path: root/swarm/testutil/http.go

// Copyright 2017 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 testutil

import (
    "io/ioutil"
    "net/http"
    "net/http/httptest"
    "os"
    "testing"
    "time"

    "github.com/ethereum/go-ethereum/metrics"
    "github.com/ethereum/go-ethereum/metrics/influxdb"
    "github.com/ethereum/go-ethereum/swarm/api"
    "github.com/ethereum/go-ethereum/swarm/storage"
    "github.com/ethereum/go-ethereum/swarm/storage/mru"
)

type TestServer interface {
    ServeHTTP(http.ResponseWriter, *http.Request)
}

// simulated timeProvider
type fakeTimeProvider struct {
    currentTime uint64
}

func (f *fakeTimeProvider) Tick() {
    f.currentTime++
}

func (f *fakeTimeProvider) Now() mru.Timestamp {
    return mru.Timestamp{Time: f.currentTime}
}

func NewTestSwarmServer(t *testing.T, serverFunc func(*api.API) TestServer) *TestSwarmServer {
    dir, err := ioutil.TempDir("", "swarm-storage-test")
    if err != nil {
        t.Fatal(err)
    }
    storeparams := storage.NewDefaultLocalStoreParams()
    storeparams.DbCapacity = 5000000
    storeparams.CacheCapacity = 5000
    storeparams.Init(dir)
    localStore, err := storage.NewLocalStore(storeparams, nil)
    if err != nil {
        os.RemoveAll(dir)
        t.Fatal(err)
    }
    fileStore := storage.NewFileStore(localStore, storage.NewFileStoreParams())

    // mutable resources test setup
    resourceDir, err := ioutil.TempDir("", "swarm-resource-test")
    if err != nil {
        t.Fatal(err)
    }

    fakeTimeProvider := &fakeTimeProvider{
        currentTime: 42,
    }
    mru.TimestampProvider = fakeTimeProvider
    rhparams := &mru.HandlerParams{}
    rh, err := mru.NewTestHandler(resourceDir, rhparams)
    if err != nil {
        t.Fatal(err)
    }

    a := api.NewAPI(fileStore, nil, rh.Handler)
    srv := httptest.NewServer(serverFunc(a))
    return &TestSwarmServer{
        Server:            srv,
        FileStore:         fileStore,
        dir:               dir,
        Hasher:            storage.MakeHashFunc(storage.DefaultHash)(),
        timestampProvider: fakeTimeProvider,
        cleanup: func() {
            srv.Close()
            rh.Close()
            os.RemoveAll(dir)
            os.RemoveAll(resourceDir)
        },
    }
}

type TestSwarmServer struct {
    *httptest.Server
    Hasher            storage.SwarmHash
    FileStore         *storage.FileStore
    dir               string
    cleanup           func()
    timestampProvider *fakeTimeProvider
}

func (t *TestSwarmServer) Close() {
    t.cleanup()
}

func (t *TestSwarmServer) GetCurrentTime() mru.Timestamp {
    return t.timestampProvider.Now()
}

// EnableMetrics is starting InfluxDB reporter so that we collect stats when running tests locally
func EnableMetrics() {
    metrics.Enabled = true
    go influxdb.InfluxDBWithTags(metrics.DefaultRegistry, 1*time.Second, "http://localhost:8086", "metrics", "admin", "admin", "swarm.", map[string]string{
        "host": "test",
    })
}