migrate x/sync to p2p

Signed-off-by: Joshua Kim <20001595+joshua-kim@users.noreply.github.com>

Author: joshua-kim

network/p2p/p2ptest/client.go

@@ -0,0 +1,80 @@
+// Copyright (C) 2019-2024, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+
+package p2ptest
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/stretchr/testify/require"
+
+	"github.com/ava-labs/avalanchego/ids"
+	"github.com/ava-labs/avalanchego/network/p2p"
+	"github.com/ava-labs/avalanchego/snow/engine/common"
+	"github.com/ava-labs/avalanchego/snow/engine/enginetest"
+	"github.com/ava-labs/avalanchego/utils/logging"
+	"github.com/ava-labs/avalanchego/utils/set"
+)
+
+// NewClient generates a client-server pair and returns the client used to
+// communicate with a server with the specified handler
+func NewClient(t *testing.T, rootCtx context.Context, handler p2p.Handler) *p2p.Client {
+	clientSender := &enginetest.Sender{}
+	serverSender := &enginetest.Sender{}
+
+	clientNodeID := ids.GenerateTestNodeID()
+	clientNetwork, err := p2p.NewNetwork(logging.NoLog{}, clientSender, prometheus.NewRegistry(), "")
+	require.NoError(t, err)
+
+	serverNodeID := ids.GenerateTestNodeID()
+	serverNetwork, err := p2p.NewNetwork(logging.NoLog{}, serverSender, prometheus.NewRegistry(), "")
+	require.NoError(t, err)
+
+	clientSender.SendAppGossipF = func(ctx context.Context, _ common.SendConfig, gossipBytes []byte) error {
+		go func() {
+			require.NoError(t, serverNetwork.AppGossip(ctx, clientNodeID, gossipBytes))
+		}()
+
+		return nil
+	}
+
+	clientSender.SendAppRequestF = func(ctx context.Context, _ set.Set[ids.NodeID], requestID uint32, requestBytes []byte) error {
+		// Send the request asynchronously to avoid deadlock when the server
+		// sends the response back to the client
+		go func() {
+			require.NoError(t, serverNetwork.AppRequest(ctx, clientNodeID, requestID, time.Time{}, requestBytes))
+		}()
+
+		return nil
+	}
+
+	serverSender.SendAppResponseF = func(ctx context.Context, _ ids.NodeID, requestID uint32, responseBytes []byte) error {
+		go func() {
+			require.NoError(t, clientNetwork.AppResponse(ctx, serverNodeID, requestID, responseBytes))
+		}()
+
+		return nil
+	}
+
+	serverSender.SendAppErrorF = func(ctx context.Context, _ ids.NodeID, requestID uint32, errorCode int32, errorMessage string) error {
+		go func() {
+			require.NoError(t, clientNetwork.AppRequestFailed(ctx, serverNodeID, requestID, &common.AppError{
+				Code:    errorCode,
+				Message: errorMessage,
+			}))
+		}()
+
+		return nil
+	}
+
+	require.NoError(t, clientNetwork.Connected(rootCtx, clientNodeID, nil))
+	require.NoError(t, clientNetwork.Connected(rootCtx, serverNodeID, nil))
+	require.NoError(t, serverNetwork.Connected(rootCtx, clientNodeID, nil))
+	require.NoError(t, serverNetwork.Connected(rootCtx, serverNodeID, nil))
+
+	require.NoError(t, serverNetwork.AddHandler(0, handler))
+	return clientNetwork.NewClient(0)
+}

network/p2p/p2ptest/client_test.go

@@ -0,0 +1,110 @@
+// Copyright (C) 2019-2024, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+
+package p2ptest
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/ava-labs/avalanchego/ids"
+	"github.com/ava-labs/avalanchego/network/p2p"
+	"github.com/ava-labs/avalanchego/snow/engine/common"
+	"github.com/ava-labs/avalanchego/utils/set"
+)
+
+func TestNewClient_AppGossip(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+
+	appGossipChan := make(chan struct{})
+	testHandler := p2p.TestHandler{
+		AppGossipF: func(context.Context, ids.NodeID, []byte) {
+			close(appGossipChan)
+		},
+	}
+
+	client := NewClient(t, ctx, testHandler)
+	require.NoError(client.AppGossip(ctx, common.SendConfig{}, []byte("foobar")))
+	<-appGossipChan
+}
+
+func TestNewClient_AppRequest(t *testing.T) {
+	tests := []struct {
+		name        string
+		appResponse []byte
+		appErr      error
+		appRequestF func(ctx context.Context, client *p2p.Client, onResponse p2p.AppResponseCallback) error
+	}{
+		{
+			name:        "AppRequest - response",
+			appResponse: []byte("foobar"),
+			appRequestF: func(ctx context.Context, client *p2p.Client, onResponse p2p.AppResponseCallback) error {
+				return client.AppRequest(ctx, set.Of(ids.GenerateTestNodeID()), []byte("foo"), onResponse)
+			},
+		},
+		{
+			name: "AppRequest - error",
+			appErr: &common.AppError{
+				Code:    123,
+				Message: "foobar",
+			},
+			appRequestF: func(ctx context.Context, client *p2p.Client, onResponse p2p.AppResponseCallback) error {
+				return client.AppRequest(ctx, set.Of(ids.GenerateTestNodeID()), []byte("foo"), onResponse)
+			},
+		},
+		{
+			name:        "AppRequestAny - response",
+			appResponse: []byte("foobar"),
+			appRequestF: func(ctx context.Context, client *p2p.Client, onResponse p2p.AppResponseCallback) error {
+				return client.AppRequestAny(ctx, []byte("foo"), onResponse)
+			},
+		},
+		{
+			name: "AppRequestAny - error",
+			appErr: &common.AppError{
+				Code:    123,
+				Message: "foobar",
+			},
+			appRequestF: func(ctx context.Context, client *p2p.Client, onResponse p2p.AppResponseCallback) error {
+				return client.AppRequestAny(ctx, []byte("foo"), onResponse)
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			require := require.New(t)
+			ctx := context.Background()
+
+			appRequestChan := make(chan struct{})
+			testHandler := p2p.TestHandler{
+				AppRequestF: func(context.Context, ids.NodeID, time.Time, []byte) ([]byte, *common.AppError) {
+					if tt.appErr != nil {
+						return nil, &common.AppError{
+							Code:    123,
+							Message: tt.appErr.Error(),
+						}
+					}
+
+					return tt.appResponse, nil
+				},
+			}
+
+			client := NewClient(t, ctx, testHandler)
+			require.NoError(tt.appRequestF(
+				ctx,
+				client,
+				func(_ context.Context, _ ids.NodeID, responseBytes []byte, err error) {
+					require.ErrorIs(err, tt.appErr)
+					require.Equal(tt.appResponse, responseBytes)
+					close(appRequestChan)
+				},
+			))
+			<-appRequestChan
+		})
+	}
+}