def test_validation():
tx_in = TxIn(OutPoint("ff" * 32, 0), Script())
assert tx_in.is_valid()
tx_out = TxOut(10, Script())
assert tx_out.is_valid()
tx_in_valid = TxIn(OutPoint("ff" * 32, 0),
Script.from_hex("fffd" + "ff" * (256**2 - 3)))
assert tx_in_valid.is_valid()
tx_out_valid = TxOut(10, Script.from_hex("fffd" + "ff" * (256**2 - 3)))
assert tx_out_valid.is_valid()
tx_in_invalid = TxIn(OutPoint("ff" * 32, 0),
Script.from_hex("fffe" + "ff" * (256**2 - 2)))
assert not tx_in_invalid.is_valid()
tx_out_invalid = TxOut(10, Script.from_hex("fffe" + "ff" * (256**2 - 2)))
assert not tx_out_invalid.is_valid()
tx = Tx([tx_in_invalid], [tx_out_valid])
assert not tx.is_valid()
tx = Tx([tx_in_valid], [tx_out_invalid])
assert not tx.is_valid()
tx_in = TxIn(OutPoint("ff" * 32, 0), Script())
tx_out = TxOut(10, Script())
tx = Tx([tx_in], [tx_out])
assert tx.is_valid()
tx_in_2 = TxIn(OutPoint("ff" * 32, 0), Script())
tx = Tx([tx_in, tx_in_2], [tx_out])
assert not tx.is_valid()
def test_invalid_outpoint_index():
tx_in = TxIn(OutPoint("00" * 32, -1), Script())
assert not tx_in.is_valid()
tx_in = TxIn(OutPoint("00" * 32, 0xFFFF + 1), Script())
assert not tx_in.is_valid()