def test_adjust_difficulty_limits_at_1():
last_block = Block(time.time_ns(), "test_previous_hash", "test_hash",
"test_data", 1, 0)
time.sleep(MINE_RATE / SECONDS)
mined_block = Block.mine(last_block, "bar")
assert mined_block.difficulty == 1
def test_mine():
previous_block = Block.genesis()
data = "test data"
block = Block.mine(previous_block, data)
assert isinstance(block, Block)
assert block.data == data
assert hex_to_binary(
block.hash)[0:block.difficulty] == "0" * block.difficulty
def add_block(self, data):
self.chain.append(Block.mine(self.chain[-1], data))
def block(prev_block):
return Block.mine(prev_block, "foo")
def test_adjust_difficulty_fast_mining():
last_block = Block.mine(Block.genesis(), "foo")
time.sleep(MINE_RATE / SECONDS)
mined_block = Block.mine(last_block, "bar")
assert mined_block.difficulty == last_block.difficulty - 1
def test_adjust_difficulty_slow_mining():
last_block = Block.mine(Block.genesis(), "foo")
mined_block = Block.mine(last_block, "bar")
assert mined_block.difficulty == last_block.difficulty + 1