diff options
Diffstat (limited to 'test/functional/test_framework/script.py')
| -rw-r--r-- | test/functional/test_framework/script.py | 55 |
1 files changed, 39 insertions, 16 deletions
diff --git a/test/functional/test_framework/script.py b/test/functional/test_framework/script.py index 92725dfcf4..cc5f8307d3 100644 --- a/test/functional/test_framework/script.py +++ b/test/functional/test_framework/script.py @@ -1,5 +1,5 @@ #!/usr/bin/env python3 -# Copyright (c) 2015-2019 The Bitcoin Core developers +# Copyright (c) 2015-2020 The Bitcoin Core developers # Distributed under the MIT software license, see the accompanying # file COPYING or http://www.opensource.org/licenses/mit-license.php. """Functionality to build scripts, as well as signature hash functions. @@ -8,6 +8,8 @@ This file is modified from python-bitcoinlib. """ import hashlib import struct +import unittest +from typing import List, Dict from .messages import ( CTransaction, @@ -20,7 +22,7 @@ from .messages import ( ) MAX_SCRIPT_ELEMENT_SIZE = 520 -OPCODE_NAMES = {} +OPCODE_NAMES = {} # type: Dict[CScriptOp, str] def hash160(s): return hashlib.new('ripemd160', sha256(s)).digest() @@ -36,7 +38,7 @@ def bn2vch(v): # Serialize to bytes return encoded_v.to_bytes(n_bytes, 'little') -_opcode_instances = [] +_opcode_instances = [] # type: List[CScriptOp] class CScriptOp(int): """A single script opcode""" __slots__ = () @@ -97,7 +99,7 @@ class CScriptOp(int): return _opcode_instances[n] except IndexError: assert len(_opcode_instances) == n - _opcode_instances.append(super(CScriptOp, cls).__new__(cls, n)) + _opcode_instances.append(super().__new__(cls, n)) return _opcode_instances[n] # Populate opcode instance table @@ -372,7 +374,7 @@ class CScriptTruncatedPushDataError(CScriptInvalidError): """Invalid pushdata due to truncation""" def __init__(self, msg, data): self.data = data - super(CScriptTruncatedPushDataError, self).__init__(msg) + super().__init__(msg) # This is used, eg, for blockchain heights in coinbase scripts (bip34) @@ -449,15 +451,8 @@ class CScript(bytes): return other def __add__(self, other): - # Do the coercion outside of the try block so that errors in it are - # noticed. - other = self.__coerce_instance(other) - - try: - # bytes.__add__ always returns bytes instances unfortunately - return CScript(super(CScript, self).__add__(other)) - except TypeError: - raise TypeError('Can not add a %r instance to a CScript' % other.__class__) + # add makes no sense for a CScript() + raise NotImplementedError def join(self, iterable): # join makes no sense for a CScript() @@ -465,14 +460,14 @@ class CScript(bytes): def __new__(cls, value=b''): if isinstance(value, bytes) or isinstance(value, bytearray): - return super(CScript, cls).__new__(cls, value) + return super().__new__(cls, value) else: def coerce_iterable(iterable): for instance in iterable: yield cls.__coerce_instance(instance) # Annoyingly on both python2 and python3 bytes.join() always # returns a bytes instance even when subclassed. - return super(CScript, cls).__new__(cls, b''.join(coerce_iterable(value))) + return super().__new__(cls, b''.join(coerce_iterable(value))) def raw_iter(self): """Raw iteration @@ -715,3 +710,31 @@ def SegwitV0SignatureHash(script, txTo, inIdx, hashtype, amount): ss += struct.pack("<I", hashtype) return hash256(ss) + +class TestFrameworkScript(unittest.TestCase): + def test_bn2vch(self): + self.assertEqual(bn2vch(0), bytes([])) + self.assertEqual(bn2vch(1), bytes([0x01])) + self.assertEqual(bn2vch(-1), bytes([0x81])) + self.assertEqual(bn2vch(0x7F), bytes([0x7F])) + self.assertEqual(bn2vch(-0x7F), bytes([0xFF])) + self.assertEqual(bn2vch(0x80), bytes([0x80, 0x00])) + self.assertEqual(bn2vch(-0x80), bytes([0x80, 0x80])) + self.assertEqual(bn2vch(0xFF), bytes([0xFF, 0x00])) + self.assertEqual(bn2vch(-0xFF), bytes([0xFF, 0x80])) + self.assertEqual(bn2vch(0x100), bytes([0x00, 0x01])) + self.assertEqual(bn2vch(-0x100), bytes([0x00, 0x81])) + self.assertEqual(bn2vch(0x7FFF), bytes([0xFF, 0x7F])) + self.assertEqual(bn2vch(-0x8000), bytes([0x00, 0x80, 0x80])) + self.assertEqual(bn2vch(-0x7FFFFF), bytes([0xFF, 0xFF, 0xFF])) + self.assertEqual(bn2vch(0x80000000), bytes([0x00, 0x00, 0x00, 0x80, 0x00])) + self.assertEqual(bn2vch(-0x80000000), bytes([0x00, 0x00, 0x00, 0x80, 0x80])) + self.assertEqual(bn2vch(0xFFFFFFFF), bytes([0xFF, 0xFF, 0xFF, 0xFF, 0x00])) + self.assertEqual(bn2vch(123456789), bytes([0x15, 0xCD, 0x5B, 0x07])) + self.assertEqual(bn2vch(-54321), bytes([0x31, 0xD4, 0x80])) + + def test_cscriptnum_encoding(self): + # round-trip negative and multi-byte CScriptNums + values = [0, 1, -1, -2, 127, 128, -255, 256, (1 << 15) - 1, -(1 << 16), (1 << 24) - 1, (1 << 31), 1 - (1 << 32), 1 << 40, 1500, -1500] + for value in values: + self.assertEqual(CScriptNum.decode(CScriptNum.encode(CScriptNum(value))), value) |