コード例 #1
0
 def setUp(self):
     self.engine = ExecutionEngine()
     self.econtext = ExecutionContext()
     self.state_reader = StateReader()
コード例 #2
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class BlockchainInteropTest(BlockchainFixtureTestCase):
    engine = None
    econtext = None
    state_reader = None

    @classmethod
    def leveldb_testpath(self):
        return os.path.join(settings.DATA_DIR_PATH, 'fixtures/test_chain')

    @classmethod
    def setUpClass(cls):
        super(BlockchainInteropTest, cls).setUpClass()
        settings.set_loglevel(DEBUG)

    def setUp(self):
        self.engine = ExecutionEngine()
        self.econtext = ExecutionContext(engine=self.engine)
        self.state_reader = StateReader()

    def test_interop_getblock(self):
        height = StackItem.New(9369)

        self.econtext.EvaluationStack.PushT(height)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Blockchain_GetBlock(self.engine)

        block = self.econtext.EvaluationStack.Pop().GetInterface()

        self.assertIsInstance(block, Block)

    def test_interop_get_transaction(self):
        u256 = UInt256.ParseString(
            '8be9660512991d36e016b8ced6fda5d611d26a0f6e2faaaf1f379496edb3395f')

        hash = StackItem.New(u256.Data)

        self.econtext.EvaluationStack.PushT(hash)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Blockchain_GetTransaction(self.engine)

        tx = self.econtext.EvaluationStack.Pop().GetInterface()

        self.assertIsInstance(tx, Transaction)

    def test_interop_get_bad_transaction(self):

        u256 = UInt256.ParseString(
            '8be9660512991d36e016b8ced6fda5d611d26a0f6e2faaaf1f379496edb33956')

        hash = StackItem.New(u256.Data)

        self.econtext.EvaluationStack.PushT(hash)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Blockchain_GetTransaction(self.engine)

        tx = self.econtext.EvaluationStack.Pop().GetInterface()

        self.assertIsNone(tx)

    def test_interop_get_transaction_height(self):
        u256 = UInt256.ParseString(
            '8be9660512991d36e016b8ced6fda5d611d26a0f6e2faaaf1f379496edb3395f')

        hash = StackItem.New(u256.Data)

        self.econtext.EvaluationStack.PushT(hash)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Blockchain_GetTransactionHeight(self.engine)

        height = self.econtext.EvaluationStack.Pop().GetBigInteger()

        self.assertEqual(height, 9369)

    def test_interop_get_bad_transaction_height(self):
        u256 = UInt256.ParseString(
            '8be9660512991d36e016b8ced6fda5d611d26a0f6e2faaaf1f379496edb33956')

        hash = StackItem.New(u256.Data)

        self.econtext.EvaluationStack.PushT(hash)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Blockchain_GetTransactionHeight(self.engine)

        height = self.econtext.EvaluationStack.Pop().GetBigInteger()

        self.assertEqual(height, -1)
コード例 #3
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class BlockchainInteropTest(BlockchainFixtureTestCase):
    engine = None
    econtext = None
    state_reader = None

    @classmethod
    def leveldb_testpath(self):
        return os.path.join(settings.DATA_DIR_PATH, 'fixtures/test_chain')

    @classmethod
    def setUpClass(cls):
        super(BlockchainInteropTest, cls).setUpClass()
        settings.set_loglevel(DEBUG)

    def setUp(self):
        self.engine = ExecutionEngine()
        self.econtext = ExecutionContext()
        self.state_reader = StateReader()

    def test_interop_getblock(self):

        height = StackItem.New(1234)

        self.engine.EvaluationStack.PushT(height)
        self.state_reader.Blockchain_GetBlock(self.engine)

        block = self.engine.EvaluationStack.Pop().GetInterface()

        self.assertIsInstance(block, Block)

    def test_interop_get_transaction(self):

        u256 = UInt256.ParseString(
            'e4d2ea5df2adf77df91049beccbb16f98863b93a16439c60381eac1f23bff178')

        hash = StackItem.New(u256.Data)

        self.engine.EvaluationStack.PushT(hash)
        self.state_reader.Blockchain_GetTransaction(self.engine)

        tx = self.engine.EvaluationStack.Pop().GetInterface()

        self.assertIsInstance(tx, Transaction)

    def test_interop_get_bad_transaction(self):

        u256 = UInt256.ParseString(
            'e4d2ea5df2adf77df91049beccbb16f98863b93a16439c60381eac1f23bff176')

        hash = StackItem.New(u256.Data)

