AWS CDK Jest Unit Test Resource Has DeletionPolicy - jestjs

Question

In the AWS CDK, I can write a Jest unit test to test if a resource has a specific property. But how do I test a resource DeletionPolicy value which is NOT a property?
cdk.out/example.template.json (simplified)
"AppsUserPool8FD9D0C0": {
"Type": "AWS::Cognito::UserPool",
"Properties": {
"UserPoolName": "test",
...
},
"UpdateReplacePolicy": "Retain",
"DeletionPolicy": "Retain",
"Metadata": {}
}
Jest unit test passes for property (simplified)
expect(stack).toHaveResourceLike('AWS::Cognito::UserPool', {
"UserPoolName": "test"
});
Jest unit test fails for DeletionPolicy (simplified)
expect(stack).toHaveResourceLike('AWS::Cognito::UserPool', {
"DeletionPolicy": "Retain"
});

Answer 1

You can use the following example
https://github.com/aws/aws-cdk/blob/775a0c930a680f8a52bb4a40084d07492f7f9fee/packages/%40aws-cdk/aws-cloudformation/test/test.resource.ts#L57
You can use haveResouce() with parameter ResourcePart.CompleteDefinition
snippet from the example
expect(stack).to(haveResource('AWS::CloudFormation::CustomResource', {
DeletionPolicy: 'Retain',
UpdateReplacePolicy: 'Retain',
}, ResourcePart.CompleteDefinition));

Answer 2

Updated snippet for CDK 2.x
const template = Template.fromStack(stack);
template.hasResource('AWS::Cognito::UserPool', {
DeletionPolicy: 'Retain',
UpdateReplacePolicy: 'Retain',
});

Answer 3

Here's an updated snippet confirmed working on CDK version: 1.107.0
import { ResourcePart } from '#aws-cdk/assert';
test('stack has correct policies', async () => {
expect(stack).toHaveResource('AWS::Cognito::UserPool', {
DeletionPolicy: 'Retain',
UpdateReplacePolicy: 'Retain',
}, ResourcePart.CompleteDefinition);
});