晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/lib64/python2.7/idlelib/idle_test/test_widgetredir.py
"""Unittest for idlelib.WidgetRedirector

100% coverage
"""
from test.test_support import requires
import unittest
from idlelib.idle_test.mock_idle import Func
from Tkinter import Tk, Text, TclError
from idlelib.WidgetRedirector import WidgetRedirector


class InitCloseTest(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        requires('gui')
        cls.root = Tk()
        cls.root.withdraw()
        cls.text = Text(cls.root)

    @classmethod
    def tearDownClass(cls):
        del cls.text
        cls.root.destroy()
        del cls.root

    def test_init(self):
        redir = WidgetRedirector(self.text)
        self.assertEqual(redir.widget, self.text)
        self.assertEqual(redir.tk, self.text.tk)
        self.assertRaises(TclError, WidgetRedirector, self.text)
        redir.close()  # restore self.tk, self.text

    def test_close(self):
        redir = WidgetRedirector(self.text)
        redir.register('insert', Func)
        redir.close()
        self.assertEqual(redir._operations, {})
        self.assertFalse(hasattr(self.text, 'widget'))


class WidgetRedirectorTest(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        requires('gui')
        cls.root = Tk()
        cls.root.withdraw()
        cls.text = Text(cls.root)

    @classmethod
    def tearDownClass(cls):
        del cls.text
        cls.root.destroy()
        del cls.root

    def setUp(self):
        self.redir = WidgetRedirector(self.text)
        self.func = Func()
        self.orig_insert = self.redir.register('insert', self.func)
        self.text.insert('insert', 'asdf')  # leaves self.text empty

    def tearDown(self):
        self.text.delete('1.0', 'end')
        self.redir.close()

    def test_repr(self):  # partly for 100% coverage
        self.assertIn('Redirector', repr(self.redir))
        self.assertIn('Original', repr(self.orig_insert))

    def test_register(self):
        self.assertEqual(self.text.get('1.0', 'end'), '\n')
        self.assertEqual(self.func.args, ('insert', 'asdf'))
        self.assertIn('insert', self.redir._operations)
        self.assertIn('insert', self.text.__dict__)
        self.assertEqual(self.text.insert, self.func)

    def test_original_command(self):
        self.assertEqual(self.orig_insert.operation, 'insert')
        self.assertEqual(self.orig_insert.tk_call, self.text.tk.call)
        self.orig_insert('insert', 'asdf')
        self.assertEqual(self.text.get('1.0', 'end'), 'asdf\n')

    def test_unregister(self):
        self.assertIsNone(self.redir.unregister('invalid operation name'))
        self.assertEqual(self.redir.unregister('insert'), self.func)
        self.assertNotIn('insert', self.redir._operations)
        self.assertNotIn('insert', self.text.__dict__)

    def test_unregister_no_attribute(self):
        del self.text.insert
        self.assertEqual(self.redir.unregister('insert'), self.func)

    def test_dispatch_intercept(self):
        self.func.__init__(True)
        self.assertTrue(self.redir.dispatch('insert', False))
        self.assertFalse(self.func.args[0])

    def test_dispatch_bypass(self):
        self.orig_insert('insert', 'asdf')
        # tk.call returns '' where Python would return None
        self.assertEqual(self.redir.dispatch('delete', '1.0', 'end'), '')
        self.assertEqual(self.text.get('1.0', 'end'), '\n')

    def test_dispatch_error(self):
        self.func.__init__(TclError())
        self.assertEqual(self.redir.dispatch('insert', False), '')
        self.assertEqual(self.redir.dispatch('invalid'), '')

    def test_command_dispatch(self):
        # Test that .__init__ causes redirection of tk calls
        # through redir.dispatch
        self.root.call(self.text._w, 'insert', 'hello')
        self.assertEqual(self.func.args, ('hello',))
        self.assertEqual(self.text.get('1.0', 'end'), '\n')
        # Ensure that called through redir .dispatch and not through
        # self.text.insert by having mock raise TclError.
        self.func.__init__(TclError())
        self.assertEqual(self.root.call(self.text._w, 'insert', 'boo'), '')



if __name__ == '__main__':
    unittest.main(verbosity=2)

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