@Test
public void toJsonReturnsExpected() {

    final CreateThingResponse underTestCreated =
            CreateThingResponse.of(TestConstants.Thing.THING, TestConstants.EMPTY_DITTO_HEADERS);
    final JsonObject actualJsonCreated = underTestCreated.toJson(FieldType.regularOrSpecial());
    assertThat(actualJsonCreated).isEqualTo(KNOWN_JSON_CREATED);
}