def test_count_blocks(signed_create_tx):
from bigchaindb.backend import connect, query
from bigchaindb.models import Block
conn = connect()
assert query.count_blocks(conn) == 0
# create and insert some blocks
block = Block(transactions=[signed_create_tx])
conn.db.bigchain.insert_one(block.to_dict())
assert query.count_blocks(conn) == 1
def test_get_last_block(self, b):
from bigchaindb.backend import query
# get the number of blocks
num_blocks = query.count_blocks(b.connection)
# get the last block
last_block = b.get_last_block()
assert last_block['block']['block_number'] == num_blocks - 1
def test_double_create(b, user_pk):
from bigchaindb.models import Transaction
from bigchaindb.backend.query import count_blocks
tx = Transaction.create([b.me], [([user_pk], 1)],
metadata={'test': 'test'}).sign([b.me_private])
b.write_transaction(tx)
time.sleep(5)
b.write_transaction(tx)
time.sleep(5)
tx_returned = b.get_transaction(tx.id)
# test that the tx can be queried
assert tx_returned == tx
# test the transaction appears only once
last_voted_block = b.get_last_voted_block()
assert len(last_voted_block.transactions) == 1
assert count_blocks(b.connection) == 2