import React from "react";
import ReactDOM from "react-dom";
import DatePicker from "../src/index.jsx";
import assert from "assert";
import co from "co";
import ES6Promise from 'es6-promise';
import UUID from "node-uuid";
import TestUtils from 'react-dom/test-utils';
import createReactClass from 'create-react-class';

ES6Promise.polyfill();

const spanishDayLabels = ['Dom', 'Lu', 'Ma', 'Mx', 'Ju', 'Vi', 'Sab'];
const spanishMonthLabels = ['Enero', 'Febrero', 'Marzo', 'Abril', 'Mayo', 'Junio', 'Julio', 'Agosto', 'Septiembre', 'Octubre', 'Noviembre', 'Diciembre'];

const assertIsoStringsHaveSameDate = (IsoStringA, IsoStringB) => {
  const dateA = new Date(IsoStringA);
  const dateB = new Date(IsoStringB);
  assert.equal(dateA.getMonth(), dateB.getMonth());
  assert.equal(dateA.getDate(), dateB.getDate());
  assert.equal(dateA.getFullYear(), dateB.getFullYear());
}

describe("Date Picker", function() {
  this.timeout(30000);
  let container, calendarContainer;
  before(function(){
    container = document.createElement("div");
    container.id = "react";
    document.getElementsByTagName('body')[0].appendChild(container);
    calendarContainer = document.createElement("div"); // optional container for the calendar popover
    calendarContainer.id = "calendarContainer";
    document.getElementsByTagName('body')[0].appendChild(calendarContainer);
  });
  after(function(){
    document.getElementsByTagName('body')[0].removeChild(container);
    document.getElementsByTagName('body')[0].removeChild(calendarContainer);
  });
  it("should render an empty date picker.", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const hiddenInputElement = document.getElementById(id);
    assert.equal(hiddenInputElement.value, "");
    assert.equal(hiddenInputElement.getAttribute('data-formattedvalue'), "");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should render a date picker with a value.", co.wrap(function *(){
    const id = UUID.v4();
    const value = `${new Date().toISOString().slice(0,10)}T12:00:00.000Z`;
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} value={value} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const hiddenInputElement = document.getElementById(id);
    assertIsoStringsHaveSameDate(hiddenInputElement.value, value);
    assert.equal(hiddenInputElement.getAttribute('data-formattedvalue'), `${value.slice(5,7)}/${value.slice(8,10)}/${value.slice(0,4)}`);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should open the calendar and select a date.", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const hiddenInputElement = document.getElementById(id);
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const dayElement = document.querySelector("table tbody tr:nth-child(2) td");
    assert.equal(hiddenInputElement.value, '');
    assert.equal(hiddenInputElement.getAttribute('data-formattedvalue'), "");
    TestUtils.Simulate.click(dayElement);
    assert.notEqual(hiddenInputElement.value, '');
    assert.notEqual(hiddenInputElement.getAttribute('data-formattedvalue'), "");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should open the calendar, select a date, and trigger a change event.", co.wrap(function *(){
    const id = UUID.v4();
    let value = null;
    let formattedValue = null;
    const App = createReactClass({
      handleChange: function(newValue, newFormattedValue){
        value = newValue;
        formattedValue = newFormattedValue;
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const dayElement = document.querySelector("table tbody tr:nth-child(2) td");
    assert.equal(value, null);
    assert.equal(formattedValue, null);
    TestUtils.Simulate.click(dayElement);
    assert(typeof value === "string");
    assert(typeof formattedValue === "string");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should open the calendar and render 29 days on a leap year.", co.wrap(function *(){
    const id = UUID.v4();
    let value = "2016-02-15T00:00:00.000Z";
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} value={value} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const dayElement = document.querySelector("table tbody tr:nth-child(5) td:nth-of-type(2)");
    assert.equal(dayElement.innerHTML, '29');
    TestUtils.Simulate.click(dayElement);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should update via a change handler when the input is changed.", co.wrap(function *(){
    const id = UUID.v4();
    let value = null;
    let formattedValue = null;
    const App = createReactClass({
      handleChange: function(newValue, newFormattedValue){
        value = newValue;
        formattedValue = newFormattedValue;
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} dateFormat="MM/DD/YYYY" />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    inputElement.value = "05/31/1980";
    TestUtils.Simulate.change(inputElement);
    const date = new Date(value);
    assert.equal(date.getMonth(), 4);
    assert.equal(date.getDate(), 31);
    assert.equal(date.getFullYear(), 1980);
    assert.equal(formattedValue, "05/31/1980");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should render with custom elements", co.wrap(function *(){
    const id = UUID.v4();
    const clearButtonElement = <div id="clear-button-element"></div>;
