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package file
import (
"strings"
"sync"
"syscall"
"testing"
)
func TestFlagsBuildStringConcurrent(t *testing.T) {
flagsToHumanCache = sync.Map{}
const workers = 32
const iterations = 500
const want = "O_WRONLY|O_APPEND"
flag := Flags(syscall.O_WRONLY | syscall.O_APPEND)
var wg sync.WaitGroup
errs := make(chan string, workers)
for i := 0; i < workers; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for j := 0; j < iterations; j++ {
var sb strings.Builder
flag.BuildString(&sb)
if got := sb.String(); got != want {
errs <- got
return
}
}
}()
}
wg.Wait()
close(errs)
for got := range errs {
t.Fatalf("unexpected BuildString output %q, want %q", got, want)
}
}
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