        self.engine.EvaluationStack.PushT(hash)
        self.state_reader.Blockchain_GetTransaction(self.engine)

        tx = self.engine.EvaluationStack.Pop().GetInterface()

        self.assertIsNone(tx)

    def test_interop_get_transaction_height(self):

        u256 = UInt256.ParseString(
            'e4d2ea5df2adf77df91049beccbb16f98863b93a16439c60381eac1f23bff178')

        hash = StackItem.New(u256.Data)

        self.engine.EvaluationStack.PushT(hash)
        self.state_reader.Blockchain_GetTransactionHeight(self.engine)

        height = self.engine.EvaluationStack.Pop().GetBigInteger()

        self.assertEqual(height, 4999)

    def test_interop_get_bad_transaction_height(self):

        u256 = UInt256.ParseString(
            'e4d2ea5df2adf77df91049beccbb16f98863b93a16439c60381eac1f23bff176')

        hash = StackItem.New(u256.Data)

        self.engine.EvaluationStack.PushT(hash)
        self.state_reader.Blockchain_GetTransactionHeight(self.engine)

        height = self.engine.EvaluationStack.Pop().GetBigInteger()

        self.assertEqual(height, -1)
コード例 #4
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 def setUp(self):
     self.engine = ExecutionEngine()
     self.econtext = ExecutionContext(Script(self.engine.Crypto, b''), 0)
     self.engine.InvocationStack.PushT(self.econtext)
     snapshot = GetBlockchain()._db.createSnapshot()
     self.state_reader = StateReader(TriggerType.Application, snapshot)
コード例 #5
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class InteropSerializeDeserializeTestCase(TestCase):

    engine = None
    econtext = None
    state_reader = None

    def setUp(self):
        self.engine = ExecutionEngine()
        self.econtext = ExecutionContext()
        self.state_reader = StateReader()

    def test_serialize_struct(self):

        my_struct = Struct([
            StackItem.New(12),
            StackItem.New(b'Hello World'),
            StackItem.New(True),
            Array([StackItem.New(113442),
                   StackItem.New(2),
                   StackItem.New(3)])
        ])
        self.engine.EvaluationStack.PushT(my_struct)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()
        self.assertIsInstance(deserialized, Struct)
        self.assertEqual(deserialized.Count, 4)
        self.assertEqual(deserialized.GetArray()[0], StackItem.New(12))
        self.assertEqual(deserialized.GetArray()[1],
                         StackItem.New(b'Hello World'))
        self.assertEqual(deserialized.GetArray()[2], StackItem.New(True))
        subarray = deserialized.GetArray()[3]
        self.assertIsInstance(subarray, Array)
        self.assertEqual(subarray.Count, 3)
        self.assertEqual(subarray.GetArray()[0], StackItem.New(113442))

    def test_serialize_array(self):

        my_array = Array([
            StackItem.New(12),
            StackItem.New(b'Hello World'),
            StackItem.New(True),
            Array([StackItem.New(113442),
                   StackItem.New(2),
                   StackItem.New(3)])
        ])
        self.engine.EvaluationStack.PushT(my_array)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()
        self.assertIsInstance(deserialized, Array)
        self.assertEqual(deserialized.Count, 4)
        self.assertEqual(deserialized.GetArray()[0], StackItem.New(12))
        self.assertEqual(deserialized.GetArray()[1],
                         StackItem.New(b'Hello World'))
        self.assertEqual(deserialized.GetArray()[2], StackItem.New(True))
        subarray = deserialized.GetArray()[3]
        self.assertIsInstance(subarray, Array)
        self.assertEqual(subarray.Count, 3)
        self.assertEqual(subarray.GetArray()[0], StackItem.New(113442))

    def test_serialize_bytearray(self):
        my_ba = StackItem.New(b'a0f03a')
        self.engine.EvaluationStack.PushT(my_ba)
        self.state_reader.Runtime_Serialize(self.engine)
        res = self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()
        self.assertEqual(deserialized.GetByteArray(), bytearray(b'a0f03a'))

        my_ba = StackItem.New(b'Hello Serialization')
        self.engine.EvaluationStack.PushT(my_ba)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()
        self.assertEqual(deserialized.GetByteArray(),
                         bytearray(b'Hello Serialization'))

        my_ba = StackItem.New(bytearray(b'\x01\x03\xfa\x99\x42'))
        self.engine.EvaluationStack.PushT(my_ba)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()
        self.assertEqual(deserialized.GetByteArray(),
                         bytearray(b'\x01\x03\xfa\x99\x42'))

    def test_serialize_bool(self):
        # create integer, serialize it via state reader
        my_bool = StackItem.New(True)
        self.engine.EvaluationStack.PushT(my_bool)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()
        self.assertIsInstance(deserialized, Boolean)
        self.assertEqual(deserialized.GetBoolean(), True)

        my_bool = StackItem.New(False)
        self.engine.EvaluationStack.PushT(my_bool)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()
        self.assertIsInstance(deserialized, Boolean)
        self.assertEqual(deserialized.GetBoolean(), False)

    def test_serialize_integer(self):

