How to use the rc-util.KeyCode function in rc-util

/* eslint-disable react/no-multi-comp */
const keyCode = require('rc-util').KeyCode;
const expect = require('expect.js');
const InputNum = require('../index');
const React = require('react');
const TestUtils = require('react-addons-test-utils');
const ReactDOM = require('react-dom');
const Simulate = TestUtils.Simulate;
require('../assets/index.less');

const defaultValue = 98;

describe('inputNumber', () => {
  const container = document.createElement('div');
  document.body.appendChild(container);

  const Component = React.createClass({
    getInitialState() {

onKeyDown: function onKeyDown(event) {
    if (event.target.nodeName.toLowerCase() === 'input') {
      return undefined;
    }
    var keyCode = event.keyCode;
    // mac
    var ctrlKey = event.ctrlKey || event.metaKey;
    switch (keyCode) {
      case _rcUtil.KeyCode.DOWN:
        goWeek.call(this, 1);
        event.preventDefault();
        return 1;
      case _rcUtil.KeyCode.UP:
        goWeek.call(this, -1);
        event.preventDefault();
        return 1;
      case _rcUtil.KeyCode.LEFT:
        if (ctrlKey) {
          this.previousYear();
        } else {
          goDay.call(this, -1);
        }
        event.preventDefault();
        return 1;
      case _rcUtil.KeyCode.RIGHT:

var React = require('react');
var DateTimeFormat = require('gregorian-calendar-format');
var GregorianCalendar = require('gregorian-calendar');
var rcUtil = require('rc-util');
var KeyCode = rcUtil.KeyCode;
var staticPrefixClsFn = require('./util/prefixClsFn');

function noop() {
}

function goStartMonth() {
  var next = this.state.value.clone();
  next.setDayOfMonth(1);
  this.setState({value: next});
}

function goEndMonth() {
  var next = this.state.value.clone();
  next.setDayOfMonth(next.getActualMaximum(GregorianCalendar.MONTH));
  this.setState({value: next});
}

onKeyDown: function onKeyDown(event) {
    var props = this.props;
    if (props.disabled) {
      return;
    }
    var keyCode = event.keyCode;
    if (this.state.open && !this.getInputDOMNode()) {
      this.onInputKeyDown(event);
    } else if (keyCode === _rcUtil.KeyCode.ENTER || keyCode === _rcUtil.KeyCode.DOWN) {
      this.setOpenState(true);
      event.preventDefault();
    }
  },

onKeyDown: function onKeyDown(event) {
    var keyCode = event.keyCode;
    var ctrlKey = event.ctrlKey || event.metaKey;
    var stateValue = this.state.value;
    var value = stateValue;
    switch (keyCode) {
      case _rcUtil.KeyCode.DOWN:
        value = stateValue.clone();
        value.addMonth(3);
        break;
      case _rcUtil.KeyCode.UP:
        value = stateValue.clone();
        value.addMonth(-3);
        break;
      case _rcUtil.KeyCode.LEFT:
        value = stateValue.clone();
        if (ctrlKey) {
          value.addYear(-1);
        } else {
          value.addMonth(-1);
        }
        break;
      case _rcUtil.KeyCode.RIGHT:
        value = stateValue.clone();
        if (ctrlKey) {
          value.addYear(1);
        } else {

onCalendarKeyDown: function onCalendarKeyDown(event) {
    if (event.keyCode === _rcUtil.KeyCode.ESC) {
      event.stopPropagation();
      this.close(this.focus);
    }
  },
  onCalendarSelect: function onCalendarSelect(value) {

var React = require('react');
var DateTimeFormat = require('gregorian-calendar-format');
var rcUtil = require('rc-util');
var KeyCode = rcUtil.KeyCode;
var domAlign = require('dom-align');
var orientMap = {
  tl: ['top', 'left'],
  tr: ['top', 'right'],
  bl: ['bottom', 'left'],
  br: ['bottom', 'right']
};
var createChainedFunction = rcUtil.createChainedFunction;

function getImmutableOrient(orient) {
  if (orient) {
    for (var i in orientMap) {
      var original = orientMap[i];
      if (original[0] === orient[0] && original[1] === orient[1]) {
        return original;
      }

onInputKeyDown: function onInputKeyDown(event) {
    var props = this.props;
    if (props.disabled) {
      return;
    }
    var state = this.state;
    var keyCode = event.keyCode;
    if ((0, _util.isMultipleOrTags)(props) && !event.target.value && keyCode === _rcUtil.KeyCode.BACKSPACE) {
      var value = state.value.concat();
      if (value.length) {
        var label = state.label.concat();
        var popValue = value.pop();
        label.pop();
        props.onDeselect(popValue);
        this.fireChange(value, label);
      }
      return;
    }
    if (keyCode === _rcUtil.KeyCode.DOWN) {
      if (!state.open) {
        this.openIfHasChildren();
        event.preventDefault();
        event.stopPropagation();
        return;