я наконец нашел рабочий вариант:
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');
});
});