TypeError: AWS.SecretsManager不是构造函数

Question

我正在尝试测试以下代码片段

import * as AWS from 'aws-sdk';
export const fetchSSMCertKey = async (certKeyArn: string): Promise<string> => {
    const secretsmanager: AWS.SecretsManager = new AWS.SecretsManager();
    const data = await secretsmanager.getSecretValue({ SecretId: certKeyArn }).promise();
    if (!data.SecretString) {
        throw new Error();
    } else {
        return data.SecretString;
    }
};

使用这个滑稽的测试代码

import * as types from '../../../types';
import type { SecretsManager } from 'aws-sdk';
jest.mock('aws-sdk');
describe('fetchSSMCertKey', () => {
    it('returns a value of secret', async () => {
        const secretValue = '---cert---key---value---';
        const mockSecretsManager = ({} as unknown) as SecretsManager;
        const mockPromise = Promise.resolve({ SecretString: secretValue });
        const mockPromiseFunc = jest.fn().mockReturnValue(mockPromise);
        mockSecretsManager.getSecretValue = jest.fn().mockReturnValue({ promise: mockPromiseFunc });
        expect(await types.fetchSSMCertKey('find-me')).toEqual(secretValue);
    });
});

但是我不断地得到错误，运行代码：

Test suite failed to run

    TypeError: AWS.SecretsManager is not a constructor

我的模拟准备缺少的是什么。有没有办法以不同的方式插入SecretManager？

Answer 1

aws-sdk使用CommonJS模块系统，因此不能使用*导入(即import * as AWS from 'aws-sdk';)。相反，你应该这样做：

import AWS from 'aws-sdk';

const secretsmanager = new AWS.SecretsManager();