        # create integer, serialize it via state reader
        my_integer = StackItem.New(1234)
        self.engine.EvaluationStack.PushT(my_integer)
        self.state_reader.Runtime_Serialize(self.engine)
        self.assertEqual(len(self.engine.EvaluationStack.Items), 1)

        # we will preview what will be pushed onto the stack
        existing = self.engine.EvaluationStack.Peek(0)
        ms = StreamManager.GetStream(existing.GetByteArray())
        reader = BinaryReader(ms)
        result = StackItem.DeserializeStackItem(reader)

        # now run deserialized
        res = self.state_reader.Runtime_Deserialize(self.engine)
        self.assertEqual(res, True)

        deserialized = self.engine.EvaluationStack.Pop()

        self.assertEqual(deserialized, result)
        self.assertEqual(deserialized, my_integer)
        self.assertEqual(deserialized.GetBigInteger(), 1234)

    def test_serialize_negative_integer(self):

        # create integer, serialize it via state reader
        my_integer = StackItem.New(-12324345)
        self.engine.EvaluationStack.PushT(my_integer)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()

        #        self.assertEqual(deserialized, my_integer)
        self.assertEqual(deserialized.GetBigInteger(), -12324345)

    def test_serialize_big_integer(self):
        # create integer, serialize it via state reader
        my_integer = StackItem.New(23424324242424242424234)
        self.engine.EvaluationStack.PushT(my_integer)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()

        #        self.assertEqual(deserialized, my_integer)
        self.assertEqual(deserialized.GetBigInteger(), 23424324242424242424234)

    def test_serialize_zero(self):
        # create integer, serialize it via state reader
        my_integer = StackItem.New(0)
        self.engine.EvaluationStack.PushT(my_integer)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()
        self.assertEqual(deserialized.GetBigInteger(), 0)

    def test_serialize_map(self):
        map2 = Map({
            StackItem.New(b'a'): StackItem.New(1),
            StackItem.New(b'b'): StackItem.New(2),
            StackItem.New(b'c'): StackItem.New(3),
        })

        self.engine.EvaluationStack.PushT(map2)

        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()
        self.assertEqual(deserialized, map2)

        map3 = Map({
            StackItem.New(b'j'): StackItem.New(8),
            StackItem.New(b'k'): StackItem.New(2222),
        })

        map2.SetItem(StackItem.New(b'mymap'), map3)

        self.engine.EvaluationStack.PushT(map2)

        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.engine.EvaluationStack.Pop()
        self.assertEqual(deserialized, map2)

    @patch('logzero.logger.error')
    def test_cant_serialize_iop_item(self, mocked_logger):

        genesis = Blockchain.GenesisBlock()
        self.engine.EvaluationStack.PushT(StackItem.FromInterface(genesis))
        cant_do = self.state_reader.Runtime_Serialize(self.engine)
        self.assertEqual(cant_do, False)
        mocked_logger.assert_called_with(
            StringIn(
                'Cannot serialize item IOp Interface: <neo.Core.Block.Block object'
            ))

    @patch('logzero.logger.error')
    def test_cant_deserialize_item(self, mocked_logger):

        self.engine.EvaluationStack.PushT(StackItem.New(b'abc'))
        self.state_reader.Runtime_Deserialize(self.engine)
        item = self.engine.EvaluationStack.Pop()
        self.assertIsNone(item)
        mocked_logger.assert_called_with(
            StringIn('Could not deserialize stack item with type:'))
コード例 #6
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def GetStateReader():
    from neo.SmartContract.StateReader import StateReader
    return StateReader()
コード例 #7
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class InteropSerializeDeserializeTestCase(TestCase):
    engine = None
    econtext = None
    state_reader = None

    def setUp(self):
        self.engine = ExecutionEngine()
        self.econtext = ExecutionContext(engine=self.engine)
        self.state_reader = StateReader()

