import pickle

from cStringIO import StringIO

from test import test_support

from test.pickletester import AbstractPickleTests

from test.pickletester import AbstractPickleModuleTests

from test.pickletester import AbstractPersistentPicklerTests

class PickleTests(AbstractPickleTests, AbstractPickleModuleTests):

    def dumps(self, arg, proto=0, fast=0):

        # Ignore fast

        return pickle.dumps(arg, proto)

    def loads(self, buf):

        # Ignore fast

        return pickle.loads(buf)

    module = pickle

    error = KeyError

class PicklerTests(AbstractPickleTests):

    error = KeyError

    def dumps(self, arg, proto=0, fast=0):

        f = StringIO()

        p = pickle.Pickler(f, proto)

        if fast:

            p.fast = fast

        p.dump(arg)

        f.seek(0)

        return f.read()

    def loads(self, buf):

        f = StringIO(buf)

        u = pickle.Unpickler(f)

        return u.load()

class PersPicklerTests(AbstractPersistentPicklerTests):

    def dumps(self, arg, proto=0, fast=0):

        class PersPickler(pickle.Pickler):

            def persistent_id(subself, obj):

                return self.persistent_id(obj)

        f = StringIO()

        p = PersPickler(f, proto)

        if fast:

            p.fast = fast

        p.dump(arg)

        f.seek(0)

        return f.read()

    def loads(self, buf):

        class PersUnpickler(pickle.Unpickler):

            def persistent_load(subself, obj):

                return self.persistent_load(obj)

        f = StringIO(buf)

        u = PersUnpickler(f)

        return u.load()

def test_main():

    test_support.run_unittest(

        PickleTests,

        PicklerTests,

        PersPicklerTests

    )

    test_support.run_doctest(pickle)

if __name__ == "__main__":

    test_main()