@Test public void fourPeers() throws Exception { InboundMessageQueuer[] channels = { connectPeer(1), connectPeer(2), connectPeer(3), connectPeer(4) }; Transaction tx = new Transaction(params); TransactionBroadcast broadcast = new TransactionBroadcast(peerGroup, tx); ListenableFuture<Transaction> future = broadcast.broadcast(); assertFalse(future.isDone()); // We expect two peers to receive a tx message, and at least one of the others must announce for // the future to // complete successfully. Message[] messages = { (Message) outbound(channels[0]), (Message) outbound(channels[1]), (Message) outbound(channels[2]), (Message) outbound(channels[3]) }; // 0 and 3 are randomly selected to receive the broadcast. assertEquals(tx, messages[0]); assertEquals(tx, messages[3]); assertNull(messages[1]); assertNull(messages[2]); Threading.waitForUserCode(); assertFalse(future.isDone()); inbound(channels[1], InventoryMessage.with(tx)); pingAndWait(channels[1]); Threading.waitForUserCode(); assertTrue(future.isDone()); }