1 files changed, 104 insertions, 0 deletions
diff --git a/swarm/network/simulation/http_test.go b/swarm/network/simulation/http_test.go
new file mode 100644
index 000000000..4d8bf9946
--- /dev/null
+++ b/swarm/network/simulation/http_test.go
@@ -0,0 +1,104 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package simulation
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/node"
+	"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
+)
+
+func TestSimulationWithHTTPServer(t *testing.T) {
+	log.Debug("Init simulation")
+
+	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+	defer cancel()
+
+	sim := New(
+		map[string]ServiceFunc{
+			"noop": func(_ *adapters.ServiceContext, b *sync.Map) (node.Service, func(), error) {
+				return newNoopService(), nil, nil
+			},
+		}).WithServer(DefaultHTTPSimAddr)
+	defer sim.Close()
+	log.Debug("Done.")
+
+	_, err := sim.AddNode()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	log.Debug("Starting sim round and let it time out...")
+	//first test that running without sending to the channel will actually
+	//block the simulation, so let it time out
+	result := sim.Run(ctx, func(ctx context.Context, sim *Simulation) error {
+		log.Debug("Just start the sim without any action and wait for the timeout")
+		//ensure with a Sleep that simulation doesn't terminate before the timeout
+		time.Sleep(2 * time.Second)
+		return nil
+	})
+
+	if result.Error != nil {
+		if result.Error.Error() == "context deadline exceeded" {
+			log.Debug("Expected timeout error received")
+		} else {
+			t.Fatal(result.Error)
+		}
+	}
+
+	//now run it again and send the expected signal on the waiting channel,
+	//then close the simulation
+	log.Debug("Starting sim round and wait for frontend signal...")
+	//this time the timeout should be long enough so that it doesn't kick in too early
+	ctx, cancel2 := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel2()
+	go sendRunSignal(t)
+	result = sim.Run(ctx, func(ctx context.Context, sim *Simulation) error {
+		log.Debug("This run waits for the run signal from `frontend`...")
+		//ensure with a Sleep that simulation doesn't terminate before the signal is received
+		time.Sleep(2 * time.Second)
+		return nil
+	})
+	if result.Error != nil {
+		t.Fatal(result.Error)
+	}
+	log.Debug("Test terminated successfully")
+}
+
+func sendRunSignal(t *testing.T) {
+	//We need to first wait for the sim HTTP server to start running...
+	time.Sleep(2 * time.Second)
+	//then we can send the signal
+
+	log.Debug("Sending run signal to simulation: POST /runsim...")
+	resp, err := http.Post(fmt.Sprintf("http://localhost%s/runsim", DefaultHTTPSimAddr), "application/json", nil)
+	if err != nil {
+		t.Fatalf("Request failed: %v", err)
+	}
+	defer resp.Body.Close()
+	log.Debug("Signal sent")
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("err %s", resp.Status)
+	}
+}