elasticsearch/docs/reference/elasticsearch-plugins/discovery-gce-usage-testing.md

mapped_pages
https://www.elastic.co/guide/en/elasticsearch/plugins/current/discovery-gce-usage-testing.html

Testing GCE [discovery-gce-usage-testing]

Integrations tests in this plugin require working GCE configuration and therefore disabled by default. To enable tests prepare a config file elasticsearch.yml with the following content:

cloud:
  gce:
      project_id: es-cloud
      zone: europe-west1-a
discovery:
      seed_providers: gce

Replace project_id and zone with your settings.

To run test:

mvn -Dtests.gce=true -Dtests.config=/path/to/config/file/elasticsearch.yml clean test