message: Clarify message test
diff: @@ -7,6 +7,9 @@ import { KeyPair } from '../../../../src/coin/hbar/keyPair';
  describe('Hbar Transaction', () => {
  const coin = coins.get('thbar');
  + /**
  + *
  + */
  function getTransaction(): Transaction {
  return new Transaction(coin);
  }
  @@ -21,7 +24,7 @@ describe('Hbar Transaction', () => {
  });
  });
  - describe('should sign', () => {
  + describe('should sign if transaction is', () => {
  it('invalid', function() {
  const tx = getTransaction();
  return tx.sign(testData.INVALID_KEYPAIR_PRV).should.be.rejected();
  @@ -58,7 +61,6 @@ describe('Hbar Transaction', () => {
  testData.OPERATOR.publicKey.slice(24),
  );
  });
  -
  });
  describe('should return encoded tx', function() {
  