Mock CDK Synth Output in Python for Template Testing

import json
from unittest.mock import MagicMock

def mock_cdk_synth() -> dict:
    """Simulate AWS CDK synth output for a simple S3 bucket."""
    cdk_app = MagicMock()
    cdk_app.synth.return_value.template = {
        "Resources": {
            "MyBucket": {
                "Type": "AWS::S3::Bucket",
                "Properties": {
                    "BucketName": "mock-cdk-bucket",
                    "VersioningConfiguration": {"Status": "Enabled"}
                }
            }
        },
        "Outputs": {
            "BucketArn": {
                "Value": {"Fn::GetAtt": ["MyBucket", "Arn"]}
            }
        }
    }
    
    template = cdk_app.synth().template
    
    return {
        "Resources": template["Resources"],
        "Outputs": template["Outputs"]
    }

if __name__ == "__main__":
    result = mock_cdk_synth()
    print(json.dumps(result, indent=2))
    print(f"\nResource count: {len(result['Resources'])}")