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

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

  - do:
      indices.refresh: {}

  - do:
      explain:
          index:  test_1
          type:   test
          id:     1
          body:
            query:
              match_all: {}

  - is_true: matched
  - is_true: ok
  - match: { explanation.value: 1 }