chore(jest): setup jest and add test for lmdbkvstore

jest.config.json

@@ -0,0 +1,17 @@
+{
+  "preset": "ts-jest",
+  "testEnvironment": "node",
+  "extensionsToTreatAsEsm": [".ts"],
+  "moduleNameMapper": {
+    "^(\\.{1,2}/.*)\\.js$": "$1"
+  },
+  "transform": {
+    "^.+\\.m?[tj]sx?$": [
+      "ts-jest",
+      {
+        "useESM": true
+      }
+    ]
+  },
+  "moduleFileExtensions": ["ts", "js", "json", "node"]
+}

package.json

@@ -30,6 +30,7 @@
     "@types/cors": "^2.8.16",
     "@types/express": "^4.17.17",
     "@types/express-prometheus-middleware": "^1.2.1",
+    "@types/jest": "^29.5.12",
     "@types/node": "^16.11.7",
     "@types/swagger-ui-express": "^4.1.3",
     "@typescript-eslint/eslint-plugin": "^5.26.0",
@@ -41,9 +42,11 @@
     "eslint-plugin-mocha": "^10.1.0",
     "eslint-plugin-prettier": "^4.0.0",
     "eslint-plugin-unicorn": "^45.0.2",
+    "jest": "^29.7.0",
     "nodemon": "^3.1.0",
     "prettier": "^2.6.2",
     "rimraf": "^3.0.2",
+    "ts-jest": "^29.1.2",
     "ts-node": "^10.9.2",
     "typescript": "^5.3.0"
   },

src/cache/lmdb-kv-store.test.ts

@@ -0,0 +1,38 @@
+/**
+ * AR.IO ArNS Resolver
+ * Copyright (C) 2023 Permanent Data Solutions, Inc. All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+import { LmdbKVStore } from './lmdb-kv-store.js';
+
+describe('LmdbKVStore', () => {
+  const cache = new LmdbKVStore({
+    dbPath: './data/test',
+    ttlSeconds: 1,
+  });
+
+  it('should set and get value', async () => {
+    await cache.set('test', Buffer.from('hello'));
+    const value = await cache.get('test');
+    expect(value).toEqual(Buffer.from('hello'));
+  });
+
+  it('should remove a value once ttl has expired', async () => {
+    await cache.set('expire', Buffer.from('hello'));
+    await new Promise((resolve) => setTimeout(resolve, 1000));
+    const value = await cache.get('expire');
+    expect(value).toBeUndefined();
+  });
+});