message: expect failure but different
diff: @@ -9,6 +9,7 @@ import org.json.JSONObject;
  import org.junit.Test;
  import org.json.JSONArray;
  +import java.util.concurrent.CompletableFuture;
  import java.util.concurrent.ExecutionException;
  import static org.hamcrest.CoreMatchers.isA;
  @@ -83,10 +84,9 @@ public class PackUnpackMessageTest extends IndyIntegrationTestWithSingleWallet {
  thrown.expect(ExecutionException.class);
  thrown.expectCause(isA(InvalidStructureException.class));
  - Crypto.unpackMessage(wallet, packedMessage.getBytes()).get();
  + CompletableFuture<byte[]> future = Crypto.unpackMessage(wallet, packedMessage.getBytes());
  - // this assert should never trigger since unpackMessage should throw exception
  - assertTrue(false);
  + assertTrue(future.isCompletedExceptionally());
  }
  @Test
  