@Test
public void createThingWithoutModified() {

    final Thing thing = ImmutableThing.of(THING_ID, ACL, ATTRIBUTES, FEATURES, LIFECYCLE, REVISION, null, CREATED,
            METADATA);
    assertThat(thing)
            .hasId(THING_ID)
            .hasAcl(ACL)
            .hasAttributes(ATTRIBUTES)
            .hasFeatures(FEATURES)
            .hasLifecycle(LIFECYCLE)
            .hasRevision(REVISION)
            .hasCreated(CREATED)
            .hasMetadata(METADATA)
            .hasNoModified();
}