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// Copyright (C) 2019-2021 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package logging
import (
"io/ioutil"
"os"
"testing"
"github.com/algorand/go-algorand/test/partitiontest"
"github.com/stretchr/testify/require"
)
func TestCyclicWrite(t *testing.T) {
partitiontest.PartitionTest(t)
liveFileName := "live.test"
archiveFileName := "archive.test"
defer os.Remove(liveFileName)
defer os.Remove(archiveFileName)
space := 1024
limit := uint64(space)
cyclicWriter := MakeCyclicFileWriter(liveFileName, archiveFileName, limit, 0)
firstWrite := make([]byte, space, space)
for i := 0; i < space; i++ {
firstWrite[i] = 'A'
}
n, err := cyclicWriter.Write(firstWrite)
require.NoError(t, err)
require.Equal(t, len(firstWrite), n)
secondWrite := []byte{'B'}
n, err = cyclicWriter.Write(secondWrite)
require.NoError(t, err)
require.Equal(t, len(secondWrite), n)
liveData, err := ioutil.ReadFile(liveFileName)
require.NoError(t, err)
require.Len(t, liveData, len(secondWrite))
require.Equal(t, byte('B'), liveData[0])
oldData, err := ioutil.ReadFile(archiveFileName)
require.NoError(t, err)
require.Len(t, oldData, space)
for i := 0; i < space; i++ {
require.Equal(t, byte('A'), oldData[i])
}
}
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