def test_validate_existing_link_public_key(self):
# Arrange
db = MockDatabase()
(block1, block2, block3, _) = TestBlocks.setup_validate()
db.add_block(block1)
db.add_block(block2)
db.add_block(block3)
# Act
block2 = TrustChainBlock(block2.pack_db_insert())
block2.link_public_key = EMPTY_PK
block2.sign(db.get(block2.public_key, block2.sequence_number).key)
result = block2.validate(db)
# Assert
self.assertEqual(result[0], ValidationResult.invalid)
self.assertIn('Linked public key is not valid', result[1])
def test_validate_existing_hash(self):
# Arrange
db = MockDatabase()
(block1, block2, block3, _) = TestBlocks.setup_validate()
db.add_block(block1)
db.add_block(block2)
db.add_block(block3)
# Act
block2 = TrustChainBlock(block2.pack_db_insert())
block2.previous_hash = sha256(str(random.randint(0, 100000))).digest()
block2.sign(db.get(block2.public_key, block2.sequence_number).key)
result = block2.validate(db)
# Assert
self.assertEqual(result[0], ValidationResult.invalid)
self.assertIn(
'Previous hash is not equal to the hash id of the previous block',
result[1])
