fix(backend/DriveService): gracely skip when getting NoSuchKey error from S3 (#10292)

* fix(backend/DriveService): gracely skip when getting NoSuchKey error from S3

* Update CHANGELOG.md

* import type

packages/backend/test/unit/DriveService.ts

@@ -0,0 +1,55 @@
+process.env.NODE_ENV = 'test';
+
+import { jest } from '@jest/globals';
+import { Test } from '@nestjs/testing';
+import { GlobalModule } from '@/GlobalModule.js';
+import { DriveService } from '@/core/DriveService.js';
+import { CoreModule } from '@/core/CoreModule.js';
+import { S3Service } from '@/core/S3Service';
+import type { Meta } from '@/models';
+import type { DeleteObjectOutput } from 'aws-sdk/clients/s3';
+import type { AWSError } from 'aws-sdk/lib/error';
+import type { PromiseResult, Request } from 'aws-sdk/lib/request';
+import type { TestingModule } from '@nestjs/testing';
+
+describe('DriveService', () => {
+	let app: TestingModule;
+	let driveService: DriveService;
+
+	beforeEach(async () => {
+		app = await Test.createTestingModule({
+			imports: [GlobalModule, CoreModule],
+			providers: [DriveService, S3Service],
+		}).compile();
+		app.enableShutdownHooks();
+		driveService = app.get<DriveService>(DriveService);
+
+		const s3Service = app.get<S3Service>(S3Service);
+		const s3 = s3Service.getS3({} as Meta);
+
+		// new S3() surprisingly does not return an instance of class S3.
+		// Let's use getPrototypeOf here to get a real prototype, since spying on S3.prototype doesn't work.
+		// TODO: Use `aws-sdk-client-mock` package when upgrading to AWS SDK v3.
+		jest.spyOn(Object.getPrototypeOf(s3), 'deleteObject').mockImplementation(() => {
+			// Roughly mock AWS request object
+			return {
+				async promise(): Promise<PromiseResult<DeleteObjectOutput, AWSError>> {
+					const err = new Error('mock') as AWSError;
+					err.code = 'NoSuchKey';
+					throw err;
+				},
+			} as Request<DeleteObjectOutput, AWSError>;
+		});
+	});
+
+	describe('Object storage', () => {
+		test('delete a file with no valid key', async () => {
+			try {
+				await driveService.deleteObjectStorageFile('lol no way');
+			} catch (err: any) {
+				console.log(err.cause);
+				throw err;
+			}
+		});
+	});
+});