@Test
    public void addressConstantIsConsistentWithNemesisBlock() {
      // Arrange:
      final Block block = this.loadNemesisBlock();
      final Address blockAddress = block.getSigner().getAddress();

      // Assert:
      Assert.assertThat(blockAddress, IsEqual.equalTo(NEMESIS_BLOCK_INFO.getAddress()));
      Assert.assertThat(
          blockAddress.getPublicKey(),
          IsEqual.equalTo(NEMESIS_BLOCK_INFO.getAddress().getPublicKey()));
      Assert.assertThat(blockAddress.getPublicKey(), IsNull.notNullValue());
    }
    @Test
    public void nemesisBlockIsVerifiable() {
      // Arrange:
      final Block block = this.loadNemesisBlock();

      // Assert:
      Assert.assertThat(block.verify(), IsEqual.equalTo(true));
    }
    @Test
    public void generationHashConstantIsConsistentWithNemesisBlock() {
      // Arrange:
      final Block block = this.loadNemesisBlock();

      // Assert:
      Assert.assertThat(
          block.getGenerationHash(), IsEqual.equalTo(NEMESIS_BLOCK_INFO.getGenerationHash()));
    }
    @Test
    public void nemesisTransactionsAreVerifiable() {
      // Arrange:
      final Block block = this.loadNemesisBlock();

      // Assert:
      for (final Transaction transaction : block.getTransactions()) {
        Assert.assertThat(transaction.verify(), IsEqual.equalTo(true));
      }
    }
    @Test
    public void nemesisBlockCanBeCreated() {
      // Act:
      final Block block = this.loadNemesisBlock();

      // Assert:
      Assert.assertThat(
          block.getSigner().getAddress(), IsEqual.equalTo(NEMESIS_BLOCK_INFO.getAddress()));
      Assert.assertThat(block.getType(), IsEqual.equalTo(-1));
      Assert.assertThat(block.getVersion(), IsEqual.equalTo(EXPECTED_VERSION));
      Assert.assertThat(block.getTimeStamp(), IsEqual.equalTo(TimeInstant.ZERO));

      // 2 multisig aggregate transactions
      Assert.assertThat(
          block.getTotalFee(), IsEqual.equalTo(EXPECTED_MULTISIG_AGGREGATE_FEE.multiply(2)));
      Assert.assertThat(block.getPreviousBlockHash(), IsEqual.equalTo(Hash.ZERO));
      Assert.assertThat(block.getHeight(), IsEqual.equalTo(BlockHeight.ONE));
      Assert.assertThat(block.getTransactions().size(), IsEqual.equalTo(NUM_NEMESIS_TRANSACTIONS));

      Assert.assertThat(block.getDifficulty(), IsEqual.equalTo(BlockDifficulty.INITIAL_DIFFICULTY));
      Assert.assertThat(block.getGenerationHash(), IsNull.notNullValue());
    }
    @Test
    public void nemesisTransactionsHaveCorrectFees() {
      // Arrange:
      final Block block = this.loadNemesisBlock();

      // Assert:
      for (final Transaction transaction : block.getTransactions()) {
        final Amount expectedFee =
            TransactionTypes.TRANSFER == transaction.getType()
                ? Amount.ZERO
                : NemGlobals.getTransactionFeeCalculator().calculateMinimumFee(transaction);
        Assert.assertThat(transaction.getFee(), IsEqual.equalTo(expectedFee));
      }
    }
    @Test
    public void amountConstantIsConsistentWithNemesisBlock() {
      // Act:
      Amount totalAmount = Amount.ZERO;
      final Block block = this.loadNemesisBlock();
      for (final Transaction transaction : block.getTransactions()) {
        if (transaction instanceof TransferTransaction) {
          totalAmount = totalAmount.add(((TransferTransaction) transaction).getAmount());
        }
      }

      // Assert:
      Assert.assertThat(totalAmount, IsEqual.equalTo(NEMESIS_BLOCK_INFO.getAmount()));
    }
    @Test
    public void nemesisTransactionSignersHavePublicKeys() {
      // Arrange:
      final Block block = this.loadNemesisBlock();

      // Act:
      final Set<Address> signerAddresses =
          block
              .getTransactions()
              .stream()
              .map(t -> t.getSigner().getAddress())
              .collect(Collectors.toSet());

      // Assert:
      for (final Address address : signerAddresses) {
        Assert.assertThat(address.getPublicKey(), IsNull.notNullValue());
      }
    }
    @Test
    public void nemesisAddressesAreValid() {
      // Arrange:
      final Block block = this.loadNemesisBlock();

      // Act:
      final Set<Address> allAddresses =
          block
              .getTransactions()
              .stream()
              .flatMap(t -> t.getAccounts().stream().map(Account::getAddress))
              .collect(Collectors.toSet());

      // Assert:
      for (final Address address : allAddresses) {
        Assert.assertThat(address.toString(), address.isValid(), IsEqual.equalTo(true));
      }
    }