349 lines
7.6 KiB
Go
349 lines
7.6 KiB
Go
package querylog
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import (
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"encoding/binary"
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"fmt"
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"io"
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"math"
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"net"
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"os"
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"strings"
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"testing"
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"time"
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"github.com/AdguardTeam/golibs/errors"
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"github.com/AdguardTeam/golibs/testutil"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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// prepareTestFile prepares one test query log file with the specified lines
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// count.
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func prepareTestFile(t *testing.T, dir string, linesNum int) (name string) {
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t.Helper()
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f, err := os.CreateTemp(dir, "*.txt")
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require.NoError(t, err)
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// Use defer and not t.Cleanup to make sure that the file is closed
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// after this function is done.
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defer func() {
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derr := f.Close()
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require.NoError(t, derr)
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}()
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const ans = `"AAAAAAABAAEAAAAAB2V4YW1wbGUDb3JnAAABAAEHZXhhbXBsZQNvcmcAAAEAAQAAAAAABAECAwQ="`
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const format = `{"IP":%q,"T":%q,"QH":"example.org","QT":"A","QC":"IN",` +
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`"Answer":` + ans + `,"Result":{},"Elapsed":0,"Upstream":"upstream"}` + "\n"
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var lineIP uint32
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lineTime := time.Date(2020, 2, 18, 19, 36, 35, 920973000, time.UTC)
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for range linesNum {
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lineIP++
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lineTime = lineTime.Add(time.Second)
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ip := make(net.IP, 4)
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binary.BigEndian.PutUint32(ip, lineIP)
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line := fmt.Sprintf(format, ip, lineTime.Format(time.RFC3339Nano))
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_, err = f.WriteString(line)
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require.NoError(t, err)
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}
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return f.Name()
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}
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// prepareTestFiles prepares several test query log files, each with the
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// specified lines count.
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func prepareTestFiles(t *testing.T, filesNum, linesNum int) []string {
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t.Helper()
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if filesNum == 0 {
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return []string{}
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}
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dir := t.TempDir()
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files := make([]string, filesNum)
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for i := range files {
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files[filesNum-i-1] = prepareTestFile(t, dir, linesNum)
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}
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return files
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}
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// newTestQLogFile creates new *qLogFile for tests and registers the required
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// cleanup functions.
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func newTestQLogFile(t *testing.T, linesNum int) (file *qLogFile) {
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t.Helper()
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testFile := prepareTestFiles(t, 1, linesNum)[0]
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// Create the new qLogFile instance.
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file, err := newQLogFile(testFile)
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require.NoError(t, err)
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assert.NotNil(t, file)
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testutil.CleanupAndRequireSuccess(t, file.Close)
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return file
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}
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func TestQLogFile_ReadNext(t *testing.T) {
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testCases := []struct {
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name string
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linesNum int
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}{{
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name: "empty",
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linesNum: 0,
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}, {
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name: "large",
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linesNum: 50000,
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}}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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q := newTestQLogFile(t, tc.linesNum)
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// Calculate the expected position.
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fileInfo, err := q.file.Stat()
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require.NoError(t, err)
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var expPos int64
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if expPos = fileInfo.Size(); expPos > 0 {
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expPos--
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}
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// Seek to the start.
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pos, err := q.SeekStart()
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require.NoError(t, err)
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require.EqualValues(t, expPos, pos)
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var read int
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var line string
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for err == nil {
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line, err = q.ReadNext()
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if err == nil {
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assert.NotEmpty(t, line)
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read++
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}
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}
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require.Equal(t, io.EOF, err)
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assert.Equal(t, tc.linesNum, read)
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})
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}
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}
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func TestQLogFile_SeekTS_good(t *testing.T) {
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linesCases := []struct {
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name string
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num int
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}{{
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name: "large",
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num: 10000,
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}, {
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name: "small",
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num: 10,
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}}
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for _, l := range linesCases {
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testCases := []struct {
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name string
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linesNum int
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line int
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}{{
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name: "not_too_old",
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line: 2,
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}, {
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name: "old",
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line: l.num - 2,
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}, {
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name: "first",
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line: 0,
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}, {
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name: "last",
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line: l.num,
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}}
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q := newTestQLogFile(t, l.num)
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for _, tc := range testCases {
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t.Run(l.name+"_"+tc.name, func(t *testing.T) {
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line, err := getQLogFileLine(q, tc.line)
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require.NoError(t, err)
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ts := readQLogTimestamp(line)
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assert.NotEqualValues(t, 0, ts)
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// Try seeking to that line now.
