code: @Test public void should_instanciate_embedded_id_with_partition_key_using_default_constructor() throws Exception {
    Long partitionKey=RandomUtils.nextLong();
    Field userIdField=EmbeddedKey.class.getDeclaredField("userId");
    PropertyMeta idMeta=PropertyMetaTestBuilder.valueClass(EmbeddedKey.class).compFields(userIdField).build();
    Object actual=invoker.instantiateEmbeddedIdWithPartitionComponents(idMeta,Arrays.<Object>asList(partitionKey));
    assertThat(actual).isNotNull();
    EmbeddedKey embeddedKey=(EmbeddedKey)actual;
    assertThat(embeddedKey.getUserId()).isEqualTo(partitionKey);
    assertThat(embeddedKey.getName()).isNull();
  }
  