From 3836dd0da5b4d6a4000c13c9bb2eae9a8da5dbf1 Mon Sep 17 00:00:00 2001
From: Balint Gabor <balint.g@gmail.com>
Date: Fri, 12 Jan 2018 09:53:34 +0100
Subject: [PATCH] Start unit testing for Streamer

---
 swarm/network/streamer_test.go | 134 +++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 swarm/network/streamer_test.go

diff --git a/swarm/network/streamer_test.go b/swarm/network/streamer_test.go
new file mode 100644
index 0000000000..ba9800232e
--- /dev/null
+++ b/swarm/network/streamer_test.go
@@ -0,0 +1,134 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package network
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/p2p"
+	"github.com/ethereum/go-ethereum/p2p/protocols"
+	p2ptest "github.com/ethereum/go-ethereum/p2p/testing"
+	"github.com/ethereum/go-ethereum/swarm/storage"
+)
+
+func init() {
+	log.Root().SetHandler(log.CallerFileHandler(log.LvlFilterHandler(log.LvlWarn, log.StreamHandler(os.Stderr, log.TerminalFormat(true)))))
+}
+
+// TODO: extract newStreamer
+func newStreamerTester(t *testing.T) (*p2ptest.ProtocolTester, *Streamer, func(), error) {
+	// setup
+	addr := RandomAddr() // tested peers peer address
+	to := NewKademlia(addr.OAddr, NewKadParams())
+
+	// temp datadir
+	datadir, err := ioutil.TempDir("", "streamer")
+	if err != nil {
+		return nil, nil, func() {}, err
+	}
+	teardown := func() {
+		os.RemoveAll(datadir)
+	}
+
+	localStore, err := storage.NewTestLocalStore(datadir)
+	if err != nil {
+		return nil, nil, teardown, err
+	}
+
+	dbAccess := NewDbAccess(localStore)
+	streamer := NewStreamer(to, dbAccess)
+
+	run := func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
+		bzzPeer := &bzzPeer{
+			Peer:      protocols.NewPeer(p, rw, StreamerSpec),
+			localAddr: addr,
+			BzzAddr:   NewAddrFromNodeID(p.ID()),
+		}
+		return streamer.Run(bzzPeer)
+	}
+
+	protocolTester := p2ptest.NewProtocolTester(t, NewNodeIDFromAddr(addr), 1, run)
+	return protocolTester, streamer, teardown, nil
+}
+
+// TODO
+// func newStreamer() (*Streamer, error) {
+//
+// }
+
+func TestStreamerSubscribe(t *testing.T) {
+	tester, streamer, teardown, err := newStreamerTester(t)
+	defer teardown()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = streamer.Subscribe(tester.IDs[0], "foo", nil, 0, 0, Top, true)
+	if err == nil || err.Error() != "stream foo not registered" {
+		t.Fatalf("Expected error %v, got %v", "stream foo not registered", err)
+	}
+}
+
+type testIncomingStreamer struct {
+	t []byte
+}
+
+func (self *testIncomingStreamer) NeedData([]byte) func() {
+	return nil
+}
+
+func (self *testIncomingStreamer) BatchDone(string, uint64, []byte, []byte) func() (*TakeoverProof, error) {
+	return nil
+}
+
+func TestStreamerRegisterIncoming(t *testing.T) {
+	// TODO: we only need streamer
+	tester, streamer, teardown, err := newStreamerTester(t)
+	defer teardown()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	streamer.RegisterIncomingStreamer("foo", func(p *StreamerPeer, t []byte) (IncomingStreamer, error) {
+		return &testIncomingStreamer{
+			t: t,
+		}, nil
+	})
+
+	tick := time.NewTicker(10 * time.Millisecond)
+	timeout := time.NewTimer(1 * time.Second)
+WAIT:
+	for {
+		select {
+		case <-tick.C:
+			if len(streamer.peers) > 0 {
+				break WAIT
+			}
+		case <-timeout.C:
+			t.Fatal("timeout")
+		}
+	}
+
+	err = streamer.Subscribe(tester.IDs[0], "foo", nil, 0, 0, Top, true)
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+}