def test_is_valid_bad_difficulty(self):
self.block.difficulty = 10
# Set correct number of leading zeros to prevent pow error and ensure testing difficulty deviation.
self.block.hash = "0" * self.block.difficulty
with self.assertRaises(DifficultyDeviationError):
Block.is_valid(self.previous_block, self.block)
def test_is_valid_bad_pow(self):
self.block.hash = "fff"
with self.assertRaises(ProofOfWorkError):
Block.is_valid(self.previous_block, self.block)
def test_is_valid(self):
# Block is valid if no exception is thrown
Block.is_valid(self.previous_block, self.block)
def test_is_valid_bad_previous_hash(self):
# Set bad previous hash
self.block.previous_hash = "Bad"
with self.assertRaises(PreviousHashError):
Block.is_valid(self.previous_block, self.block)
def test_is_valid_bad_hash(self):
self.block.hash = "0" * self.block.difficulty + "dgfsdgfsgdfsgf"
with self.assertRaises(HashError):
Block.is_valid(self.previous_block, self.block)
