mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
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c213fd1fd8
There is no need to depend on the old context package now that the minimum Go version is 1.7. The move to "context" eliminates our weird vendoring setup. Some vendored code still uses golang.org/x/net/context and it is now vendored in the normal way. This change triggered new vet checks around context.WithTimeout which didn't fire with golang.org/x/net/context.
165 lines
4.3 KiB
Go
165 lines
4.3 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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"context"
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"encoding/json"
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"net"
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"sync"
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"testing"
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"time"
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)
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type NotificationTestService struct {
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mu sync.Mutex
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unsubscribed bool
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gotHangSubscriptionReq chan struct{}
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unblockHangSubscription chan struct{}
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}
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func (s *NotificationTestService) Echo(i int) int {
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return i
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}
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func (s *NotificationTestService) wasUnsubCallbackCalled() bool {
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s.mu.Lock()
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defer s.mu.Unlock()
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return s.unsubscribed
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}
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func (s *NotificationTestService) Unsubscribe(subid string) {
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s.mu.Lock()
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s.unsubscribed = true
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s.mu.Unlock()
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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 := NotifierFromContext(ctx)
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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 := notifier.CreateSubscription()
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go func() {
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// test expects n events, if we begin sending event immediately some events
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// will probably be dropped since the subscription ID might not be send to
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// the client.
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time.Sleep(5 * time.Second)
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for i := 0; i < n; i++ {
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if err := notifier.Notify(subscription.ID, val+i); err != nil {
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return
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}
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}
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select {
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case <-notifier.Closed():
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s.mu.Lock()
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s.unsubscribed = true
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s.mu.Unlock()
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case <-subscription.Err():
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s.mu.Lock()
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s.unsubscribed = true
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s.mu.Unlock()
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}
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}()
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return subscription, nil
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}
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// HangSubscription blocks on s.unblockHangSubscription before
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// sending anything.
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func (s *NotificationTestService) HangSubscription(ctx context.Context, val int) (*Subscription, error) {
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notifier, supported := NotifierFromContext(ctx)
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if !supported {
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return nil, ErrNotificationsUnsupported
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}
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s.gotHangSubscriptionReq <- struct{}{}
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<-s.unblockHangSubscription
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subscription := notifier.CreateSubscription()
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go func() {
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notifier.Notify(subscription.ID, val)
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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 _, 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 !service.wasUnsubCallbackCalled() {
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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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