fix(MongoMemoryReplSet): register listener for event "beforeExit" inside "start"

Author: hasezoey

packages/mongodb-memory-server-core/src/MongoMemoryReplSet.ts

@@ -134,8 +134,6 @@ export class MongoMemoryReplSet extends EventEmitter {
     this.binaryOpts = { ...opts.binary };
     this.instanceOpts = opts.instanceOpts ?? [];
     this.replSetOpts = { ...opts.replSet };
-
-    process.once('beforeExit', this.stop);
   }
 
   /**
@@ -320,6 +318,7 @@ export class MongoMemoryReplSet extends EventEmitter {
     await Promise.all(servers.map((s) => s.start()));
     this.servers = servers;
     await this._initReplSet();
+    process.once('beforeExit', this.stop);
   }
 
   /**

packages/mongodb-memory-server-core/src/__tests__/replset-single-test.ts

@@ -196,10 +196,6 @@ describe('MongoMemoryReplSet', () => {
     beforeEach(() => {
       replSet = new MongoMemoryReplSet();
     });
-    afterAll(async () => {
-      // to clean up event listeners
-      await replSet.stop();
-    });
     it('"get state" should match "_state"', () => {
       // @ts-expect-error
       expect(replSet.state).toEqual(replSet._state);