Seeking advice on testing object for optional fields

import { Schema } from '@effect/schema'

export const Asset = Schema.struct({
  id: Schema.number,
  name: Schema.string,
  subscriptions: Schema.optional(
    Schema.struct({
      location: Schema.struct({
        expirationDate: Schema.string,
        providerName: Schema.string,
        providerReference: Schema.string
      }),
      weather: Schema.optional(
        Schema.struct({
          expirationDate: Schema.string,
          providerName: Schema.string
        })
      )
    })
  )
})