@Test
public void getFlagsNullConfigurationFlags() throws Exception {

    // SETUP
    when(this.configurationToSet.getConfigurationFlags()).thenReturn(null);
    when(this.configurationOnDevice.getConfigurationFlags()).thenReturn(null);
    // CALL
    this.instance.getFlags(this.configurationToSet, this.configurationOnDevice);
    // VERIFY
    // no exception occurs
}