public class Entity {
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  @Column(name = "id", unique = true, nullable = false)
  public long id;

  @Column(name = "value", nullable = false)
  private boolean value;
}

public class AnotherEntity {
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  @Column(name = "id", unique = true, nullable = false)
  private Long id;

  @OneToOne(fetch = FetchType.EAGER)
  private Entity player;
}

public interface EntityRepository extends JpaRepository<Entity, Long>{
}

public interface AnotherEntityRepository extends JpaRepository<AnotherEntity, Long>{
}

@Test
public void равенствоИзмененногоЗначенияВоВнутреннейСущностиПослеСохраненияЕеИзвне() {
	EntityRepository entityRepository = context.getBean(EntityRepository.class);
	Entity entity = entityRepository.findOne(1L);;
	AnotherEntityRepository entityRepository = context.getBean(AnotherEntityRepository.class);
	AnotherEntity anotherEntity = entityRepository.findOne(1L);
	assertEquals(entity.getId(), entityRepository.getEntity.getId());
	assertEquals(entity.getValue(), false);
	assertEquals(entity.getValue(), entityRepository.getEntity.getValue());
	entity.setValue(false);
	entity.save();
	assertEquals(entity.getValue(), entityRepository.getEntity.getValue());    //assertionFail
}

public class AnotherEntity {
  ...
  @OneToOne(fetch = FetchType.EAGER)
  private Entity entity;
}

entity.setValue(true);
entity.save();
assertEquals(entity.getValue(), entityRepository.getEntity.getValue());    //assertionFail