test(server): auth tests (#6135)

packages/backend/server/src/fundamentals/prisma/index.ts

@@ -6,7 +6,13 @@ import { PrismaService } from './service';
 // only `PrismaClient` can be injected
 const clientProvider: Provider = {
   provide: PrismaClient,
-  useClass: PrismaService,
+  useFactory: () => {
+    if (PrismaService.INSTANCE) {
+      return PrismaService.INSTANCE;
+    }
+
+    return new PrismaService();
+  },
 };
 
 @Global()

packages/backend/server/src/fundamentals/prisma/service.ts

@@ -19,6 +19,9 @@ export class PrismaService
   }
 
   async onModuleDestroy(): Promise<void> {
-    await this.$disconnect();
+    if (!AFFiNE.node.test) {
+      await this.$disconnect();
+      PrismaService.INSTANCE = null;
+    }
   }
 }