Simple CDK Testing Failing - amazon-web-services

Question

this is my set up
//bin
#!/usr/bin/env node
import * as cdk from 'aws-cdk-lib';
import {Testing} from '../lib/index';
const app = new cdk.App();
new Testing(app, 'Testing');
//lib
import {Duration, Stack, StackProps} from 'aws-cdk-lib'
export class Testing extends Stack {
constructor(scope: Construct, id: string, props?: StackProps) {
super(scope, id, props);
// Define construct contents here
// example resource
const queue = new sqs.Queue(this, 'TestingQueue', {
visibilityTimeout: Duration.seconds(300)
});
}
}
//test
import {Stack} from 'aws-cdk-lib/core';
import sqs = require ('../lib/index');
import'#aws-cdk/assert/jest'
test('SQS Queue Created', () => {
const stack = new Stack();
new sqs.Testing(stack, 'sqs');
expect(stack).toHaveResource('AWS::SQS::Queue')
});
//npm-package
"devDependencies": {
"#types/jest": "^26.0.10",
"#types/node": "10.17.27",
"aws-cdk-lib": "2.1.0",
"constructs": "^10.0.0",
"jest": "^26.4.2",
"ts-jest": "^26.2.0",
"typescript": "~3.9.7"
},
"peerDependencies": {
"#aws-cdk/assert": "^2.1.0",
"aws-cdk-lib": "2.1.0",
"constructs": "^10.0.0"
},
"jest": {
"moduleFileExtensions": [
"js"
]
}
I get this when I run: npm run build; npm run test.
None of 0 resources matches resource 'AWS::SQS::Queue' with { "$anything": true }.
I don't understand???
This should be straight forward. I can see the resource in cdk.out, the stack synthesisez, the stack deploys.
It only happens with fine grained assertions. The snapshot works.

Answer 1

You are asserting on the empty stack. Assert on Testing instead.
test('SQS Queue Created', () => {
const stack = new Stack(); // stack is empty, has no queue
const iHaveAQueue = new sqs.Testing(stack, 'sqs');
expect(stack).toHaveResource('AWS::SQS::Queue') // will fail
expect(iHaveAQueue).toHaveResource('AWS::SQS::Queue') // will pass
});