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time_test.go
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time_test.go
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//go:build !race && !notime
package grep_test
import (
"encoding/json"
"fmt"
"os"
"os/exec"
"path/filepath"
"runtime"
"testing"
"time"
"github.com/alex123012/go-grep"
)
type TimeTestCase struct {
testCase *TestCase
memoryCheck bool
f func(testCase *TimeTestCase, t *testing.T) (bool, error)
core coreType
}
// binary, time, mem, disk, files, pattern_len
type FilesInDir struct {
Binary coreType `json:"binary"`
TimeDuration time.Duration `json:"time_Ms"`
MaxMemoryUsage uint64 `json:"mem_b"`
DiskUsage int `json:"disk_b"`
FilesCount int `json:"files"`
PatternLen int `json:"pattern_len"`
FileName string `json:"-"`
}
type coreType string
var goCore coreType = "Go"
var gnuCore coreType = "Gnu"
func TestTime(t *testing.T) {
testCases := []*TestCase{
{
fileName: "./test_cases",
pattern: "TGNEKKQLSSSAERQIDEARELLEQMDLE",
},
{
fileName: "./test_cases/test_time",
pattern: "TGNEKKQLSSSAERQIDEARELLEQMDLE",
},
{
fileName: "./test_cases/test_time/test_dir1",
pattern: "TGNEKKQLSSSAERQIDEARELLEQMDLE",
},
{
fileName: "./test_cases/test_time/test_dir1/test_dir1",
pattern: "TGNEKKQLSSSAERQIDEARELLEQMDLE",
},
}
timeTestCases := generateTestCases(testCases)
resultGrep := make([]*FilesInDir, len(timeTestCases))
for i, timeTestCase := range timeTestCases {
var maxMemorySlice []uint64
var timeDurutionSlice []time.Duration
for i := 0; i < 5; i++ {
timeTestCase.memoryCheck = true
_, _, maxMemory, _ := getResults(timeTestCase, t)
timeTestCase.memoryCheck = false
timeDur, _, _, _ := getResults(timeTestCase, t)
maxMemorySlice = append(maxMemorySlice, maxMemory)
timeDurutionSlice = append(timeDurutionSlice, timeDur)
}
filesCount := 0
diskUsage := 0
err := filepath.Walk(timeTestCase.testCase.fileName, func(path string, info os.FileInfo, err error) error {
if err == nil && !info.IsDir() {
filesCount++
diskUsage += (int)(info.Size())
}
return nil
})
if err != nil {
t.Log(err)
}
resultGrep[i] = &FilesInDir{
DiskUsage: diskUsage,
FilesCount: filesCount,
FileName: timeTestCase.testCase.fileName,
Binary: timeTestCase.core,
PatternLen: len(timeTestCase.testCase.pattern),
MaxMemoryUsage: mean(maxMemorySlice),
TimeDuration: time.Duration(mean(timeDurutionSlice).Microseconds()),
}
}
res2J, err := json.MarshalIndent(resultGrep, "", " ")
if err != nil {
t.Log(err)
}
err = os.WriteFile("result_time.json", res2J, 0644)
if err != nil {
t.Log(err)
}
}
func generateTestCases(testCases []*TestCase) []*TimeTestCase {
tmpCases := []*TimeTestCase{
{
f: testGo,
core: goCore,
},
{
f: testGnu,
core: gnuCore,
},
}
var timeTestCases []*TimeTestCase
for _, testCase := range testCases {
for _, tmp := range tmpCases {
timeTestCases = append(timeTestCases, &TimeTestCase{
testCase: testCase,
f: tmp.f,
core: tmp.core,
})
}
}
return timeTestCases
}
func getResults(testCase *TimeTestCase, t *testing.T) (time.Duration, bool, uint64, string) {
runtime.GC()
resTime, result, memory := timeTest(testCase, t)
mem, rem := memory/1024, memory%1024
resString := fmt.Sprintf("Memory stats %s: %dms, %t, %d.%dKb (memory check: %t)", testCase.core, resTime.Milliseconds(), result, mem, rem, testCase.memoryCheck)
return resTime, result, memory, resString
}
func timeTest(testCase *TimeTestCase, t *testing.T) (time.Duration, bool, uint64) {
closeChan := make(chan struct{})
memChan := make(chan uint64)
defer close(memChan)
if testCase.memoryCheck {
go func() {
var memStats runtime.MemStats
runtime.ReadMemStats(&memStats)
var tmpMemstats runtime.MemStats
loop:
for {
runtime.ReadMemStats(&tmpMemstats)
if tmpMemstats.HeapAlloc > memStats.HeapAlloc {
memStats = tmpMemstats
}
select {
case <-closeChan:
memChan <- memStats.HeapAlloc
break loop
default:
time.Sleep(100 * time.Nanosecond)
}
}
}()
}
start := time.Now()
result, err := testCase.f(testCase, t)
end := time.Since(start)
if err != nil {
t.Log(err)
}
close(closeChan)
var maxMemory uint64
if testCase.memoryCheck {
maxMemory = <-memChan
}
return end, result, maxMemory
}
func testGo(testCase *TimeTestCase, t *testing.T) (bool, error) {
patternSearch := grep.MakeStringFinder(testCase.testCase.pattern)
fileMap, err := patternSearch.Search(testCase.testCase.fileName, false)
return fileMap.Len() == 0, err
}
func testGnu(testCase *TimeTestCase, t *testing.T) (bool, error) {
cmd := exec.Command("bash", "-c", fmt.Sprintf("grep -rl '%s' %s", testCase.testCase.pattern, testCase.testCase.fileName))
stdout, err := cmd.CombinedOutput()
return string(stdout) == "exit status 1 : ", err
}
type Number interface {
uint64 | int | time.Duration
}
func mean[T Number](data []T) T {
if len(data) == 0 {
return 0
}
var sum T
for _, d := range data {
sum += d
}
return sum / (T)(len(data))
}