cmd/swarm, swarm/api/http, swarm/bmt, swarm/fuse, swarm/network/stream, swarm/storage, swarm/storage/encryption, swarm/testutil: use pseudo-random instead of crypto-random for test files content generation (#18083)

- Replace "crypto/rand" to "math/rand" for files content generation
- Remove swarm/network_test.go.Shuffle and swarm/btm/btm_test.go.Shuffle - because go1.9 support dropped (see https://github.com/ethereum/go-ethereum/pull/17807 and comments to swarm/network_test.go.Shuffle)

2 files changed, 21 insertions, 97 deletions

diff --git a/swarm/testutil/file.go b/swarm/testutil/file.go
index ecb0d971e..70732aa92 100644
--- a/swarm/testutil/file.go
+++ b/swarm/testutil/file.go
@@ -17,8 +17,10 @@
 package testutil
 
 import (
+	"bytes"
 	"io"
 	"io/ioutil"
+	"math/rand"
 	"os"
 	"strings"
 	"testing"
@@ -42,3 +44,22 @@ func TempFileWithContent(t *testing.T, content string) string {
 	}
 	return tempFile.Name()
 }
+
+// RandomBytes returns pseudo-random deterministic result
+// because test fails must be reproducible
+func RandomBytes(seed, length int) []byte {
+	b := make([]byte, length)
+	reader := rand.New(rand.NewSource(int64(seed)))
+	for n := 0; n < length; {
+		read, err := reader.Read(b[n:])
+		if err != nil {
+			panic(err)
+		}
+		n += read
+	}
+	return b
+}
+
+func RandomReader(seed, length int) *bytes.Reader {
+	return bytes.NewReader(RandomBytes(seed, length))
+}
diff --git a/swarm/testutil/http.go b/swarm/testutil/http.go
deleted file mode 100644
index cdf9239d0..000000000
--- a/swarm/testutil/http.go
+++ /dev/null
@@ -1,97 +0,0 @@
-// 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"
-
-	"github.com/ethereum/go-ethereum/swarm/api"
-	"github.com/ethereum/go-ethereum/swarm/storage"
-	"github.com/ethereum/go-ethereum/swarm/storage/feed"
-)
-
-type TestServer interface {
-	ServeHTTP(http.ResponseWriter, *http.Request)
-}
-
-func NewTestSwarmServer(t *testing.T, serverFunc func(*api.API) TestServer, resolver api.Resolver) *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())
-
-	// Swarm feeds test setup
-	feedsDir, err := ioutil.TempDir("", "swarm-feeds-test")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	rhparams := &feed.HandlerParams{}
-	rh, err := feed.NewTestHandler(feedsDir, rhparams)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	a := api.NewAPI(fileStore, resolver, rh.Handler, nil)
-	srv := httptest.NewServer(serverFunc(a))
-	tss := &TestSwarmServer{
-		Server:    srv,
-		FileStore: fileStore,
-		dir:       dir,
-		Hasher:    storage.MakeHashFunc(storage.DefaultHash)(),
-		cleanup: func() {
-			srv.Close()
-			rh.Close()
-			os.RemoveAll(dir)
-			os.RemoveAll(feedsDir)
-		},
-		CurrentTime: 42,
-	}
-	feed.TimestampProvider = tss
-	return tss
-}
-
-type TestSwarmServer struct {
-	*httptest.Server
-	Hasher      storage.SwarmHash
-	FileStore   *storage.FileStore
-	dir         string
-	cleanup     func()
-	CurrentTime uint64
-}
-
-func (t *TestSwarmServer) Close() {
-	t.cleanup()
-}
-
-func (t *TestSwarmServer) Now() feed.Timestamp {
-	return feed.Timestamp{Time: t.CurrentTime}
-}