使用Jest模拟AWS-SDK-mock与AWS-SDK-Mock [英] Mocking aws-sdk promises with aws-sdk-mock using jest
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问题描述
能否请您查看下面的代码,并告诉我它有什么问题?该代码会在5秒钟后超时,但是根据官方描述,我希望它可以正常运行.
can you please see below code and tell me what is wrong with it? The code times out after 5 seconds, but I would expect it to run just fine, as per official description.
有人看到根本上的错误吗?
Does anyone see what is fundamentally wrong?
import * as AWS from "aws-sdk-mock";
import * as _AWS from "aws-sdk";
beforeAll(async (done) => {
//get requires env vars
});
describe("the module", () => {
it("should read from the database", async () => {
AWS.mock('DynamoDB.DocumentClient', 'get', (error, callback) => { callback(null, "got it")});
expect(await (new _AWS.DynamoDB.DocumentClient()).get({TableName:"", Key: {pk: "foo", sk: "bar"}}).promise()).toBe("got it");
});
});
afterAll(() => {
AWS.restore();
});
推荐答案
我终于找到了可行的变体:
i finally found the working variant:
import * as AWSMock from "aws-sdk-mock";
import * as AWS from "aws-sdk";
import { GetItemInput } from "aws-sdk/clients/dynamodb";
beforeAll(async (done) => {
//get requires env vars
done();
});
describe("the module", () => {
it("should mock getItem from DynamoDB", async () => {
AWSMock.setSDKInstance(AWS);
AWSMock.mock('DynamoDB', 'getItem', (params: GetItemInput, callback: Function) => {
console.log('DynamoDB', 'getItem', 'mock called');
callback(null, {pk: "foo", sk: "bar"});
})
let input:GetItemInput = { TableName: '', Key: {} };
const dynamodb = new AWS.DynamoDB({apiVersion: '2012-08-10'});
expect(await dynamodb.getItem(input).promise()).toStrictEqual( { pk: 'foo', sk: 'bar' });
AWSMock.restore('DynamoDB');
});
it("should mock reading from DocumentClient", async () => {
AWSMock.setSDKInstance(AWS);
AWSMock.mock('DynamoDB.DocumentClient', 'get', (params: GetItemInput, callback: Function) => {
console.log('DynamoDB.DocumentClient', 'get', 'mock called');
callback(null, {pk: "foo", sk: "bar"});
})
let input:GetItemInput = { TableName: '', Key: {} };
const client = new AWS.DynamoDB.DocumentClient({apiVersion: '2012-08-10'});
expect(await client.get(input).promise()).toStrictEqual( { pk: 'foo', sk: 'bar' });
AWSMock.restore('DynamoDB.DocumentClient');
});
});
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