feat: add option to prune old test run directories, keeping a configurable maximum number.

.gitignore

@@ -68,6 +68,10 @@ pnpm-lock.yaml
 static/admin/
 internal/webui/assets/admin/
 
+# Go compiled binaries
+ds2api
+ds2api-tests
+
 # Environment
 .env.local
 .env.*.local

TESTING.md

@@ -61,7 +61,8 @@ go run ./cmd/ds2api-tests \
   --port 0 \
   --timeout 120 \
   --retries 2 \
-  --no-preflight=false
+  --no-preflight=false \
+  --keep 5
 ```
 
 | 参数 | 说明 | 默认值 |
@@ -73,6 +74,17 @@ go run ./cmd/ds2api-tests \
 | `--timeout` | 单个请求超时秒数 | `120` |
 | `--retries` | 网络/5xx 请求重试次数 | `2` |
 | `--no-preflight` | 跳过 preflight 检查 | `false` |
+| `--keep` | 保留最近几次测试结果（`0` = 全部保留） | `5` |
+
+---
+
+## 自动清理 | Auto Cleanup
+
+每次测试运行完成后，程序会自动扫描输出目录（`--out`），按时间排序保留最近 `--keep` 次运行的结果，超出部分自动删除。
+
+- 默认保留 **5** 次
+- 设置 `--keep 0` 可关闭自动清理
+- 被删除的旧运行目录会打印日志提示
 
 ---
 

cmd/ds2api-tests/main.go

@@ -21,6 +21,7 @@ func main() {
 	flag.IntVar(&timeoutSeconds, "timeout", int(opts.Timeout.Seconds()), "Per-request timeout in seconds")
 	flag.IntVar(&opts.Retries, "retries", opts.Retries, "Retry count for network/5xx requests")
 	flag.BoolVar(&opts.NoPreflight, "no-preflight", opts.NoPreflight, "Skip preflight checks")
+	flag.IntVar(&opts.MaxKeepRuns, "keep", opts.MaxKeepRuns, "Max test runs to keep (0 = keep all)")
 	flag.Parse()
 
 	if timeoutSeconds <= 0 {

internal/testsuite/runner.go

@@ -31,6 +31,7 @@ type Options struct {
 	Timeout     time.Duration
 	Retries     int
 	NoPreflight bool
+	MaxKeepRuns int
 }
 
 type runSummary struct {
@@ -161,6 +162,7 @@ func DefaultOptions() Options {
 		Timeout:     120 * time.Second,
 		Retries:     2,
 		NoPreflight: false,
+		MaxKeepRuns: 5,
 	}
 }
 
@@ -212,6 +214,11 @@ func Run(ctx context.Context, opts Options) error {
 		return err
 	}
 
+	// Prune old test runs, keeping only the most recent N.
+	if err := r.pruneOldRuns(); err != nil {
+		r.warnings = append(r.warnings, "prune old runs: "+err.Error())
+	}
+
 	failed := 0
 	for _, cs := range r.results {
 		if !cs.Passed {
@@ -269,6 +276,52 @@ func (r *Runner) prepareRunDir() error {
 	return nil
 }
 
+// pruneOldRuns removes old test run directories, keeping the most recent MaxKeepRuns.
+// Run IDs use the format "20060102T150405Z", so alphabetical order == chronological order.
+func (r *Runner) pruneOldRuns() error {
+	keep := r.opts.MaxKeepRuns
+	if keep <= 0 {
+		return nil // 0 or negative means no pruning
+	}
+
+	entries, err := os.ReadDir(r.opts.OutputDir)
+	if err != nil {
+		return err
+	}
+
+	// Collect only directories (each run is a directory).
+	var runDirs []string
+	for _, e := range entries {
+		if !e.IsDir() {
+			continue
+		}
+		runDirs = append(runDirs, e.Name())
+	}
+
+	sort.Strings(runDirs)
+
+	if len(runDirs) <= keep {
+		return nil
+	}
+
+	// Remove oldest runs (those at the beginning of the sorted list).
+	toRemove := runDirs[:len(runDirs)-keep]
+	var errs []string
+	for _, name := range toRemove {
+		dirPath := filepath.Join(r.opts.OutputDir, name)
+		if err := os.RemoveAll(dirPath); err != nil {
+			errs = append(errs, fmt.Sprintf("remove %s: %v", name, err))
+		} else {
+			fmt.Fprintf(os.Stdout, "pruned old test run: %s\n", name)
+		}
+	}
+
+	if len(errs) > 0 {
+		return errors.New(strings.Join(errs, "; "))
+	}
+	return nil
+}
+
 func (r *Runner) runPreflight(ctx context.Context) error {
 	steps := [][]string{
 		{"go", "test", "./...", "-count=1"},