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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 mru
import (
"encoding/json"
"reflect"
"testing"
"github.com/ethereum/go-ethereum/common/hexutil"
)
// KV mocks a key value store
type KV map[string]string
func (kv KV) Get(key string) string {
return kv[key]
}
func (kv KV) Set(key, value string) {
kv[key] = value
}
func compareByteSliceToExpectedHex(t *testing.T, variableName string, actualValue []byte, expectedHex string) {
if hexutil.Encode(actualValue) != expectedHex {
t.Fatalf("%s: Expected %s to be %s, got %s", t.Name(), variableName, expectedHex, hexutil.Encode(actualValue))
}
}
func testBinarySerializerRecovery(t *testing.T, bin binarySerializer, expectedHex string) {
name := reflect.TypeOf(bin).Elem().Name()
serialized := make([]byte, bin.binaryLength())
if err := bin.binaryPut(serialized); err != nil {
t.Fatalf("%s.binaryPut error when trying to serialize structure: %s", name, err)
}
compareByteSliceToExpectedHex(t, name, serialized, expectedHex)
recovered := reflect.New(reflect.TypeOf(bin).Elem()).Interface().(binarySerializer)
if err := recovered.binaryGet(serialized); err != nil {
t.Fatalf("%s.binaryGet error when trying to deserialize structure: %s", name, err)
}
if !reflect.DeepEqual(bin, recovered) {
t.Fatalf("Expected that the recovered %s equals the marshalled %s", name, name)
}
serializedWrongLength := make([]byte, 1)
copy(serializedWrongLength[:], serialized)
if err := recovered.binaryGet(serializedWrongLength); err == nil {
t.Fatalf("Expected %s.binaryGet to fail since data is too small", name)
}
}
func testBinarySerializerLengthCheck(t *testing.T, bin binarySerializer) {
name := reflect.TypeOf(bin).Elem().Name()
// make a slice that is too small to contain the metadata
serialized := make([]byte, bin.binaryLength()-1)
if err := bin.binaryPut(serialized); err == nil {
t.Fatalf("Expected %s.binaryPut to fail, since target slice is too small", name)
}
}
func testValueSerializer(t *testing.T, v valueSerializer, expected KV) {
name := reflect.TypeOf(v).Elem().Name()
kv := make(KV)
v.AppendValues(kv)
if !reflect.DeepEqual(expected, kv) {
expj, _ := json.Marshal(expected)
gotj, _ := json.Marshal(kv)
t.Fatalf("Expected %s.AppendValues to return %s, got %s", name, string(expj), string(gotj))
}
recovered := reflect.New(reflect.TypeOf(v).Elem()).Interface().(valueSerializer)
err := recovered.FromValues(kv)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(recovered, v) {
t.Fatalf("Expected recovered %s to be the same", name)
}
}
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