Decoration does not work

[ra250416]

When using proxy stubs, neither the responses[$].proxy.addDecorateBehavior nor responses[$].behaviors.decorate capabilities have any effect.

e.g.:

{
    "protocol": "graphql",
    "port": {{graphql-port}},
    "name": "GraphQL Backend",
    "schemaEndpoint": "{{gql-schema-endpoint}}",
    "stubs": [
        {
            "responses": [
                {
                    "proxy": {
                        "mode": "proxyOnce",
                        "to": "{{gql-schema-endpoint}}"
                    },
                     "behaviors": [
                        {
                            "decorate": "config => { config.logger.info('Decorator invoked'); }"
                        }
                    ]
                }
            ]
            
        }
    ]
}

or

{
    "protocol": "graphql",
    "port": {{graphql-port}},
    "name": "GraphQL Backend",
    "schemaEndpoint": "{{gql-schema-endpoint}}",
    "stubs": [
        {
            "responses": [
                {
                    "proxy": {
                        "mode": "proxyOnce",
                        "to": "{{gql-schema-endpoint}}",
                        "addDecorateBehavior": "config => { config.logger.info('Decorator invoked'); }"

                    }
                }
            ]
        }
    ]
}

Upon invoking that stub, I would expect to see a message in the mountebank console/logs, but nothing appears.

[ra250416]

It seems this might be an issue with mountebank itself. Please disregard.

[ra250416]

After some investigation, it looks like the addDecorateBehavior method isn't working on mountebank itself, but the behaviors[$].decorate method does work on mountebank with the http protocol, but is broken for graphql.