    def test_iter_array(self):
        my_array = Array([
            StackItem.New(12),
            StackItem.New(b'Hello World'),
            StackItem.New(True),
            Array([StackItem.New(113442),
                   StackItem.New(2),
                   StackItem.New(3)])
        ])
        self.econtext.EvaluationStack.PushT(my_array)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Enumerator_Create(self.engine)

        iterable = self.econtext.EvaluationStack.Peek(0).GetInterface()

        self.assertIsInstance(iterable, ArrayWrapper)

        keys = []
        values = []
        while iterable.Next():
            currentKey = iterable.Key()
            keys.append(currentKey.GetBigInteger())
            values.append(iterable.Value())

        self.assertEqual(keys, [0, 1, 2, 3])
        self.assertEqual(values, my_array.GetArray())

    def test_iter_map(self):
        my_map = Map({
            StackItem.New('a'): StackItem.New(1),
            StackItem.New('b'): StackItem.New(3),
            StackItem.New('d'): StackItem.New(432)
        })

        self.econtext.EvaluationStack.PushT(my_map)
        self.engine.InvocationStack.PushT(self.econtext)

        self.state_reader.Iterator_Create(self.engine)

        iterable = self.econtext.EvaluationStack.Peek(0).GetInterface()

        self.assertIsInstance(iterable, MapWrapper)

        keys = []
        values = []
        while iterable.Next():
            keys.append(iterable.Key())
            values.append(iterable.Value())

        self.assertEqual(
            keys, [StackItem.New('a'),
                   StackItem.New('b'),
                   StackItem.New('d')])
        self.assertEqual(keys, my_map.Keys)

        self.assertEqual(
            values, [StackItem.New(1),
                     StackItem.New(3),
                     StackItem.New(432)])
        self.assertEqual(values, my_map.Values)

    def test_iter_array_keys(self):
        my_array = Array([
            StackItem.New(12),
            StackItem.New(b'Hello World'),
            StackItem.New(True),
            Array([StackItem.New(113442),
                   StackItem.New(2),
                   StackItem.New(3)])
        ])
        self.econtext.EvaluationStack.PushT(my_array)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Enumerator_Create(self.engine)

        create_iterkeys = self.state_reader.Iterator_Keys(self.engine)

        self.assertEqual(create_iterkeys, True)

        iterkeys = self.econtext.EvaluationStack.Peek(0).GetInterface()

        self.assertIsInstance(iterkeys, KeysWrapper)

        keys = []
        while iterkeys.Next():
            keys.append(iterkeys.Value().GetBigInteger())

        self.assertEqual(keys, [0, 1, 2, 3])

    def test_iter_array_values(self):
        my_array = Array([
            StackItem.New(12),
            StackItem.New(b'Hello World'),
            StackItem.New(True),
            Array([StackItem.New(113442),
                   StackItem.New(2),
                   StackItem.New(3)])
        ])
        self.econtext.EvaluationStack.PushT(my_array)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Enumerator_Create(self.engine)

        create_itervalues = self.state_reader.Iterator_Values(self.engine)

        self.assertEqual(create_itervalues, True)

        itervals = self.econtext.EvaluationStack.Peek(0).GetInterface()

        self.assertIsInstance(itervals, ValuesWrapper)

        values = []
        while itervals.Next():
            values.append(itervals.Value())

        self.assertEqual(values, my_array.GetArray())

    def test_iter_concat(self):
        my_array = Array([
            StackItem.New(12),
            StackItem.New(b'Hello World'),
            StackItem.New(True),
            Array([StackItem.New(113442),
                   StackItem.New(2),
                   StackItem.New(3)])
        ])

        my_array2 = Array([
            StackItem.New(b'a'),
            StackItem.New(b'b'),
            StackItem.New(4),
            StackItem.New(100)
        ])

        self.econtext.EvaluationStack.PushT(my_array2)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Enumerator_Create(self.engine)

        self.econtext.EvaluationStack.PushT(my_array)

        self.state_reader.Enumerator_Create(self.engine)

        result = self.state_reader.Enumerator_Concat(self.engine)

        self.assertEqual(result, True)

        concatted_enum = self.econtext.EvaluationStack.Peek().GetInterface()

        self.assertIsInstance(concatted_enum, ConcatenatedEnumerator)

        values = []
        count = 0

        while concatted_enum.Next():
            count += 1
            values.append(concatted_enum.Value())

        self.assertEqual(count, 8)
        self.assertEqual(values, my_array.GetArray() + my_array2.GetArray())

