120 lines
3.2 KiB
Go
120 lines
3.2 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package rpc
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import (
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"encoding/json"
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"net"
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"testing"
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"time"
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"golang.org/x/net/context"
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)
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type NotificationTestService struct{}
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var (
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unsubCallbackCalled = false
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)
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func (s *NotificationTestService) Unsubscribe(subid string) {
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unsubCallbackCalled = true
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}
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func (s *NotificationTestService) SomeSubscription(ctx context.Context, n, val int) (Subscription, error) {
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notifier, supported := ctx.Value(NotifierContextKey).(Notifier)
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if !supported {
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return nil, ErrNotificationsUnsupported
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}
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// by explicitly creating an subscription we make sure that the subscription id is send back to the client
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// before the first subscription.Notify is called. Otherwise the events might be send before the response
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// for the eth_subscribe method.
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subscription, err := notifier.NewSubscription(s.Unsubscribe)
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if err != nil {
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return nil, err
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}
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go func() {
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for i := 0; i < n; i++ {
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if err := subscription.Notify(val + i); err != nil {
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return
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}
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}
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}()
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return subscription, nil
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}
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func TestNotifications(t *testing.T) {
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server := NewServer()
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service := &NotificationTestService{}
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if err := server.RegisterName("eth", service); err != nil {
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t.Fatalf("unable to register test service %v", err)
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}
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clientConn, serverConn := net.Pipe()
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go server.ServeCodec(NewJSONCodec(serverConn), OptionMethodInvocation|OptionSubscriptions)
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out := json.NewEncoder(clientConn)
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in := json.NewDecoder(clientConn)
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n := 5
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val := 12345
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request := map[string]interface{}{
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"id": 1,
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"method": "eth_subscribe",
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"version": "2.0",
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"params": []interface{}{"someSubscription", n, val},
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}
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// create subscription
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if err := out.Encode(request); err != nil {
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t.Fatal(err)
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}
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var subid string
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response := JSONSuccessResponse{Result: subid}
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if err := in.Decode(&response); err != nil {
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t.Fatal(err)
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}
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var ok bool
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if subid, ok = response.Result.(string); !ok {
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t.Fatalf("expected subscription id, got %T", response.Result)
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}
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for i := 0; i < n; i++ {
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var notification jsonNotification
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if err := in.Decode(¬ification); err != nil {
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t.Fatalf("%v", err)
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}
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if int(notification.Params.Result.(float64)) != val+i {
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t.Fatalf("expected %d, got %d", val+i, notification.Params.Result)
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}
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}
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clientConn.Close() // causes notification unsubscribe callback to be called
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time.Sleep(1 * time.Second)
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if !unsubCallbackCalled {
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t.Error("unsubscribe callback not called after closing connection")
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}
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}
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