binaryserializer_test.go 3.24 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
// 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/>.

17
package feed
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98

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)
	}
}