    def test_iter_array_bad(self):
        my_item = StackItem.New(12)
        self.econtext.EvaluationStack.PushT(my_item)
        self.engine.InvocationStack.PushT(self.econtext)

        result = self.state_reader.Enumerator_Create(self.engine)

        self.assertEqual(result, False)
        self.assertEqual(self.econtext.EvaluationStack.Count, 0)

    def test_iter_map_bad(self):
        my_item = StackItem.New(12)
        self.econtext.EvaluationStack.PushT(my_item)
        self.engine.InvocationStack.PushT(self.econtext)
        result = self.state_reader.Iterator_Create(self.engine)

        self.assertEqual(result, False)
        self.assertEqual(self.econtext.EvaluationStack.Count, 0)

    def test_iter_array_key_bad(self):
        my_item = StackItem.New(12)
        self.econtext.EvaluationStack.PushT(my_item)
        self.engine.InvocationStack.PushT(self.econtext)

        result = self.state_reader.Iterator_Key(self.engine)

        self.assertEqual(result, False)
        self.assertEqual(self.econtext.EvaluationStack.Count, 0)

    def test_iter_array_values_bad(self):
        my_item = StackItem.New(12)
        self.econtext.EvaluationStack.PushT(my_item)
        self.engine.InvocationStack.PushT(self.econtext)

        result = self.state_reader.Iterator_Values(self.engine)

        self.assertEqual(result, False)
        self.assertEqual(self.econtext.EvaluationStack.Count, 0)

    def test_iter_array_keys_bad(self):

        my_item = StackItem.New(12)
        self.econtext.EvaluationStack.PushT(my_item)
        self.engine.InvocationStack.PushT(self.econtext)
        result = self.state_reader.Iterator_Keys(self.engine)

        self.assertEqual(result, False)
        self.assertEqual(self.econtext.EvaluationStack.Count, 0)
コード例 #8
0
class InteropSerializeDeserializeTestCase(NeoTestCase):
    engine = None
    econtext = None
    state_reader = None

    def setUp(self):
        self.engine = ExecutionEngine(crypto=Crypto.Default())
        self.econtext = ExecutionContext(Script(self.engine.Crypto, b''), 0)
        self.engine.InvocationStack.PushT(self.econtext)
        snapshot = GetBlockchain()._db.createSnapshot()
        self.state_reader = StateReader(TriggerType.Application, snapshot)

    def test_serialize_struct(self):
        my_struct = Struct([
            StackItem.New(12),
            StackItem.New(b'Hello World'),
            StackItem.New(True),
            Array([StackItem.New(113442),
                   StackItem.New(2),
                   StackItem.New(3)])
        ])
        self.econtext.EvaluationStack.PushT(my_struct)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()
        self.assertIsInstance(deserialized, Struct)
        self.assertEqual(deserialized.Count, 4)
        self.assertEqual(deserialized.GetArray()[0], StackItem.New(12))
        self.assertEqual(deserialized.GetArray()[1],
                         StackItem.New(b'Hello World'))
        self.assertEqual(deserialized.GetArray()[2], StackItem.New(True))
        subarray = deserialized.GetArray()[3]
        self.assertIsInstance(subarray, Array)
        self.assertEqual(subarray.Count, 3)
        self.assertEqual(subarray.GetArray()[0], StackItem.New(113442))

    def test_serialize_array(self):
        my_array = Array([
            StackItem.New(12),
            StackItem.New(b'Hello World'),
            StackItem.New(True),
            Array([StackItem.New(113442),
                   StackItem.New(2),
                   StackItem.New(3)])
        ])
        self.econtext.EvaluationStack.PushT(my_array)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()
        self.assertIsInstance(deserialized, Array)
        self.assertEqual(deserialized.Count, 4)
        self.assertEqual(deserialized.GetArray()[0], StackItem.New(12))
        self.assertEqual(deserialized.GetArray()[1],
                         StackItem.New(b'Hello World'))
        self.assertEqual(deserialized.GetArray()[2], StackItem.New(True))
        subarray = deserialized.GetArray()[3]
        self.assertIsInstance(subarray, Array)
        self.assertEqual(subarray.Count, 3)
        self.assertEqual(subarray.GetArray()[0], StackItem.New(113442))

    def test_serialize_bytearray(self):
        my_ba = StackItem.New(b'a0f03a')
        self.econtext.EvaluationStack.PushT(my_ba)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Runtime_Serialize(self.engine)
        res = self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()
        self.assertEqual(deserialized.GetByteArray(), bytearray(b'a0f03a'))

