def test_difficulty_when_block_mined_too_quickly(self):
previous_block = Block.mine(self.previous_block, "Ethereum")
# New block mined immediately, quicker than the MINE_RATE.
mined_block = Block.mine(previous_block, "Verge")
# Assert that difficulty has increased by increment of one
self.assertEqual(mined_block.difficulty, previous_block.difficulty + 1)
def test_difficulty_when_block_mined_too_slowly(self):
previous_block = Block.mine(self.previous_block, "TRX")
time.sleep(MINE_RATE / SECOND)
# New block mined too slowly, slower that the MINE_RATE.
mined_block = Block.mine(previous_block, "Stellar")
# Assert that difficulty has decreased by increment of one
self.assertEqual(mined_block.difficulty, previous_block.difficulty - 1)
def test_mine_block_difficulty_not_less_than_1(self):
previous_block = Block.mine(self.previous_block, "Dragonchain")
# Ensure previous block difficulty is 1
previous_block.difficulty = 1
time.sleep(MINE_RATE / SECOND)
# New block mined too slowly, slower that the MINE_RATE.
mined_block = Block.mine(previous_block, "Some more data")
# Assert than even though the block mined slowly,
# the difficulty is not decreased as it cannot be less than 1
self.assertEqual(mined_block.difficulty, 1)
def test_mine(self):
result = Block.mine(self.previous_block, "Bitcoin")
self.assertIsInstance(result, Block)
self.assertEqual(result.data, "Bitcoin")
self.assertEqual(result.previous_hash, self.previous_block.hash)
self.assertEqual(result.hash[0:result.difficulty],
"0" * result.difficulty)
def setUp(self):
self.previous_block = Block.genesis()
self.block = Block.mine(self.previous_block, "SHUcoin")
