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 (
    "context"
    "io/ioutil"
    "math/big"
    "net/http"
    "net/http/httptest"
    "os"
    "testing"

    "github.com/ethereum/go-ethereum/core/types"
    "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)
}

type fakeBackend struct {
    blocknumber int64
}

func (f *fakeBackend) HeaderByNumber(context context.Context, _ string, bigblock *big.Int) (*types.Header, error) {
    f.blocknumber++
    biggie := big.NewInt(f.blocknumber)
    return &types.Header{
        Number: biggie,
    }, nil
}

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)
    }
    rhparams := &mru.HandlerParams{
        QueryMaxPeriods: &mru.LookupParams{},
        HeaderGetter: &fakeBackend{
            blocknumber: 42,
        },
    }
    rh, err := mru.NewTestHandler(resourceDir, rhparams)
    if err != nil {
        t.Fatal(err)
    }

    a := api.NewAPI(fileStore, nil, rh)
    srv := httptest.NewServer(serverFunc(a))
    return &TestSwarmServer{
        Server:    srv,
        FileStore: fileStore,
        dir:       dir,
        Hasher:    storage.MakeHashFunc(storage.DefaultHash)(),
        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()
}

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