### Question:
GetConfigurationObjectServiceDsmr4 extends GetConfigurationObjectService { @Override public boolean handles(final Protocol protocol) { return protocol == Protocol.DSMR_4_2_2; } GetConfigurationObjectServiceDsmr4(final DlmsHelper dlmsHelper); @Override boolean handles(final Protocol protocol);  }### Answer:
@Test public void handles() { assertThat(this.instance.handles(Protocol.SMR_5_0_0)).isFalse(); assertThat(this.instance.handles(Protocol.SMR_5_1)).isFalse(); assertThat(this.instance.handles(Protocol.DSMR_4_2_2)).isTrue(); assertThat(this.instance.handles(Protocol.OTHER_PROTOCOL)).isFalse(); assertThat(this.instance.handles(null)).isFalse(); }