'Clmagic(cline)',
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"A class-based line magic")
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check_calltip(cm.Ccmagic, 'Ccmagic', 'Ccmagic(cline, ccell)',
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"A class-based cell magic")
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check_calltip(cm.Clcmagic, 'Clcmagic', 'Clcmagic(cline, ccell=None)',
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"A class-based line/cell magic")
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def test_info():
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"Check that Inspector.info fills out various fields as expected."
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i = inspector.info(Call, oname='Call')
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nt.assert_equal(i['type_name'], 'type')
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expted_class = str(type(type)) # <class 'type'> (Python 3) or <type 'type'>
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nt.assert_equal(i['base_class'], expted_class)
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nt.assert_equal(i['string_form'], "<class 'IPython.core.tests.test_oinspect.Call'>")
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fname = __file__
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if fname.endswith(".pyc"):
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fname = fname[:-1]
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# case-insensitive comparison needed on some filesystems
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# e.g. Windows:
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nt.assert_equal(i['file'].lower(), fname.lower())
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nt.assert_equal(i['definition'], 'Call(self, *a, **kw)\n')
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nt.assert_equal(i['docstring'], Call.__doc__)
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nt.assert_equal(i['source'], None)
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nt.assert_true(i['isclass'])
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nt.assert_equal(i['init_definition'], "Call(self, x, y=1)\n")
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nt.assert_equal(i['init_docstring'], Call.__init__.__doc__)
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i = inspector.info(Call, detail_level=1)
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nt.assert_not_equal(i['source'], None)
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nt.assert_equal(i['docstring'], None)
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c = Call(1)
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c.__doc__ = "Modified instance docstring"
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i = inspector.info(c)
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nt.assert_equal(i['type_name'], 'Call')
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nt.assert_equal(i['docstring'], "Modified instance docstring")
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nt.assert_equal(i['class_docstring'], Call.__doc__)
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nt.assert_equal(i['init_docstring'], Call.__init__.__doc__)
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nt.assert_equal(i['call_docstring'], c.__call__.__doc__)
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# Test old-style classes, which for example may not have an __init__ method.
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if not py3compat.PY3:
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i = inspector.info(OldStyle)
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nt.assert_equal(i['type_name'], 'classobj')
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i = inspector.info(OldStyle())
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nt.assert_equal(i['type_name'], 'instance')
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nt.assert_equal(i['docstring'], OldStyle.__doc__)
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def test_getdoc():
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class A(object):
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"""standard docstring"""
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pass
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class B(object):
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"""standard docstring"""
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def getdoc(self):
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return "custom docstring"
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class C(object):
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"""standard docstring"""
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def getdoc(self):
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return None
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a = A()
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b = B()
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c = C()
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nt.assert_equal(oinspect.getdoc(a), "standard docstring")
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nt.assert_equal(oinspect.getdoc(b), "custom docstring")
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nt.assert_equal(oinspect.getdoc(c), "standard docstring")
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