@Test
public void getFirmwareVersionsShouldCallExecutor() throws ProtocolAdapterException {

    // Arrange
    // Nothing to do
    // Act
    this.firmwareService.getFirmwareVersions(this.dlmsConnectionManagerMock, this.dlmsDeviceMock);
    // Assert
    verify(this.getFirmwareVersionsCommandExecutor, times(1)).execute(this.dlmsConnectionManagerMock,
            this.dlmsDeviceMock, null);
}