OpenSearch/rest-api-spec/test/update/40_routing.yaml

---
"Routing":

 - do:
      update:
          index:   test_1
          type:    test
          id:      1
          routing: 5
          body:
            doc:        { foo: baz }
            upsert:     { foo: bar }

 - do:
      get:
          index:   test_1
          type:    test
          id:      1
          routing: 5
          fields:  _routing

 - match: { fields._routing:  "5"}

 - do:
      catch:      missing
      update:
          index:   test_1
          type:    test
          id:      1
          body:
            doc:        { foo: baz }

 - do:
      update:
          index:   test_1
          type:    test
          id:      1
          routing: 5
          fields:  foo
          body:
            doc:        { foo: baz }

 - match: { get.fields.foo: baz }