    const previousButtonElement = <div id="previous-button-element"></div>;
    const nextButtonElement = <div id="next-button-element"></div>;
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker
            id={id}
            dayLabels={spanishDayLabels}
            monthLabels={spanishMonthLabels}
            clearButtonElement={clearButtonElement}
            nextButtonElement={nextButtonElement}
            previousButtonElement={previousButtonElement} />
        </div>;
      }
    });
    var spanishMonthLabel = spanishMonthLabels[new Date().getMonth()];
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const dayElement = document.querySelector("table tbody tr:nth-child(2) td");
    TestUtils.Simulate.click(dayElement);
    const popover = document.querySelector(".popover");
    assert.notEqual(document.getElementById("clear-button-element"), null);
    assert.notEqual(document.getElementById("previous-button-element"), null);
    assert.notEqual(document.getElementById("next-button-element"), null);
    assert.notEqual(popover.innerHTML.indexOf(spanishMonthLabel), -1);
    assert.notEqual("Mx", -1);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should render without clear button element", co.wrap(function *(){
    const id = UUID.v4();
    const clearButtonElement = <div id="clear-button-element"></div>;
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker
            id={id}
            clearButtonElement={clearButtonElement}
            showClearButton={false}
            />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    assert.equal(document.getElementById("clear-button-element"), null);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should go to the previous and next month.", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const hiddenInputElement = document.getElementById(id);
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const previousButtonElement = document.querySelector(".pull-left");
    const nextButtonElement = document.querySelector(".pull-right");
    const dayElement = document.querySelector("table tbody tr:nth-child(2) td");
    TestUtils.Simulate.click(previousButtonElement);
    TestUtils.Simulate.click(dayElement);
    var previousMonthISOString = hiddenInputElement.value;
    TestUtils.Simulate.focus(inputElement);
    TestUtils.Simulate.click(nextButtonElement);
    TestUtils.Simulate.click(dayElement);
    var currentMonthISOString = hiddenInputElement.value;
    assert(previousMonthISOString < currentMonthISOString);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should cycle through every month in the year.", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const nextButtonElement = document.querySelector(".pull-right");
    for(let i = 0; i < 12; i++) {
      TestUtils.Simulate.click(nextButtonElement);
    }
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should update via a change handler when cleared.", co.wrap(function *(){
    const id = UUID.v4();
    let value = null;
    let formattedValue = null;
    const App = createReactClass({
      handleChange: function(newValue, newFormattedValue){
        value = newValue;
        formattedValue = newFormattedValue;
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const clearButtonElement = document.querySelector("span.input-group-addon");
    const dayElement = document.querySelector("table tbody tr:nth-child(2) td");
    TestUtils.Simulate.click(dayElement);
    assert.notEqual(value, null);
    assert.notEqual(formattedValue, null);
    TestUtils.Simulate.click(clearButtonElement);
    assert.equal(value, null);
    assert.equal(formattedValue, null);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should call focus and blur handlers.", co.wrap(function *(){
    const id = UUID.v4();
    var results = {};
    var value = `${new Date().toISOString().slice(0,10)}T12:00:00.000Z`;
    const App = createReactClass({
      getInitialState: function() {
        return {
          focused: false
        }
      },
      focusHandler: function(e) {
        assert.equal(e.target, document.querySelector("input[type=hidden]"));
        assertIsoStringsHaveSameDate(e.target.value, value);
        this.setState({
          focused: true
        });
      },
      blurHandler: function(e) {
        assert.equal(e.target, document.querySelector("input[type=hidden]"));
        assertIsoStringsHaveSameDate(e.target.value, value);
        this.setState({
          focused: false
        });
      },
      render: function(){
        return <div>
          <div id='blurringClickTarget'>Blurring Click Target</div>
          {this.state.focused ? <div id="focused">Focused</div> : <div id="blurred">Blurred</div>}
          <DatePicker id={id} onBlur={this.blurHandler} onFocus={this.focusHandler} value={value} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    const blurringClickTarget = document.getElementById("blurringClickTarget");
    assert.notEqual(document.getElementById("blurred"), null);
    TestUtils.Simulate.focus(inputElement);
    assert.notEqual(document.getElementById("focused"), null);
    TestUtils.Simulate.blur(inputElement);
    blurringClickTarget.click(); // React-overlays won't hide on a synthetic event so can't use TestUtils here.
