OpenSearch/rest-api-spec/test/mlt/10_basic.yaml

---
"Basic mlt":
  - do:
      index:
          index:  test_1
          type:   test
          id:     1
          body:   { foo: bar, title: howdy }

  - do:
      indices.refresh: {}

  - do:
      mlt:
          index:  test_1
          type:   test
          id:     1
          mlt_fields: title
        
  - match: {hits.total: 0}