feat: 添加 retryRm 工具函数及测试

tests/helpers/cleanup.ts

@@ -0,0 +1,21 @@
+import { rm } from "node:fs/promises";
+
+const RETRY_CODES = new Set(["EBUSY", "EPERM"]);
+
+export async function retryRm(
+  path: string,
+  { maxRetries = 5, baseDelay = 100 }: { maxRetries?: number; baseDelay?: number } = {},
+): Promise<void> {
+  for (let attempt = 0; attempt <= maxRetries; attempt++) {
+    try {
+      await rm(path, { recursive: true, force: true });
+      return;
+    } catch (err: any) {
+      if (!RETRY_CODES.has(err.code) || attempt === maxRetries) {
+        throw err;
+      }
+      const delay = baseDelay * 2 ** attempt;
+      await new Promise((resolve) => setTimeout(resolve, delay));
+    }
+  }
+}