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test: fix confusing off-by-one nValue in feature_coinstatsindex.py

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Due to evil floating-point arithmetic, the creation of one of the
transaction outputs in feature_coinstatsindex.py leads to it's nValue
being off by one satoshi: the Python expression `int(21.99 * COIN)`
doesn't yield 2199000000 as expected, but 2198999999.

This makes the test more confusing than necessary (w.r.t. the expected
`gettxoutsetinfo` values), and could also cause problems if the value
is ever changed. Fix by using a `Decimal` type for specifying the
value in BTC, rather than using a bare floating-point.
This commit is contained in:
Sebastian Falbesoner 2021-09-19 20:01:45 +02:00
parent de2af19dc8
commit ebe49b5b7c
1 changed files with 6 additions and 6 deletions
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12
test/functional/feature_coinstatsindex.py
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@ -164,7 +164,7 @@ class CoinStatsIndexTest(BitcoinTestFramework):
# Generate and send another tx with an OP_RETURN output (which is unspendable)
tx2 = CTransaction()
tx2.vin.append(CTxIn(COutPoint(int(tx1_txid, 16), n), b''))
tx2.vout.append(CTxOut(int(20.99 * COIN), CScript([OP_RETURN] + [OP_FALSE]*30)))
tx2.vout.append(CTxOut(int(Decimal('20.99') * COIN), CScript([OP_RETURN] + [OP_FALSE]*30)))
tx2_hex = self.nodes[0].signrawtransactionwithwallet(tx2.serialize().hex())['hex']
self.nodes[0].sendrawtransaction(tx2_hex)
@ -175,16 +175,16 @@ class CoinStatsIndexTest(BitcoinTestFramework):
for hash_option in index_hash_options:
# Check all amounts were registered correctly
res6 = index_node.gettxoutsetinfo(hash_option, 108)
assert_equal(res6['total_unspendable_amount'], Decimal('70.98999999'))
assert_equal(res6['total_unspendable_amount'], Decimal('70.99000000'))
assert_equal(res6['block_info'], {
'unspendable': Decimal('20.98999999'),
'unspendable': Decimal('20.99000000'),
'prevout_spent': 111,
'new_outputs_ex_coinbase': Decimal('89.99993620'),
'coinbase': Decimal('50.01006381'),
'coinbase': Decimal('50.01006380'),
'unspendables': {
'genesis_block': 0,
'bip30': 0,
'scripts': Decimal('20.98999999'),
'scripts': Decimal('20.99000000'),
'unclaimed_rewards': 0
}
})
@ -206,7 +206,7 @@ class CoinStatsIndexTest(BitcoinTestFramework):
for hash_option in index_hash_options:
res7 = index_node.gettxoutsetinfo(hash_option, 109)
assert_equal(res7['total_unspendable_amount'], Decimal('80.98999999'))
assert_equal(res7['total_unspendable_amount'], Decimal('80.99000000'))
assert_equal(res7['block_info'], {
'unspendable': 10,
'prevout_spent': 0,