package querylog import ( "encoding/binary" "io" "io/ioutil" "math" "net" "os" "strings" "testing" "time" "github.com/stretchr/testify/assert" ) func TestQLogFileEmpty(t *testing.T) { testDir := prepareTestDir() defer func() { _ = os.RemoveAll(testDir) }() testFile := prepareTestFile(testDir, 0) // create the new QLogFile instance q, err := NewQLogFile(testFile) assert.Nil(t, err) assert.NotNil(t, q) defer q.Close() // seek to the start pos, err := q.SeekStart() assert.Nil(t, err) assert.Equal(t, int64(0), pos) // try reading anyway line, err := q.ReadNext() assert.Equal(t, io.EOF, err) assert.Equal(t, "", line) } func TestQLogFileLarge(t *testing.T) { // should be large enough count := 50000 testDir := prepareTestDir() defer func() { _ = os.RemoveAll(testDir) }() testFile := prepareTestFile(testDir, count) // create the new QLogFile instance q, err := NewQLogFile(testFile) assert.Nil(t, err) assert.NotNil(t, q) defer q.Close() // seek to the start pos, err := q.SeekStart() assert.Nil(t, err) assert.NotEqual(t, int64(0), pos) read := 0 var line string for err == nil { line, err = q.ReadNext() if err == nil { assert.True(t, len(line) > 0) read += 1 } } assert.Equal(t, count, read) assert.Equal(t, io.EOF, err) } func TestQLogFileSeekLargeFile(t *testing.T) { // more or less big file count := 10000 testDir := prepareTestDir() defer func() { _ = os.RemoveAll(testDir) }() testFile := prepareTestFile(testDir, count) // create the new QLogFile instance q, err := NewQLogFile(testFile) assert.Nil(t, err) assert.NotNil(t, q) defer q.Close() // CASE 1: NOT TOO OLD LINE testSeekLineQLogFile(t, q, 300) // CASE 2: OLD LINE testSeekLineQLogFile(t, q, count-300) // CASE 3: FIRST LINE testSeekLineQLogFile(t, q, 0) // CASE 4: LAST LINE testSeekLineQLogFile(t, q, count) // CASE 5: Seek non-existent (too low) _, _, err = q.Seek(123) assert.NotNil(t, err) // CASE 6: Seek non-existent (too high) ts, _ := time.Parse(time.RFC3339, "2100-01-02T15:04:05Z07:00") _, _, err = q.Seek(ts.UnixNano()) assert.NotNil(t, err) // CASE 7: "Almost" found line, err := getQLogFileLine(q, count/2) assert.Nil(t, err) // ALMOST the record we need timestamp := readQLogTimestamp(line) - 1 assert.NotEqual(t, uint64(0), timestamp) _, depth, err := q.Seek(timestamp) assert.NotNil(t, err) assert.True(t, depth <= int(math.Log2(float64(count))+3)) } func TestQLogFileSeekSmallFile(t *testing.T) { // more or less big file count := 10 testDir := prepareTestDir() defer func() { _ = os.RemoveAll(testDir) }() testFile := prepareTestFile(testDir, count) // create the new QLogFile instance q, err := NewQLogFile(testFile) assert.Nil(t, err) assert.NotNil(t, q) defer q.Close() // CASE 1: NOT TOO OLD LINE testSeekLineQLogFile(t, q, 2) // CASE 2: OLD LINE testSeekLineQLogFile(t, q, count-2) // CASE 3: FIRST LINE testSeekLineQLogFile(t, q, 0) // CASE 4: LAST LINE testSeekLineQLogFile(t, q, count) // CASE 5: Seek non-existent (too low) _, _, err = q.Seek(123) assert.NotNil(t, err) // CASE 6: Seek non-existent (too high) ts, _ := time.Parse(time.RFC3339, "2100-01-02T15:04:05Z07:00") _, _, err = q.Seek(ts.UnixNano()) assert.NotNil(t, err) // CASE 7: "Almost" found line, err := getQLogFileLine(q, count/2) assert.Nil(t, err) // ALMOST the record we need timestamp := readQLogTimestamp(line) - 1 assert.NotEqual(t, uint64(0), timestamp) _, depth, err := q.Seek(timestamp) assert.NotNil(t, err) assert.True(t, depth <= int(math.Log2(float64(count))+3)) } func testSeekLineQLogFile(t *testing.T, q *QLogFile, lineNumber