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pos, _, err := q.seekTS(ts)
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require.NoError(t, err)
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assert.NotEqualValues(t, 0, pos)
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testLine, err := q.ReadNext()
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require.NoError(t, err)
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assert.Equal(t, line, testLine)
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})
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}
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}
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}
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func TestQLogFile_SeekTS_bad(t *testing.T) {
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linesCases := []struct {
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name string
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num int
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}{{
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name: "large",
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num: 10000,
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}, {
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name: "small",
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num: 10,
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}}
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for _, l := range linesCases {
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testCases := []struct {
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name string
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ts int64
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leq bool
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}{{
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name: "non-existent_long_ago",
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}, {
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name: "non-existent_far_ahead",
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}, {
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name: "almost",
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leq: true,
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}}
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q := newTestQLogFile(t, l.num)
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testCases[0].ts = 123
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lateTS, _ := time.Parse(time.RFC3339, "2100-01-02T15:04:05Z07:00")
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testCases[1].ts = lateTS.UnixNano()
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line, err := getQLogFileLine(q, l.num/2)
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require.NoError(t, err)
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testCases[2].ts = readQLogTimestamp(line) - 1
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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assert.NotEqualValues(t, 0, tc.ts)
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var depth int
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_, depth, err = q.seekTS(tc.ts)
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assert.NotEmpty(t, l.num)
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require.Error(t, err)
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if tc.leq {
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assert.LessOrEqual(t, depth, int(math.Log2(float64(l.num))+3))
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}
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})
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}
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}
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}
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func getQLogFileLine(q *qLogFile, lineNumber int) (line string, err error) {
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if _, err = q.SeekStart(); err != nil {
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return line, err
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}
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for i := 1; i < lineNumber; i++ {
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if _, err = q.ReadNext(); err != nil {
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return line, err
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}
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}
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return q.ReadNext()
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}
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// Check adding and loading (with filtering) entries from disk and memory.
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func TestQLogFile(t *testing.T) {
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// Create the new qLogFile instance.
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q := newTestQLogFile(t, 2)
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// Seek to the start.
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pos, err := q.SeekStart()
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require.NoError(t, err)
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assert.Greater(t, pos, int64(0))
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// Read first line.
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line, err := q.ReadNext()
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require.NoError(t, err)
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assert.Contains(t, line, "0.0.0.2")
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assert.True(t, strings.HasPrefix(line, "{"), line)
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assert.True(t, strings.HasSuffix(line, "}"), line)
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// Read second line.
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line, err = q.ReadNext()
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require.NoError(t, err)
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assert.EqualValues(t, 0, q.position)
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assert.Contains(t, line, "0.0.0.1")
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assert.True(t, strings.HasPrefix(line, "{"), line)
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assert.True(t, strings.HasSuffix(line, "}"), line)
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// Try reading again (there's nothing to read anymore).
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line, err = q.ReadNext()
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require.Equal(t, io.EOF, err)
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assert.Empty(t, line)
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}
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func newTestQLogFileData(t *testing.T, data string) (file *qLogFile) {
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f, err := os.CreateTemp(t.TempDir(), "*.txt")
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require.NoError(t, err)
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testutil.CleanupAndRequireSuccess(t, f.Close)
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_, err = f.WriteString(data)
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require.NoError(t, err)
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file, err = newQLogFile(f.Name())
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require.NoError(t, err)
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testutil.CleanupAndRequireSuccess(t, file.Close)
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return file
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}
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func TestQLog_Seek(t *testing.T) {
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const nl = "\n"
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const strV = "%s"
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const recs = `{"T":"` + strV + `","QH":"wfqvjymurpwegyv","QT":"A","QC":"IN","CP":"","Answer":"","Result":{},"Elapsed":66286385,"Upstream":"tls://unfiltered.adguard-dns.com:853"}` + nl +
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`{"T":"` + strV + `"}` + nl +
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`{"T":"` + strV + `"}` + nl
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timestamp, _ := time.Parse(time.RFC3339Nano, "2020-08-31T18:44:25.376690873+03:00")
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testCases := []struct {
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wantErr error
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name string
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delta int
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wantDepth int
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}{{
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name: "ok",
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delta: 0,
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wantErr: nil,
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wantDepth: 2,
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}, {
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name: "too_late",
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delta: 2,
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wantErr: errTSTooLate,
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wantDepth: 2,
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}, {
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name: "too_early",
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delta: -2,
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wantErr: errTSTooEarly,
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wantDepth: 1,
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}}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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data := fmt.Sprintf(recs,
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timestamp.Add(-time.Second).Format(time.RFC3339Nano),
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timestamp.Format(time.RFC3339Nano),
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timestamp.Add(time.Second).Format(time.RFC3339Nano),
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)
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q := newTestQLogFileData(t, data)
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_, depth, err := q.seekTS(timestamp.Add(time.Second * time.Duration(tc.delta)).UnixNano())
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require.Truef(t, errors.Is(err, tc.wantErr), "%v", err)
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assert.Equal(t, tc.wantDepth, depth)
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})
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}
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}
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