improvements + review fixes

backend/e2e-test/mocks/keystore.ts

@@ -1,7 +1,9 @@
-import { TKeyStoreFactory } from "@app/keystore/keystore";
-import { Lock } from "@app/lib/red-lock";
 import RE2 from "re2";
 
+import { TKeyStoreFactory } from "@app/keystore/keystore";
+import { delay as delayMs } from "@app/lib/delay";
+import { Lock } from "@app/lib/red-lock";
+
 export const mockKeyStore = (): TKeyStoreFactory => {
   const store: Record<string, string | number | Buffer> = {};
 
@@ -19,16 +21,26 @@ export const mockKeyStore = (): TKeyStoreFactory => {
       delete store[key];
       return 1;
     },
-    deleteItems: async (pattern) => {
-      const regex = new RE2(pattern.replace(/\*/g, ".*"));
-      let deletedCount = 0;
-      for (const key of Object.keys(store)) {
-        if (regex.test(key)) {
-          delete store[key];
-          deletedCount += 1;
+    deleteItems: async ({ pattern, batchSize = 500, delay = 1500, jitter = 200 }) => {
+      const regex = new RE2(`^${pattern.replace(/[-[\]/{}()+?.\\^$|]/g, "\\$&").replace(/\*/g, ".*")}$`);
+      let totalDeleted = 0;
+      const keys = Object.keys(store);
+
+      for (let i = 0; i < keys.length; i += batchSize) {
+        const batch = keys.slice(i, i + batchSize);
+
+        for (const key of batch) {
+          if (regex.test(key)) {
+            delete store[key];
+            totalDeleted += 1;
+          }
         }
+
+        // eslint-disable-next-line no-await-in-loop
+        await delayMs(Math.max(0, delay + Math.floor((Math.random() * 2 - 1) * jitter)));
       }
-      return deletedCount;
+
+      return totalDeleted;
     },
     getItem: async (key) => {
       const value = store[key];