无法捕获从开玩笑的模拟实现引发的错误

Question

Jest在throw new Error();行抱怨。它只是在new关键字下面显示一个错误，而没有提供任何更多信息。为什么我的测试由于抛出错误而失败？我认为我正在处理代码中的错误。

测试

import { QueueService } from '../Queue.service';
import { PersistenceDatabaseRepository } from '../..';

describe('Queue.service', () => {
    let queueService: QueueService;
    let persistenceRepositoryMock: Partial<PersistenceDatabaseRepository>;


    describe('when persistence layer throws errors', () => {
        describe('when get throws error', () => {
            it('should reject promises and empty queue', async () => {
                persistenceRepositoryMock = {
                    get: jest.fn().mockImplementation(() => {
                        throw new Error();
                    }),
                };

                queueService = new QueueService(
                    persistenceRepositoryMock as PersistenceDatabaseRepository,
                );

                const promise1 = queueService.enqueue('1', 'delete');
                const promise2 = queueService.enqueue('1', 'delete');
                await Promise.all([promise1, promise2]);

                expect(promise1).toThrow();
            });
        });
    });
});

已捕获错误的部分经过测试的代码。请参见try/catch块。

private async commit(id: Id, requests: Array<IChangeRequest<any>>) {
    let entity: IEntity;

    try {
        entity = await this.persistenceRepository.get(id);
    } catch (err) {
        console.log('get throw');
        for (const r of requests) {
            r.reject(err);
        }
        return;
    }

    const { updatesToResolve, deleteToResolve, changesToReject } = this.groupQueueByCommitCase(
        requests,
    );

    if (updatesToResolve) {
        entity = await this.resolveUpdates(entity, updatesToResolve);
    }

    if (deleteToResolve) {
        await this.resolveDelete(entity._id, entity._rev, deleteToResolve);
    }

    if (changesToReject) {
        await this.rejectChanges(changesToReject);
    }
}