class GovukSchemas::RandomSchemaGenerator

def generate_random_object(subschema)
  document = {}
  one_of_sample = subschema.fetch("oneOf", []).sample(random: @random) || {}
  (subschema["properties"] || {}).each do |attribute_name, attribute_properties|
    # TODO: When the schema contains `subschema['minProperties']` we always
    # populate all of the keys in the hash. This isn't quite random, but I
    # haven't found a nice way yet to ensure there's at least n elements in
    # the hash.
    should_generate_value = @generator.bool \
      || subschema["required"].to_a.include?(attribute_name) \
      || (one_of_sample["required"] || {}).to_a.include?(attribute_name) \
      || (one_of_sample["properties"] || {}).keys.include?(attribute_name) \
      || subschema["minProperties"] \
    next unless should_generate_value
    one_of_properties = (one_of_sample["properties"] || {})[attribute_name]
    document[attribute_name] = generate_value(one_of_properties || attribute_properties)
  end
  document
end