我正试图用Sinon嘲笑SES,但面临下面的错误。尝试使用aws-sdk-mock,但它不起作用。
Error: TypeError: Cannot stub non-existent own property sendEmail
测试类的代码片段:
import * as AWS from 'aws-sdk';
const sandbox = sinon.createSandbox();
sandbox.stub(AWS.SES, 'sendEmail').returns({promise: () => true});
实际课程:
import * as AWS from 'aws-sdk';
import * as _ from 'lodash';
export async function sendAlertMailOnFailure(status:any)
{
// load AWS SES
var ses = new AWS.SES();
const params = {
Destination: {
ToAddresses: <to_address>
},
Message: {...},
Source: <sender_address>
}
ses.sendEmail(params, (err, data) => {
if (err) {
log.error("Error sending mail::");
log.error(err, err.stack);
}
})
}
有没有办法用Sinon或aws-sdk-mock模拟SES?
你需要在prototype
中使用AWS
来存根:
import AWS from 'aws-sdk';
const sandbox = sinon.createSandbox();
sandbox.stub(AWS.prototype, 'SES').returns({
sendEmail: () => {
return true;
}
});
该错误似乎表明AWS
正在被导入为undefined
。
可能是您的ES6编译器没有自动转换此行:
import AWS from 'aws-sdk';
...将aws-sdk
中的所有内容导入AWS
。
把它改成这个:
import * as AWS from 'aws-sdk';
......这可能会解决问题。
(免责声明:我无法重现我的环境中使用Babel
v7编译并自动处理任何一种方法的错误)
使用require和不使用原型。这对我来说是模拟DynamoDB的。
const aws = require('aws-sdk');
const sinon = require('sinon');
const sandbox = sinon.createSandbox();
this.awsStub = sandbox.stub(aws, 'DynamoDB').returns({
query: function() {
return {
promise: function() {
return {
Items: []
};
}
};
}
});
包:
“aws-sdk”:“^ 2.453.0”
“否则”:“^ 7.3.2”
我在这里的答案不是SES
的直接解决方案,但它是一个工作解决方案,我用来嘲笑DynamoDB.DocumentClient
和SQS
。也许你可以在我的单元测试中调整SES
和其他aws-sdk
客户端的工作示例。
我花了好几个小时试图让AWS SQS模拟工作,而没有诉诸aws-sdk-mock
要求在函数内导入aws-sdk
客户端。
对AWS.DynamoDB.DocumentClient
的嘲弄很容易,但AWS.SQS
嘲笑让我难过,直到我遇到使用rewire的建议。
我的lambda将错误消息移动到SQS FailQueue(而不是让Lambda失败并将消息返回到常规队列进行重试,然后在maxRetries之后返回DeadLetterQueue)。模拟以下SQS方法所需的单元测试:
SQS.getQueueUrl
SQS.sendMessage
SQS.deleteMessage
我会尽量保持这个示例代码尽可能简洁,同时仍然包括所有相关部分:
我的AWS Lambda的片段(index.js):
const AWS = require('aws-sdk');
AWS.config.update({region:'eu-west-1'});
const docClient = new AWS.DynamoDB.DocumentClient();
const sqs = new AWS.SQS({ apiVersion: '2012-11-05' });
// ...snip
简明的Lambda事件记录(event.json)
{
"valid": {
"Records": [{
"messageId": "c292410d-3b27-49ae-8e1f-0eb155f0710b",
"receiptHandle": "AQEBz5JUoLYsn4dstTAxP7/IF9+T1S994n3FLkMvMmAh1Ut/Elpc0tbNZSaCPYDvP+mBBecVWmAM88SgW7iI8T65Blz3cXshP3keWzCgLCnmkwGvDHBYFVccm93yuMe0i5W02jX0s1LJuNVYI1aVtyz19IbzlVksp+z2RxAX6zMhcTy3VzusIZ6aDORW6yYppIYtKuB2G4Ftf8SE4XPzXo5RCdYirja1aMuh9DluEtSIW+lgDQcHbhIZeJx0eC09KQGJSF2uKk2BqTGvQrknw0EvjNEl6Jv56lWKyFT78K3TLBy2XdGFKQTsSALBNtlwFd8ZzcJoMaUFpbJVkzuLDST1y4nKQi7MK58JMsZ4ujZJnYvKFvgtc6YfWgsEuV0QSL9U5FradtXg4EnaBOnGVTFrbE18DoEuvUUiO7ZQPO9auS4=",
"body": "{ \"key1\": \"value 1\", \"key2\": \"value 2\", \"key3\": \"value 3\", \"key4\": \"value 4\", \"key5\": \"value 5\" }",
"attributes": {
"ApproximateReceiveCount": "1",
"SentTimestamp": "1536763724607",
"SenderId": "AROAJAAXYIAN46PWMV46S:[email protected]",
"ApproximateFirstReceiveTimestamp": "1536763724618"
},
"messageAttributes": {},
"md5OfBody": "e5b16f3a468e6547785a3454cfb33293",
"eventSource": "aws:sqs",
"eventSourceARN": "arn:aws:sqs:eu-west-1:123456789012:sqs-queue-name",
"awsRegion": "eu-west-1"
}]
}
}
简化的单元测试文件(test / index.test.js):
const AWS = require('aws-sdk');
const expect = require('chai').expect;
const LamdbaTester = require('lambda-tester');
const rewire = require('rewire');
const sinon = require('sinon');
const event = require('./event');
const lambda = rewire('../index');
let sinonSandbox;
function mockGoodSqsMove() {
const promiseStubSqs = sinonSandbox.stub().resolves({});
const sqsMock = {
getQueueUrl: () => ({ promise: sinonSandbox.stub().resolves({ QueueUrl: 'queue-url' }) }),
sendMessage: () => ({ promise: promiseStubSqs }),
deleteMessage: () => ({ promise: promiseStubSqs })
}
lambda.__set__('sqs', sqsMock);
}
describe('handler', function () {
beforeEach(() => {
sinonSandbox = sinon.createSandbox();
});
afterEach(() => {
sinonSandbox.restore();
});
describe('when SQS message is in dedupe cache', function () {
beforeEach(() => {
// mock SQS
mockGoodSqsMove();
// mock DynamoDBClient
const promiseStub = sinonSandbox.stub().resolves({'Item': 'something'});
sinonSandbox.stub(AWS.DynamoDB.DocumentClient.prototype, 'get').returns({ promise: promiseStub });
});
it('should return an error for a duplicate message', function () {
return LamdbaTester(lambda.handler)
.event(event.valid)
.expectReject((err, additional) => {
expect(err).to.have.property('message', 'Duplicate message: {"Item":"something"}');
});
});
});
});