@Test
public void toJsonReturnsExpected() {

    final DeleteSubjectResponse underTestCreated =
            DeleteSubjectResponse.of(TestConstants.Policy.POLICY_ID, TestConstants.Policy.LABEL,
            TestConstants.Policy.SUBJECT_ID, TestConstants.EMPTY_DITTO_HEADERS);
    final JsonObject actualJsonCreated = underTestCreated.toJson(FieldType.regularOrSpecial());
    assertThat(actualJsonCreated).isEqualTo(KNOWN_JSON);
}