message: gets NymRequestTests working
diff: @@ -36,7 +36,7 @@ namespace Hyperledger.Indy.Test.LedgerTests
  [TestMethod]
  public async Task TestBuildNymRequestWorksForOnlyOptionalFields()
  {
  - var verkey = "Anfh2rjAcxkE249DcdsaQl";
  + var verkey = VERKEY_TRUSTEE;
  var expectedResult = string.Format("\"identifier\":\"{0}\"," +
  "\"operation\":{{" +
  @@ -70,9 +70,10 @@ namespace Hyperledger.Indy.Test.LedgerTests
  var nymRequest = await Ledger.BuildNymRequestAsync(did, did, null, null, null);
  - var ex = await Assert.ThrowsExceptionAsync<InvalidLedgerTransactionException>(() =>
  - Ledger.SubmitRequestAsync(pool, nymRequest)
  - );
  + var result = await Ledger.SubmitRequestAsync(pool, nymRequest);
  +
  + Assert.IsTrue(result.Contains("\"op\":\"REQNACK\""), "expected REQNACK in {0}", result);
  + Assert.IsTrue(result.Contains("MissingSignature"), "expected CouldNotAuthenticate in {0}", result);
  }
  [TestMethod]
  @@ -137,13 +138,14 @@ namespace Hyperledger.Indy.Test.LedgerTests
  var nymRequest2 = await Ledger.BuildNymRequestAsync(myDid, myDid2, null, null, null);
  - var ex = await Assert.ThrowsExceptionAsync<InvalidLedgerTransactionException>(() =>
  - Ledger.SignAndSubmitRequestAsync(pool, wallet, myDid, nymRequest2)
  - );
  + var result = await Ledger.SignAndSubmitRequestAsync(pool, wallet, myDid, nymRequest2);
  +
  + Assert.IsTrue(result.Contains("\"op\":\"REQNACK\""), "expected REQNACK in {0}", result);
  + Assert.IsTrue(result.Contains("CouldNotAuthenticate"), "expected CouldNotAuthenticate in {0}", result);
  }
  [TestMethod]
  - public async Task TestSendNymRequestsWorksForUnknownSigner()
  + public async Task TestSendNymRequestsResultsInREQNACKForUnknownSigner()
  {
  var trusteeDidJson = "{\"seed\":\"000000000000000000000000Trustee9\"}";
  var trusteeDidResult = await Did.CreateAndStoreMyDidAsync(wallet, trusteeDidJson);
  @@ -153,10 +155,11 @@ namespace Hyperledger.Indy.Test.LedgerTests
  var myDid = myDidResult.Did;
  var nymRequest = await Ledger.BuildNymRequestAsync(trusteeDid, myDid, null, null, null);
  + var result = await Ledger.SignAndSubmitRequestAsync(pool, wallet, trusteeDid, nymRequest);
  +
  + Assert.IsTrue(result.Contains("\"op\":\"REQNACK\""), "expected REQNACK in {0}", result);
  + Assert.IsTrue(result.Contains("CouldNotAuthenticate"), "expected CouldNotAuthenticate in {0}", result);
  - var ex = await Assert.ThrowsExceptionAsync<InvalidLedgerTransactionException>(() =>
  - Ledger.SignAndSubmitRequestAsync(pool, wallet, trusteeDid, nymRequest)
  - );
  }
  [TestMethod]
  