int) { line, err := getQLogFileLine(q, lineNumber) assert.Nil(t, err) ts := readQLogTimestamp(line) assert.NotEqual(t, uint64(0), ts) // try seeking to that line now pos, _, err := q.Seek(ts) assert.Nil(t, err) assert.NotEqual(t, int64(0), pos) testLine, err := q.ReadNext() assert.Nil(t, err) assert.Equal(t, line, testLine) } func getQLogFileLine(q *QLogFile, lineNumber int) (string, error) { _, err := q.SeekStart() if err != nil { return "", err } for i := 1; i < lineNumber; i++ { _, err := q.ReadNext() if err != nil { return "", err } } return q.ReadNext() } // Check adding and loading (with filtering) entries from disk and memory func TestQLogFile(t *testing.T) { testDir := prepareTestDir() defer func() { _ = os.RemoveAll(testDir) }() testFile := prepareTestFile(testDir, 2) // create the new QLogFile instance q, err := NewQLogFile(testFile) assert.Nil(t, err) assert.NotNil(t, q) defer q.Close() // seek to the start pos, err := q.SeekStart() assert.Nil(t, err) assert.True(t, pos > 0) // read first line line, err := q.ReadNext() assert.Nil(t, err) assert.True(t, strings.Contains(line, "0.0.0.2"), line) assert.True(t, strings.HasPrefix(line, "{"), line) assert.True(t, strings.HasSuffix(line, "}"), line) // read second line line, err = q.ReadNext() assert.Nil(t, err) assert.Equal(t, int64(0), q.position) assert.True(t, strings.Contains(line, "0.0.0.1"), line) assert.True(t, strings.HasPrefix(line, "{"), line) assert.True(t, strings.HasSuffix(line, "}"), line) // try reading again (there's nothing to read anymore) line, err = q.ReadNext() assert.Equal(t, io.EOF, err) assert.Equal(t, "", line) } // prepareTestFile - prepares a test query log file with the specified number of lines func prepareTestFile(dir string, linesCount int) string { return prepareTestFiles(dir, 1, linesCount)[0] } // prepareTestFiles - prepares several test query log files // each of them -- with the specified linesCount func prepareTestFiles(dir string, filesCount, linesCount int) []string { format := `{"IP":"${IP}","T":"${TIMESTAMP}","QH":"example.org","QT":"A","QC":"IN","Answer":"AAAAAAABAAEAAAAAB2V4YW1wbGUDb3JnAAABAAEHZXhhbXBsZQNvcmcAAAEAAQAAAAAABAECAwQ=","Result":{},"Elapsed":0,"Upstream":"upstream"}` lineTime, _ := time.Parse(time.RFC3339Nano, "2020-02-18T22:36:35.920973+03:00") lineIP := uint32(0) files := make([]string, 0) for j := 0; j < filesCount; j++ { f, _ := ioutil.TempFile(dir, "*.txt") files = append(files, f.Name()) for i := 0; i < linesCount; i++ { lineIP += 1 lineTime = lineTime.Add(time.Second) ip := make(net.IP, 4) binary.BigEndian.PutUint32(ip, lineIP) line := format line = strings.ReplaceAll(line, "${IP}", ip.String()) line = strings.ReplaceAll(line, "${TIMESTAMP}", lineTime.Format(time.RFC3339Nano)) _, _ = f.WriteString(line) _, _ = f.WriteString("\n") } } return files } func TestQLogSeek(t *testing.T) { testDir := prepareTestDir() defer func() { _ = os.RemoveAll(testDir) }() d := `{"T":"2020-08-31T18:44:23.911246629+03:00","QH":"wfqvjymurpwegyv","QT":"A","QC":"IN","CP":"","Answer":"","Result":{},"Elapsed":66286385,"Upstream":"tls://dns-unfiltered.adguard.com:853"} {"T":"2020-08-31T18:44:25.376690873+03:00"} {"T":"2020-08-31T18:44:25.382540454+03:00"}` f, _ := ioutil.TempFile(testDir, "*.txt") _, _ = f.WriteString(d) defer f.Close() q, err := NewQLogFile(f.Name()) assert.Nil(t, err) defer q.Close() target, _ := time.Parse(time.RFC3339, "2020-08-31T18:44:25.376690873+03:00") _, depth, err := q.Seek(target.UnixNano()) assert.Nil(t, err) assert.Equal(t, 1, depth) }