AWS CDK providing incorrect definitions for Jest testing on object properties-CodePudding

I've created an S3 bucket using the AWS CDK like so

new s3.Bucket(this, 'MyFirstBucket', {
      versioned: true,
      encryption: s3.BucketEncryption.KMS,
      blockPublicAccess: s3.BlockPublicAccess.BLOCK_ALL,
    });

But I'm not having much success writing Jest tests for it. I've tried to follow https://docs.aws.amazon.com/cdk/v2/guide/testing.html#Capturing but not really having anyluck. The s3.BlockPublicAccess.BLOCK_ALL returns {"blockPublicAccess": {"blockPublicAcls": true, "blockPublicPolicy": true, "ignorePublicAcls": true, "restrictPublicBuckets": true}}

but when I try to compare this in my tests the object is comprised of

..."PublicAccessBlockConfiguration": {"BlockPublicAcls": true, "BlockPublicPolicy": true, "IgnorePublicAcls": true, "RestrictPublicBuckets": true}...

I've managed to pass tests but only by copying content from the CDK.out json file, however I feel this is counterintuitive to how tests should be written. Below is my Test code, Any help would be much appreciated.

  expect(template).toHaveProperty("AWS::S3::Bucket", {
        blockPublicAccess: s3.BlockPublicAccess.BLOCK_ALL
    }) ```

CodePudding user response：

This is the expected behavior. The fine-grain assertions "test specific aspects of the generated AWS CloudFormation template". Templates have PascalCase property keys. So we can't assert against the camelCase keys in the Typescript CDK classes.

Not a problem! Simply convert the camelCase to PascalCase:

const blockAllAccess = s3.BlockPublicAccess.BLOCK_ALL as unknown as Record<string, string>;

const blockAllAccessPascal = Object.entries(blockAllAccess).reduce(
  (acc, [k, v]) => {
    acc[k[0].toUpperCase()   k.substring(1)] = v;
    return acc;
  }, {});

expect(bucketStack).toHaveResourceLike('AWS::S3::Bucket', {
  PublicAccessBlockConfiguration: blockAllAccessPascal,
});