@Test
public void toJsonReturnsExpected() {

    final PolicyEntriesModified underTest = PolicyEntriesModified.of(TestConstants.Policy.POLICY_ID,
            TestConstants.Policy.POLICY_ENTRIES, TestConstants.Policy.REVISION_NUMBER, TestConstants.TIMESTAMP,
            TestConstants.EMPTY_DITTO_HEADERS);
    final JsonObject actualJson = underTest.toJson(FieldType.regularOrSpecial());
    assertThat(actualJson).isEqualToIgnoringFieldDefinitions(KNOWN_JSON);
}