        my_ba = StackItem.New(b'Hello Serialization')
        self.econtext.EvaluationStack.PushT(my_ba)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()
        self.assertEqual(deserialized.GetByteArray(),
                         bytearray(b'Hello Serialization'))

        my_ba = StackItem.New(bytearray(b'\x01\x03\xfa\x99\x42'))
        self.econtext.EvaluationStack.PushT(my_ba)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()
        self.assertEqual(deserialized.GetByteArray(),
                         bytearray(b'\x01\x03\xfa\x99\x42'))

    def test_serialize_bool(self):
        # create integer, serialize it via state reader
        my_bool = StackItem.New(True)
        self.econtext.EvaluationStack.PushT(my_bool)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()
        self.assertIsInstance(deserialized, Boolean)
        self.assertEqual(deserialized.GetBoolean(), True)

        my_bool = StackItem.New(False)
        self.econtext.EvaluationStack.PushT(my_bool)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()
        self.assertIsInstance(deserialized, Boolean)
        self.assertEqual(deserialized.GetBoolean(), False)

    def test_serialize_integer(self):
        # create integer, serialize it via state reader
        my_integer = StackItem.New(1234)
        self.econtext.EvaluationStack.PushT(my_integer)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Runtime_Serialize(self.engine)
        self.assertEqual(len(self.econtext.EvaluationStack.Items), 1)

        # we will preview what will be pushed onto the stack
        existing = self.econtext.EvaluationStack.Peek(0)
        ms = StreamManager.GetStream(existing.GetByteArray())
        reader = BinaryReader(ms)
        result = StackItem.DeserializeStackItem(reader)

        # now run deserialized
        res = self.state_reader.Runtime_Deserialize(self.engine)
        self.assertEqual(res, True)

        deserialized = self.econtext.EvaluationStack.Pop()

        self.assertEqual(deserialized, result)
        self.assertEqual(deserialized, my_integer)
        self.assertEqual(deserialized.GetBigInteger(), 1234)

    def test_serialize_negative_integer(self):
        # create integer, serialize it via state reader
        my_integer = StackItem.New(-12324345)
        self.econtext.EvaluationStack.PushT(my_integer)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()

        #        self.assertEqual(deserialized, my_integer)
        self.assertEqual(deserialized.GetBigInteger(), -12324345)

    def test_serialize_big_integer(self):
        # create integer, serialize it via state reader
        my_integer = StackItem.New(23424324242424242424234)
        self.econtext.EvaluationStack.PushT(my_integer)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()

        #        self.assertEqual(deserialized, my_integer)
        self.assertEqual(deserialized.GetBigInteger(), 23424324242424242424234)

    def test_serialize_zero(self):
        # create integer, serialize it via state reader
        my_integer = StackItem.New(0)
        self.econtext.EvaluationStack.PushT(my_integer)
        self.engine.InvocationStack.PushT(self.econtext)
        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()
        self.assertEqual(deserialized.GetBigInteger(), 0)

    def test_serialize_map(self):
        map2 = Map({
            StackItem.New(b'a'): StackItem.New(1),
            StackItem.New(b'b'): StackItem.New(2),
            StackItem.New(b'c'): StackItem.New(3),
        })

        self.econtext.EvaluationStack.PushT(map2)
        self.engine.InvocationStack.PushT(self.econtext)

        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()
        self.assertEqual(deserialized, map2)

        map3 = Map({
            StackItem.New(b'j'): StackItem.New(8),
            StackItem.New(b'k'): StackItem.New(2222),
        })

        map2.SetItem(StackItem.New(b'mymap'), map3)

        self.econtext.EvaluationStack.PushT(map2)

        self.state_reader.Runtime_Serialize(self.engine)
        self.state_reader.Runtime_Deserialize(self.engine)

        deserialized = self.econtext.EvaluationStack.Pop()
        self.assertEqual(deserialized, map2)

    def test_cant_serialize_iop_item(self):
        genesis = Blockchain.GenesisBlock()
        self.econtext.EvaluationStack.PushT(StackItem.FromInterface(genesis))
        self.engine.InvocationStack.PushT(self.econtext)
        cant_do = self.state_reader.Runtime_Serialize(self.engine)
        self.assertEqual(cant_do, False)

    def test_cant_deserialize_item(self):
        self.econtext.EvaluationStack.PushT(StackItem.New(b'abc'))
        self.engine.InvocationStack.PushT(self.econtext)
        success = self.state_reader.Runtime_Deserialize(self.engine)
        self.assertFalse(success)