it("#pollPacketTimes calls #_coreTimeCmd with params", function() {
      core.pollPacketTimes(0xFF, callback);
      expect(core.command).to.be.calledOnce;
      expect(core.command)
        .to.be.calledWith(0x00, 0x51, [0x00, 0x00, 0x00, 0xFF], callback);