p2p: add test for base protocol disconnect

p2p/protocol_test.go

+package p2p
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestBaseProtocolDisconnect(t *testing.T) {
+	peer := NewPeer(NewSimpleClientIdentity("p1", "", "", "foo"), nil)
+	peer.ourID = NewSimpleClientIdentity("p2", "", "", "bar")
+	peer.pubkeyHook = func(*peerAddr) error { return nil }
+
+	rw1, rw2 := MsgPipe()
+	done := make(chan struct{})
+	go func() {
+		if err := expectMsg(rw2, handshakeMsg); err != nil {
+			t.Error(err)
+		}
+		err := rw2.EncodeMsg(handshakeMsg,
+			baseProtocolVersion,
+			"",
+			[]interface{}{},
+			0,
+			make([]byte, 64),
+		)
+		if err != nil {
+			t.Error(err)
+		}
+		if err := expectMsg(rw2, getPeersMsg); err != nil {
+			t.Error(err)
+		}
+		if err := rw2.EncodeMsg(discMsg, DiscQuitting); err != nil {
+			t.Error(err)
+		}
+		close(done)
+	}()
+
+	if err := runBaseProtocol(peer, rw1); err == nil {
+		t.Errorf("base protocol returned without error")
+	} else if reason, ok := err.(discRequestedError); !ok || reason != DiscQuitting {
+		t.Errorf("base protocol returned wrong error: %v", err)
+	}
+	<-done
+}
+
+func expectMsg(r MsgReader, code uint64) error {
+	msg, err := r.ReadMsg()
+	if err != nil {
+		return err
+	}
+	if err := msg.Discard(); err != nil {
+		return err
+	}
+	if msg.Code != code {
+		return fmt.Errorf("wrong message code: got %d, expected %d", msg.Code, code)
+	}
+	return nil
+}