Is there a way to test Elasticsearch mutate locally?

I have written as a grok mutate as below to remove a particular pattern:

mutate {
        gsub => [ "message", "\nmytestpattern", "" ]
       }

But I am unable to test it locally without pushing the code to a logstash pipeline . Is there a way we can test mutate functions locally to see if the gsub is working as expected ?

You may use the Stack Management > Ingest Pipelines feature of Kibana. From there, you can create a new pipeline, add a gsub processor with your desired configuration, and then rely on the feature "Test pipeline" to verify how the processor behaves with some sample documents you provide