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// 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 (
"context"
"io/ioutil"
"os"
"testing"
ch "github.com/ethereum/go-ethereum/swarm/chunk"
)
var (
hashfunc = MakeHashFunc(DefaultHash)
)
// tests that the content address validator correctly checks the data
// tests that resource update chunks are passed through content address validator
// the test checking the resouce update validator internal correctness is found in resource_test.go
func TestValidator(t *testing.T) {
// set up localstore
datadir, err := ioutil.TempDir("", "storage-testvalidator")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(datadir)
params := NewDefaultLocalStoreParams()
params.Init(datadir)
store, err := NewLocalStore(params, nil)
if err != nil {
t.Fatal(err)
}
// check puts with no validators, both succeed
chunks := GenerateRandomChunks(259, 2)
goodChunk := chunks[0]
badChunk := chunks[1]
copy(badChunk.Data(), goodChunk.Data())
errs := putChunks(store, goodChunk, badChunk)
if errs[0] != nil {
t.Fatalf("expected no error on good content address chunk in spite of no validation, but got: %s", err)
}
if errs[1] != nil {
t.Fatalf("expected no error on bad content address chunk in spite of no validation, but got: %s", err)
}
// add content address validator and check puts
// bad should fail, good should pass
store.Validators = append(store.Validators, NewContentAddressValidator(hashfunc))
chunks = GenerateRandomChunks(ch.DefaultSize, 2)
goodChunk = chunks[0]
badChunk = chunks[1]
copy(badChunk.Data(), goodChunk.Data())
errs = putChunks(store, goodChunk, badChunk)
if errs[0] != nil {
t.Fatalf("expected no error on good content address chunk with content address validator only, but got: %s", err)
}
if errs[1] == nil {
t.Fatal("expected error on bad content address chunk with content address validator only, but got nil")
}
// append a validator that always denies
// bad should fail, good should pass,
var negV boolTestValidator
store.Validators = append(store.Validators, negV)
chunks = GenerateRandomChunks(ch.DefaultSize, 2)
goodChunk = chunks[0]
badChunk = chunks[1]
copy(badChunk.Data(), goodChunk.Data())
errs = putChunks(store, goodChunk, badChunk)
if errs[0] != nil {
t.Fatalf("expected no error on good content address chunk with content address validator only, but got: %s", err)
}
if errs[1] == nil {
t.Fatal("expected error on bad content address chunk with content address validator only, but got nil")
}
// append a validator that always approves
// all shall pass
var posV boolTestValidator = true
store.Validators = append(store.Validators, posV)
chunks = GenerateRandomChunks(ch.DefaultSize, 2)
goodChunk = chunks[0]
badChunk = chunks[1]
copy(badChunk.Data(), goodChunk.Data())
errs = putChunks(store, goodChunk, badChunk)
if errs[0] != nil {
t.Fatalf("expected no error on good content address chunk with content address validator only, but got: %s", err)
}
if errs[1] != nil {
t.Fatalf("expected no error on bad content address chunk in spite of no validation, but got: %s", err)
}
}
type boolTestValidator bool
func (self boolTestValidator) Validate(addr Address, data []byte) bool {
return bool(self)
}
// putChunks adds chunks to localstore
// It waits for receive on the stored channel
// It logs but does not fail on delivery error
func putChunks(store *LocalStore, chunks ...Chunk) []error {
i := 0
f := func(n int64) Chunk {
chunk := chunks[i]
i++
return chunk
}
_, errs := put(store, len(chunks), f)
return errs
}
func put(store *LocalStore, n int, f func(i int64) Chunk) (hs []Address, errs []error) {
for i := int64(0); i < int64(n); i++ {
chunk := f(ch.DefaultSize)
err := store.Put(context.TODO(), chunk)
errs = append(errs, err)
hs = append(hs, chunk.Address())
}
return hs, errs
}
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