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。 sh-3ll

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DIR:/opt/cloudlinux/venv/lib64/python3.11/site-packages/testfixtures/tests/
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Current File : //opt/cloudlinux/venv/lib64/python3.11/site-packages/testfixtures/tests/test_replacer.py
from unittest import TestCase

from testfixtures import Replacer, ShouldRaise


class TestReplacer(TestCase):

    def test_function(self):
        from testfixtures.tests import sample1
        assert sample1.z() == 'original z'

        def test_z():
          return 'replacement z'

        r = Replacer()
        r.replace('testfixtures.tests.sample1.z',test_z)

        assert sample1.z() == 'replacement z'

        r.restore()

        assert sample1.z() == 'original z'

    def test_class(self):
        from testfixtures.tests import sample1
        x = sample1.X()
        assert x.__class__.__name__ == 'X'

        class XReplacement(sample1.X): pass

        r = Replacer()
        r.replace('testfixtures.tests.sample1.X', XReplacement)

        x = sample1.X()
        assert x.__class__.__name__ == 'XReplacement'
        assert sample1.X().y() == 'original y'

        r.restore()

        x = sample1.X()
        assert x.__class__.__name__ == 'X'

    def test_method(self):
        from testfixtures.tests import sample1
        assert sample1.X().y() == 'original y'

        def test_y(self):
          return 'replacement y'

        r = Replacer()
        r.replace('testfixtures.tests.sample1.X.y',test_y)

        assert sample1.X().y()[:38] == 'replacement y'

        r.restore()

        assert sample1.X().y() == 'original y'

    def test_class_method(self):
        from testfixtures.tests import sample1
        c = sample1.X
        assert sample1.X.aMethod() is c

        def rMethod(cls):
          return cls, 1

        r = Replacer()
        r.replace('testfixtures.tests.sample1.X.aMethod',rMethod)

        sample1.X.aMethod()
        assert sample1.X.aMethod() == (c, 1)

        r.restore()

        sample1.X.aMethod()
        assert sample1.X.aMethod() is c

    def test_multiple_replace(self):
        from testfixtures.tests import sample1
        assert sample1.z() == 'original z'
        assert sample1.X().y() == 'original y'

        def test_y(self):
          return self.__class__.__name__
        def test_z():
          return 'replacement z'

        r = Replacer()
        r.replace('testfixtures.tests.sample1.z',test_z)
        r.replace('testfixtures.tests.sample1.X.y',test_y)

        assert sample1.z() == 'replacement z'
        assert sample1.X().y() == 'X'

        r.restore()

        assert sample1.z() == 'original z'
        assert sample1.X().y() == 'original y'

    def test_gotcha(self):
        # Just because you replace an object in one context:

        from testfixtures.tests import sample1
        from testfixtures.tests import sample2
        assert sample1.z() == 'original z'

        def test_z():
          return 'replacement z'

        r = Replacer()
        r.replace('testfixtures.tests.sample1.z',test_z)

        assert sample1.z() == 'replacement z'

        # Doesn't meant that it's replaced in all contexts:

        assert sample2.z() == 'original z'

        r.restore()

    def test_remove_called_twice(self):
        from testfixtures.tests import sample1

        def test_z(): pass

        r = Replacer()
        r.replace('testfixtures.tests.sample1.z',test_z)

        r.restore()
        assert sample1.z() == 'original z'

        r.restore()
        assert sample1.z() == 'original z'

    def test_with_statement(self):
        from testfixtures.tests import sample1
        assert sample1.z() == 'original z'

        def test_z():
          return 'replacement z'

        with Replacer() as r:
            r.replace('testfixtures.tests.sample1.z',test_z)
            assert sample1.z() == 'replacement z'

        assert sample1.z() == 'original z'

    def test_not_there(self):
        def test_bad(): pass

        with Replacer() as r:
            with ShouldRaise(AttributeError("Original 'bad' not found")):
                r.replace('testfixtures.tests.sample1.bad', test_bad)