From 64681214f42d9c89f765256a6fb22d9669b23ae1 Mon Sep 17 00:00:00 2001
From: Olaoluwa Osuntokun <laolu32@gmail.com>
Date: Wed, 12 Sep 2018 20:59:20 -0700
Subject: [PATCH] lnwallet: add test to execrise unconfirmed transcations
 notified by SubscribeTransactions

In this commit, we add a new test to ensure that all backends will
properly send out notifications when an unconfirmed transcation that we
send is inserted into the tx store. Before we updated the btcwallet
build commit in dep, this would fail for neutrino but now passes.
---
 lnwallet/interface_test.go | 39 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/lnwallet/interface_test.go b/lnwallet/interface_test.go
index b19e74faa..e69fba9c9 100644
--- a/lnwallet/interface_test.go
+++ b/lnwallet/interface_test.go
@@ -1270,6 +1270,45 @@ func testTransactionSubscriptions(miner *rpctest.Harness,
 		t.Fatalf("transactions not received after 5 seconds")
 	case <-confirmedNtfns: // Fall through on success
 	}
+
+	// We'll also ensure that the client is able to send our new
+	// notifications when we _create_ transactions ourselves that spend our
+	// own outputs.
+	b := txscript.NewScriptBuilder()
+	b.AddOp(txscript.OP_0)
+	outputScript, err := b.Script()
+	if err != nil {
+		t.Fatalf("unable to make output script: %v", err)
+	}
+	burnOutput := wire.NewTxOut(outputAmt, outputScript)
+	txid, err := alice.SendOutputs([]*wire.TxOut{burnOutput}, 2500)
+	if err != nil {
+		t.Fatalf("unable to create burn tx: %v", err)
+	}
+	err = waitForMempoolTx(miner, txid)
+	if err != nil {
+		t.Fatalf("tx not relayed to miner: %v", err)
+	}
+
+	// Before we mine the next block, we'll ensure that the above
+	// transaction shows up in the set of unconfirmed transactions returned
+	// by ListTransactionDetails.
+	err = waitForWalletSync(miner, alice)
+	if err != nil {
+		t.Fatalf("Couldn't sync Alice's wallet: %v", err)
+	}
+
+	// As we just sent the transaction and it was landed in the mempool, we
+	// should get a notification for a new unconfirmed transactions
+	select {
+	case <-time.After(time.Second * 10):
+		t.Fatalf("transactions not received after 10 seconds")
+	case unConfTx := <-txClient.UnconfirmedTransactions():
+		if unConfTx.Hash != *txid {
+			t.Fatalf("wrong txn notified: expected %v got %v",
+				txid, unConfTx.Hash)
+		}
+	}
 }
 
 // testPublishTransaction checks that PublishTransaction returns the