From 3ec0007ce47969bd33fa695bc5645bb532bb7a8c Mon Sep 17 00:00:00 2001
From: Anton Evangelatov <anton.evangelatov@gmail.com>
Date: Mon, 2 Apr 2018 20:39:27 +0200
Subject: [PATCH] swarm/storage: MemStore tests - reproduce panic

---
 swarm/storage/memstore2_test.go | 95 +++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 swarm/storage/memstore2_test.go

diff --git a/swarm/storage/memstore2_test.go b/swarm/storage/memstore2_test.go
new file mode 100644
index 0000000000..4339777242
--- /dev/null
+++ b/swarm/storage/memstore2_test.go
@@ -0,0 +1,95 @@
+// 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 storage
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/log"
+)
+
+func newLDBStore(t *testing.T) (*LDBStore, func()) {
+	dir, err := ioutil.TempDir("", "bzz-storage-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	log.Trace("memstore.tempdir", "dir", dir)
+	fmt.Println(dir)
+
+	db, err := NewLDBStore(dir, MakeHashFunc(SHA3Hash), defaultDbCapacity, testPoFunc)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cleanup := func() {
+		err := os.RemoveAll(dir)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	return db, cleanup
+}
+
+func newMemStore(t *testing.T) (*MemStore, func()) {
+	ldb, cleanup := newLDBStore(t)
+	ldb.setCapacity(singletonSwarmDbCapacity)
+
+	memstore := NewMemStore(ldb, defaultCacheCapacity)
+	return memstore, cleanup
+}
+
+func TestMemStore(t *testing.T) {
+	log.Root().SetHandler(log.LvlFilterHandler(log.LvlTrace, log.StreamHandler(os.Stderr, log.TerminalFormat(true))))
+
+	memStore, cleanup := newMemStore(t)
+	defer cleanup()
+
+	tests := []struct {
+		n         int   // number of chunks to push to memStore
+		chunkSize int64 // size of chunk (by default in Swarm - 4096)
+	}{
+		{
+			n:         10001,
+			chunkSize: 4096,
+		},
+	}
+
+	for _, tt := range tests {
+		var chunks []*Chunk
+
+		for i := 0; i < tt.n; i++ {
+			chunks = append(chunks, NewChunk(nil, make(chan bool)))
+		}
+
+		FakeChunk(tt.chunkSize, tt.n, chunks)
+
+		for i := 0; i < tt.n; i++ {
+			memStore.Put(chunks[i])
+		}
+
+		for i := 0; i < tt.n; i++ {
+			_, err := memStore.Get(chunks[i].Key)
+			if err != nil {
+				t.Fatal(err)
+			}
+		}
+	}
+}