Python MonkeyPatcher.runWithPatches方法代码示例

# 需要导入模块: from twisted.python.monkey import MonkeyPatcher [as 别名]
# 或者: from twisted.python.monkey.MonkeyPatcher import runWithPatches [as 别名]
    def test_exclude_from_tilde_expansion(self):
        basedir = "cli/Backup/exclude_from_tilde_expansion"
        fileutil.make_dirs(basedir)
        nodeurl_path = os.path.join(basedir, 'node.url')
        fileutil.write(nodeurl_path, 'http://example.net:2357/')

        # ensure that tilde expansion is performed on exclude-from argument
        exclude_file = u'~/.tahoe/excludes.dummy'

        ns = Namespace()
        ns.called = False
        def call_file(name, *args):
            ns.called = True
            self.failUnlessEqual(name, abspath_expanduser_unicode(exclude_file))
            return StringIO()

        patcher = MonkeyPatcher((__builtin__, 'file', call_file))
        patcher.runWithPatches(parse_options, basedir, "backup", ['--exclude-from', unicode_to_argv(exclude_file), 'from', 'to'])
        self.failUnless(ns.called)

# 需要导入模块: from twisted.python.monkey import MonkeyPatcher [as 别名]
# 或者: from twisted.python.monkey.MonkeyPatcher import runWithPatches [as 别名]
    def test_report_import_error(self):
        marker = "wheeeyo"
        real_import_func = __import__

        def raiseIE_from_this_particular_func(name, *args):
            if name == "foolscap":
                raise ImportError(marker + " foolscap cant be imported")
            else:
                return real_import_func(name, *args)

        # Let's run as little code as possible with __import__ patched.
        patcher = MonkeyPatcher((__builtin__, "__import__", raiseIE_from_this_particular_func))
        vers_and_locs, errors = patcher.runWithPatches(allmydata.get_package_versions_and_locations)

        foolscap_stuffs = [stuff for (pkg, stuff) in vers_and_locs if pkg == "foolscap"]
        self.failUnlessEqual(len(foolscap_stuffs), 1)
        comment = str(foolscap_stuffs[0][2])
        self.failUnlessIn(marker, comment)
        self.failUnlessIn("raiseIE_from_this_particular_func", comment)

        self.failUnless([e for e in errors if "dependency 'foolscap' could not be imported" in e])

# 需要导入模块: from twisted.python.monkey import MonkeyPatcher [as 别名]
# 或者: from twisted.python.monkey.MonkeyPatcher import runWithPatches [as 别名]
class MonkeyPatcherTest(unittest.TestCase):
    """
    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)
#.........这里部分代码省略.........