AdGuardHome/internal/querylog/qlog_reader_test.go

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package querylog
import (
"errors"
"io"
"os"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
func TestQLogReaderEmpty(t *testing.T) {
r, err := NewQLogReader([]string{})
assert.Nil(t, err)
assert.NotNil(t, r)
defer r.Close()
// seek to the start
err = r.SeekStart()
assert.Nil(t, err)
line, err := r.ReadNext()
assert.Equal(t, "", line)
assert.Equal(t, io.EOF, err)
}
func TestQLogReaderOneFile(t *testing.T) {
// let's do one small file
count := 10
filesCount := 1
testDir := prepareTestDir()
defer func() { _ = os.RemoveAll(testDir) }()
testFiles := prepareTestFiles(testDir, filesCount, count)
r, err := NewQLogReader(testFiles)
assert.Nil(t, err)
assert.NotNil(t, r)
defer r.Close()
// seek to the start
err = r.SeekStart()
assert.Nil(t, err)
// read everything
read := 0
var line string
for err == nil {
line, err = r.ReadNext()
if err == nil {
assert.True(t, len(line) > 0)
read += 1
}
}
assert.Equal(t, count*filesCount, read)
assert.Equal(t, io.EOF, err)
}
func TestQLogReaderMultipleFiles(t *testing.T) {
// should be large enough
count := 10000
filesCount := 5
testDir := prepareTestDir()
defer func() { _ = os.RemoveAll(testDir) }()
testFiles := prepareTestFiles(testDir, filesCount, count)
r, err := NewQLogReader(testFiles)
assert.Nil(t, err)
assert.NotNil(t, r)
defer r.Close()
// seek to the start
err = r.SeekStart()
assert.Nil(t, err)
// read everything
read := 0
var line string
for err == nil {
line, err = r.ReadNext()
if err == nil {
assert.True(t, len(line) > 0)
read += 1
}
}
assert.Equal(t, count*filesCount, read)
assert.Equal(t, io.EOF, err)
}
func TestQLogReader_Seek(t *testing.T) {
count := 10000
filesCount := 2
testDir := prepareTestDir()
t.Cleanup(func() {
_ = os.RemoveAll(testDir)
})
testFiles := prepareTestFiles(testDir, filesCount, count)
r, err := NewQLogReader(testFiles)
assert.Nil(t, err)
assert.NotNil(t, r)
t.Cleanup(func() {
_ = r.Close()
})
testCases := []struct {
name string
time string
want error
}{{
name: "not_too_old",
time: "2020-02-19T04:04:56.920973+03:00",
want: nil,
}, {
name: "old",
time: "2020-02-19T01:28:16.920973+03:00",
want: nil,
}, {
name: "first",
time: "2020-02-19T04:09:55.920973+03:00",
want: nil,
}, {
name: "last",
time: "2020-02-19T01:23:16.920973+03:00",
want: nil,
}, {
name: "non-existent_long_ago",
time: "2000-02-19T01:23:16.920973+03:00",
want: ErrSeekNotFound,
}, {
name: "non-existent_far_ahead",
time: "2100-02-19T01:23:16.920973+03:00",
want: ErrEndOfLog,
}, {
name: "non-existent_but_could",
time: "2020-02-19T03:00:00.000000+03:00",
want: ErrSeekNotFound,
}}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
timestamp, err := time.Parse(time.RFC3339Nano, tc.time)
assert.Nil(t, err)
err = r.Seek(timestamp.UnixNano())
assert.True(t, errors.Is(err, tc.want), err)
})
}
}
func TestQLogReader_ReadNext(t *testing.T) {
count := 10
filesCount := 1
testDir := prepareTestDir()
t.Cleanup(func() {
_ = os.RemoveAll(testDir)
})
testFiles := prepareTestFiles(testDir, filesCount, count)
r, err := NewQLogReader(testFiles)
assert.Nil(t, err)
assert.NotNil(t, r)
t.Cleanup(func() {
_ = r.Close()
})
testCases := []struct {
name string
start int
want error
}{{
name: "ok",
start: 0,
want: nil,
}, {
name: "too_big",
start: count + 1,
want: io.EOF,
}}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
err := r.SeekStart()
assert.Nil(t, err, err)
for i := 1; i < tc.start; i++ {
_, err := r.ReadNext()
assert.Nil(t, err)
}
_, err = r.ReadNext()
assert.Equal(t, tc.want, err)
})
}
}
// TODO(e.burkov): Remove the tests below. Make tests above more compelling.
func TestQLogReaderSeek(t *testing.T) {
// more or less big file
count := 10000
filesCount := 2
testDir := prepareTestDir()
defer func() { _ = os.RemoveAll(testDir) }()
testFiles := prepareTestFiles(testDir, filesCount, count)
r, err := NewQLogReader(testFiles)
assert.Nil(t, err)
assert.NotNil(t, r)
defer r.Close()
// CASE 1: NOT TOO OLD LINE
testSeekLineQLogReader(t, r, 300)
// CASE 2: OLD LINE
testSeekLineQLogReader(t, r, count-300)
// CASE 3: FIRST LINE
testSeekLineQLogReader(t, r, 0)
// CASE 4: LAST LINE
testSeekLineQLogReader(t, r, count)
// CASE 5: Seek non-existent (too low)
err = r.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 = r.Seek(ts.UnixNano())
assert.NotNil(t, err)
}
func testSeekLineQLogReader(t *testing.T, r *QLogReader, lineNumber int) {
line, err := getQLogReaderLine(r, lineNumber)
assert.Nil(t, err)
ts := readQLogTimestamp(line)
assert.NotEqual(t, uint64(0), ts)
// try seeking to that line now
err = r.Seek(ts)
assert.Nil(t, err)
testLine, err := r.ReadNext()
assert.Nil(t, err)
assert.Equal(t, line, testLine)
}
func getQLogReaderLine(r *QLogReader, lineNumber int) (string, error) {
err := r.SeekStart()
if err != nil {
return "", err
}
for i := 1; i < lineNumber; i++ {
_, err := r.ReadNext()
if err != nil {
return "", err
}
}
return r.ReadNext()
}