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