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104 lines
3.3 KiB
104 lines
3.3 KiB
// Copyright 2018 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 simulation
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import (
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"context"
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"fmt"
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"net/http"
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"sync"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
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)
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func TestSimulationWithHTTPServer(t *testing.T) {
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log.Debug("Init simulation")
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ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
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defer cancel()
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sim := New(
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map[string]ServiceFunc{
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"noop": func(_ *adapters.ServiceContext, b *sync.Map) (node.Service, func(), error) {
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return newNoopService(), nil, nil
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},
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}).WithServer(DefaultHTTPSimAddr)
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defer sim.Close()
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log.Debug("Done.")
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_, err := sim.AddNode()
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if err != nil {
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t.Fatal(err)
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}
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log.Debug("Starting sim round and let it time out...")
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//first test that running without sending to the channel will actually
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//block the simulation, so let it time out
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result := sim.Run(ctx, func(ctx context.Context, sim *Simulation) error {
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log.Debug("Just start the sim without any action and wait for the timeout")
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//ensure with a Sleep that simulation doesn't terminate before the timeout
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time.Sleep(2 * time.Second)
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return nil
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})
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if result.Error != nil {
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if result.Error.Error() == "context deadline exceeded" {
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log.Debug("Expected timeout error received")
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} else {
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t.Fatal(result.Error)
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}
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}
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//now run it again and send the expected signal on the waiting channel,
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//then close the simulation
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log.Debug("Starting sim round and wait for frontend signal...")
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//this time the timeout should be long enough so that it doesn't kick in too early
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ctx, cancel2 := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel2()
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go sendRunSignal(t)
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result = sim.Run(ctx, func(ctx context.Context, sim *Simulation) error {
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log.Debug("This run waits for the run signal from `frontend`...")
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//ensure with a Sleep that simulation doesn't terminate before the signal is received
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time.Sleep(2 * time.Second)
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return nil
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})
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if result.Error != nil {
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t.Fatal(result.Error)
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}
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log.Debug("Test terminated successfully")
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}
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func sendRunSignal(t *testing.T) {
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//We need to first wait for the sim HTTP server to start running...
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time.Sleep(2 * time.Second)
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//then we can send the signal
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log.Debug("Sending run signal to simulation: POST /runsim...")
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resp, err := http.Post(fmt.Sprintf("http://localhost%s/runsim", DefaultHTTPSimAddr), "application/json", nil)
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if err != nil {
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t.Fatalf("Request failed: %v", err)
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}
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defer resp.Body.Close()
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log.Debug("Signal sent")
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if resp.StatusCode != http.StatusOK {
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t.Fatalf("err %s", resp.Status)
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}
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}
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