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package main
import (
"bytes"
"io/ioutil"
"log"
"os"
"path"
"testing"
"github.com/gabstv/go-bsdiff/pkg/bsdiff"
)
func TestMain(m *testing.M) {
setup()
code := m.Run()
shutdown()
os.Exit(code)
}
func setup() {
log.SetFlags(log.Lshortfile)
}
func shutdown() {}
func prepareResult() string {
result := path.Join("test", "result")
os.RemoveAll(result)
os.MkdirAll(result, 0775)
return result
}
func chunkCompare(t *testing.T, dataDir string, testFiles []string, chunkCount int) {
chunks := make(chan []byte)
files := listFiles(dataDir)
go readFiles(files, chunks)
offset := 0
buff := make([]byte, chunkSize*chunkCount)
for _, f := range testFiles {
content, err := os.ReadFile(path.Join(dataDir, f))
if err != nil {
t.Error("Error reading test data file")
}
for i := range content {
buff[offset+i] = content[i]
}
offset += len(content)
}
i := 0
for c := range chunks {
content := buff[i*chunkSize : (i+1)*chunkSize]
if len(c) != chunkSize {
t.Errorf("Chunk %d is not of chunkSize: %d", i, chunkSize)
}
if bytes.Compare(c, content) != 0 {
t.Errorf("Chunk %d does not match file content", i)
t.Log("Expected: ", c[:10], "...")
t.Log("Result:", content)
}
i++
}
if i != chunkCount {
t.Errorf("Incorrect number of chunks: %d, should be: %d", i, chunkCount)
}
}
func TestReadFiles1(t *testing.T) {
chunkCount := 1
dataDir := path.Join("test", "data", "logs.1")
files := []string{"logTest.log"}
chunkCompare(t, dataDir, files, chunkCount)
}
func TestReadFiles2(t *testing.T) {
chunkCount := 3
dataDir := path.Join("test", "data", "logs.2")
files := []string{"csvParserTest.log", "slipdb.log"}
chunkCompare(t, dataDir, files, chunkCount)
}
func TestReadFiles3(t *testing.T) {
chunkCount := 15
dataDir := path.Join("test", "data")
files := []string{
path.Join("logs.1", "logTest.log"),
path.Join("logs.2", "csvParserTest.log"),
path.Join("logs.2", "slipdb.log"),
path.Join("logs.3", "indexingTreeTest.log"),
}
chunkCompare(t, dataDir, files, chunkCount)
}
func TestLoadChunks(t *testing.T) {
resultDir := prepareResult()
dataDir := path.Join("test", "data")
resultVersion := path.Join(resultDir, "00000")
resultChunks := path.Join(resultVersion, "chunks")
os.MkdirAll(resultChunks, 0775)
chunks1 := make(chan []byte, 16)
chunks2 := make(chan []byte, 16)
chunks3 := make(chan Chunk, 16)
files := listFiles(dataDir)
go readFiles(files, chunks1)
go readFiles(files, chunks2)
storeChunks(resultChunks, chunks1)
versions := []string{resultVersion}
go loadChunks(versions, chunks3)
i := 0
for c2 := range chunks2 {
c3 := <-chunks3
if bytes.Compare(c2, c3.Value) != 0 {
t.Errorf("Chunk %d does not match file content", i)
t.Log("Expected: ", c2[:10], "...")
t.Log("Result:", c3.Value)
}
i++
}
}
func TestStoreLoadFiles(t *testing.T) {
resultDir := prepareResult()
dataDir := path.Join("test", "data")
resultFiles := path.Join(resultDir, "files")
files1 := listFiles(dataDir)
storeFiles(resultFiles, files1)
files2 := loadFiles(resultFiles)
for i, f := range files1 {
if f != files2[i] {
t.Errorf("Loaded file data %d does not match stored one", i)
t.Log("Expected: ", f)
t.Log("Result: ", files2[i])
}
}
}
func TestBsdiff(t *testing.T) {
resultDir := prepareResult()
dataDir := path.Join("test", "data")
addedFile := path.Join(dataDir, "logs.2", "slogTest.log")
resultVersion := path.Join(resultDir, "00000")
resultChunks := path.Join(resultVersion, "chunks")
os.MkdirAll(resultChunks, 0775)
chunks := make(chan []byte, 16)
files := listFiles(dataDir)
go readFiles(files, chunks)
storeChunks(resultChunks, chunks)
input, _ := ioutil.ReadFile(path.Join(dataDir, "logs.1", "logTest.log"))
ioutil.WriteFile(addedFile, input, 0664)
newChunks := make(chan []byte, 16)
oldChunks := make(chan Chunk, 16)
files = listFiles(dataDir)
repo := NewRepo(resultDir)
versions := repo.loadVersions()
go loadChunks(versions, oldChunks)
go readFiles(files, newChunks)
hashes := hashChunks(oldChunks)
recipe := repo.matchChunks(newChunks, hashes)
buff := new(bytes.Buffer)
bsdiff.Reader(recipe[2], recipe[0], buff)
if len(buff.Bytes()) >= chunkSize {
t.Errorf("Bsdiff of chunk is too large: %d", len(buff.Bytes()))
}
os.Remove(addedFile)
}
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