/usr/lib/python3/dist-packages/twisted/test/test_monkey.py is in python3-twisted-experimental 13.2.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | # Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for L{twisted.python.monkey}.
"""
from __future__ import division, absolute_import
from twisted.trial import unittest
from twisted.python.monkey import MonkeyPatcher
class TestObj:
def __init__(self):
self.foo = 'foo value'
self.bar = 'bar value'
self.baz = 'baz value'
class MonkeyPatcherTest(unittest.SynchronousTestCase):
"""
Tests for L{MonkeyPatcher} monkey-patching class.
"""
def setUp(self):
self.testObject = TestObj()
self.originalObject = TestObj()
self.monkeyPatcher = MonkeyPatcher()
def test_empty(self):
"""
A monkey patcher without patches shouldn't change a thing.
"""
self.monkeyPatcher.patch()
# We can't assert that all state is unchanged, but at least we can
# check our test object.
self.assertEqual(self.originalObject.foo, self.testObject.foo)
self.assertEqual(self.originalObject.bar, self.testObject.bar)
self.assertEqual(self.originalObject.baz, self.testObject.baz)
def test_constructWithPatches(self):
"""
Constructing a L{MonkeyPatcher} with patches should add all of the
given patches to the patch list.
"""
patcher = MonkeyPatcher((self.testObject, 'foo', 'haha'),
(self.testObject, 'bar', 'hehe'))
patcher.patch()
self.assertEqual('haha', self.testObject.foo)
self.assertEqual('hehe', self.testObject.bar)
self.assertEqual(self.originalObject.baz, self.testObject.baz)
def test_patchExisting(self):
"""
Patching an attribute that exists sets it to the value defined in the
patch.
"""
self.monkeyPatcher.addPatch(self.testObject, 'foo', 'haha')
self.monkeyPatcher.patch()
self.assertEqual(self.testObject.foo, 'haha')
def test_patchNonExisting(self):
"""
Patching a non-existing attribute fails with an C{AttributeError}.
"""
self.monkeyPatcher.addPatch(self.testObject, 'nowhere',
'blow up please')
self.assertRaises(AttributeError, self.monkeyPatcher.patch)
def test_patchAlreadyPatched(self):
"""
Adding a patch for an object and attribute that already have a patch
overrides the existing patch.
"""
self.monkeyPatcher.addPatch(self.testObject, 'foo', 'blah')
self.monkeyPatcher.addPatch(self.testObject, 'foo', 'BLAH')
self.monkeyPatcher.patch()
self.assertEqual(self.testObject.foo, 'BLAH')
self.monkeyPatcher.restore()
self.assertEqual(self.testObject.foo, self.originalObject.foo)
def test_restoreTwiceIsANoOp(self):
"""
Restoring an already-restored monkey patch is a no-op.
"""
self.monkeyPatcher.addPatch(self.testObject, 'foo', 'blah')
self.monkeyPatcher.patch()
self.monkeyPatcher.restore()
self.assertEqual(self.testObject.foo, self.originalObject.foo)
self.monkeyPatcher.restore()
self.assertEqual(self.testObject.foo, self.originalObject.foo)
def test_runWithPatchesDecoration(self):
"""
runWithPatches should run the given callable, passing in all arguments
and keyword arguments, and return the return value of the callable.
"""
log = []
def f(a, b, c=None):
log.append((a, b, c))
return 'foo'
result = self.monkeyPatcher.runWithPatches(f, 1, 2, c=10)
self.assertEqual('foo', result)
self.assertEqual([(1, 2, 10)], log)
def test_repeatedRunWithPatches(self):
"""
We should be able to call the same function with runWithPatches more
than once. All patches should apply for each call.
"""
def f():
return (self.testObject.foo, self.testObject.bar,
self.testObject.baz)
self.monkeyPatcher.addPatch(self.testObject, 'foo', 'haha')
result = self.monkeyPatcher.runWithPatches(f)
self.assertEqual(
('haha', self.originalObject.bar, self.originalObject.baz), result)
result = self.monkeyPatcher.runWithPatches(f)
self.assertEqual(
('haha', self.originalObject.bar, self.originalObject.baz),
result)
def test_runWithPatchesRestores(self):
"""
C{runWithPatches} should restore the original values after the function
has executed.
"""
self.monkeyPatcher.addPatch(self.testObject, 'foo', 'haha')
self.assertEqual(self.originalObject.foo, self.testObject.foo)
self.monkeyPatcher.runWithPatches(lambda: None)
self.assertEqual(self.originalObject.foo, self.testObject.foo)
def test_runWithPatchesRestoresOnException(self):
"""
Test runWithPatches restores the original values even when the function
raises an exception.
"""
def _():
self.assertEqual(self.testObject.foo, 'haha')
self.assertEqual(self.testObject.bar, 'blahblah')
raise RuntimeError("Something went wrong!")
self.monkeyPatcher.addPatch(self.testObject, 'foo', 'haha')
self.monkeyPatcher.addPatch(self.testObject, 'bar', 'blahblah')
self.assertRaises(RuntimeError, self.monkeyPatcher.runWithPatches, _)
self.assertEqual(self.testObject.foo, self.originalObject.foo)
self.assertEqual(self.testObject.bar, self.originalObject.bar)
|