test: add transport layer (#97)

The purpose of transport layer is to abstract the way to send messages and setup connections between peers in a p2p network. The peer discovery is simulated by a hosted server: every peer sends its address to a known server. Once collecting enough peers, respond the whole peers lists to all peers.

Changes:
- Add test.Trasnport interface
- Add test.Transport implementation by golang channel.
- Add test.transport implementation by TCP connection.
- Move LatencyModel to core/test package
- Add Marshaller interface

1 files changed, 2 insertions, 2 deletions

diff --git a/cmd/dexcon-simulation-with-scheduler/main.go b/cmd/dexcon-simulation-with-scheduler/main.go
index d1d815a..0684a0d 100644
--- a/cmd/dexcon-simulation-with-scheduler/main.go
+++ b/cmd/dexcon-simulation-with-scheduler/main.go
@@ -44,11 +44,11 @@ func main() {
 		log.Fatal("unable to read config: ", err)
 	}
 	// Setup latencies, validators.
-	networkLatency := &integration.NormalLatencyModel{
+	networkLatency := &test.NormalLatencyModel{
 		Sigma: cfg.Networking.Sigma,
 		Mean:  cfg.Networking.Mean,
 	}
-	proposingLatency := &integration.NormalLatencyModel{
+	proposingLatency := &test.NormalLatencyModel{
 		Sigma: cfg.Validator.Legacy.ProposeIntervalSigma,
 		Mean:  cfg.Validator.Legacy.ProposeIntervalMean,
 	}