添加自动文件压缩的实现

loggerx_mustsync_test.go

@@ -0,0 +1,55 @@
+package loggerx_test
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"sync"
+	"testing"
+
+	"github.com/yuninks/loggerx"
+)
+
+// MustSync 与写入并发时不能丢日志（模拟外部定时刷盘的用法）
+func TestMustSyncConcurrentNoLoss(t *testing.T) {
+	for round := 0; round < 5; round++ {
+		dir := t.TempDir()
+		l := loggerx.NewLogger(context.Background(), loggerx.SetDir(dir))
+		ctx := context.Background()
+
+		const n = 2000
+		var wg sync.WaitGroup
+		wg.Add(2)
+
+		// 持续写入
+		go func() {
+			defer wg.Done()
+			for i := 0; i < n; i++ {
+				l.Infof(ctx, "MS-%d", i)
+			}
+		}()
+		// 持续外部刷盘（这正是 MustSync 的公开用途）
+		go func() {
+			defer wg.Done()
+			for i := 0; i < 300; i++ {
+				_ = l.MustSync()
+			}
+		}()
+		wg.Wait()
+
+		if err := l.Close(); err != nil {
+			t.Fatalf("第 %d 轮 Close: %v", round, err)
+		}
+
+		content := readAllLogs(t, dir)
+		missing := 0
+		for i := 0; i < n; i++ {
+			if !strings.Contains(content, fmt.Sprintf(`MS-%d"`, i)) {
+				missing++
+			}
+		}
+		if missing > 0 {
+			t.Errorf("第 %d 轮：写入 %d 条，丢失 %d 条", round, n, missing)
+		}
+	}
+}