@Test
public void toJsonReturnsExpected() {

    final AttributeDeleted underTest = AttributeDeleted.of(TestConstants.Thing.THING_ID, KNOWN_ATTRIBUTE_POINTER,
            TestConstants.Thing.REVISION_NUMBER, TestConstants.TIMESTAMP, TestConstants.EMPTY_DITTO_HEADERS,
            TestConstants.METADATA);
    final JsonObject actualJson = underTest.toJson(FieldType.regularOrSpecial());
    assertThat(actualJson).isEqualTo(KNOWN_JSON);
}