def test_json_encoding():
bcv = BlockChainView()
j = bcv.as_json()
assert j == '[]'
for size in (30, 100, 750):
bcv = make_bcv(30)
bcv.winnow()
j = bcv.as_json()
bcv1 = BlockChainView.from_json(j)
assert bcv1.node_tuples == bcv.node_tuples
def test_block_locator_hashes():
for size in [100, 500, 720, 1000]:
headers = make_headers(size)
nodes = [(i, headers[i].hash(), i) for i in range(size)]
bcv = BlockChainView(nodes)
blh = bcv.block_locator_hashes()
tuples = [bcv.tuple_for_hash(h) for h in blh]
indices = [t[0] for t in tuples]
indices.sort()
assert indices == sorted(bcv.key_index_generator())
bcv.winnow()
blh = bcv.block_locator_hashes()
tuples = [bcv.tuple_for_hash(h) for h in blh]
indices = [t[0] for t in tuples]
indices.sort()
assert indices == list(t[0] for t in bcv.node_tuples)
def make_bcv(node_count):
headers = make_headers(node_count)
nodes = ((i, header.hash(), i) for i, header in enumerate(headers))
return BlockChainView(nodes)
def test1():
bcv = BlockChainView()
assert bcv.last_block_index() == -1
assert bcv.block_locator_hashes() == [b'\0' * 32]
blocks = make_blocks(20)