    assert.notEqual(document.getElementById("blurred"), null);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it('should trim extra characters.', co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    inputElement.value = "05/31/1980 extra";
    TestUtils.Simulate.change(inputElement);
    assert.equal(inputElement.value, "05/31/1980");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should automatically insert slashes.", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    inputElement.value = "0";
    TestUtils.Simulate.change(inputElement);
    inputElement.value = "053";
    TestUtils.Simulate.change(inputElement);
    assert.equal(inputElement.value, "05/3");
    inputElement.value = "05/311";
    TestUtils.Simulate.change(inputElement);
    assert.equal(inputElement.value, "05/31/1");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should automatically insert in YYYY/MM/DD format.", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} dateFormat="YYYY/MM/DD" />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    inputElement.value = "0";
    TestUtils.Simulate.change(inputElement);
    inputElement.value = "19800";
    TestUtils.Simulate.change(inputElement);
    assert.equal(inputElement.value, "1980/0");
    inputElement.value = "1980/053";
    TestUtils.Simulate.change(inputElement);
    assert.equal(inputElement.value, "1980/05/3");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should render dates in different formats.", co.wrap(function *(){
    const mm_dd_yyyy_id = "_" + UUID.v4();
    const dd_mm_yyyy_id = "_" + UUID.v4();
    const yyyy_mm_dd_id = "_" + UUID.v4();
    const values = {};
    const formattedValues = {};
    const getValues = {};
    const getFormattedValues = {};
    const App = createReactClass({
      getInitialState: function(){
        return {
          value: null
        }
      },
      handleChange(newValue, newFormattedValue, dateFormat){
        this.setState({value:newValue});
        values[dateFormat] = newValue;
        formattedValues[dateFormat] = newFormattedValue;
      },
      componentDidUpdate() {
        getValues["MM/DD/YYYY"] = this.refs["MM/DD/YYYY"].getValue();
        getFormattedValues["MM/DD/YYYY"] = this.refs["MM/DD/YYYY"].getFormattedValue();
        getValues["DD/MM/YYYY"] = this.refs["DD/MM/YYYY"].getValue();
        getFormattedValues["DD/MM/YYYY"] = this.refs["DD/MM/YYYY"].getFormattedValue();
        getValues["YYYY/MM/DD"] = this.refs["YYYY/MM/DD"].getValue();
        getFormattedValues["YYYY/MM/DD"] = this.refs["YYYY/MM/DD"].getFormattedValue();
      },
      render: function(){
        return <div>
          <DatePicker ref="MM/DD/YYYY" id={mm_dd_yyyy_id} dateFormat="MM/DD/YYYY" onChange={(newValue, newFormattedValue) => this.handleChange(newValue, newFormattedValue, "MM/DD/YYYY")} value={this.state.value} />
          <DatePicker ref="DD/MM/YYYY" id={dd_mm_yyyy_id} dateFormat="DD/MM/YYYY" onChange={(newValue, newFormattedValue) => this.handleChange(newValue, newFormattedValue, "DD/MM/YYYY")} value={this.state.value} />
          <DatePicker ref="YYYY/MM/DD" id={yyyy_mm_dd_id} dateFormat="YYYY/MM/DD" onChange={(newValue, newFormattedValue) => this.handleChange(newValue, newFormattedValue, "YYYY/MM/DD")} value={this.state.value} />
        </div>;
      }
    });
    const app = <App />;
    yield new Promise(function(resolve, reject){
      ReactDOM.render(app, container, resolve);
    });
    const mm_dd_yyyy_inputElement = document.querySelector("#" + mm_dd_yyyy_id + "_group input.form-control");
    const dd_mm_yyyy_inputElement = document.querySelector("#" + dd_mm_yyyy_id + "_group input.form-control");
    const yyyy_mm_dd_inputElement = document.querySelector("#" + yyyy_mm_dd_id + "_group input.form-control");
    let date;
    mm_dd_yyyy_inputElement.value = "05/31/1980";
    TestUtils.Simulate.change(mm_dd_yyyy_inputElement);
    TestUtils.Simulate.change(dd_mm_yyyy_inputElement);
    TestUtils.Simulate.change(yyyy_mm_dd_inputElement);
    assert.equal(mm_dd_yyyy_inputElement.value, "05/31/1980");
    assert.equal(dd_mm_yyyy_inputElement.value, "31/05/1980");
    assert.equal(yyyy_mm_dd_inputElement.value, "1980/05/31");
    assertIsoStringsHaveSameDate("1980-05-31T12:00:00.000Z", values["MM/DD/YYYY"]);
    assertIsoStringsHaveSameDate("1980-05-31T12:00:00.000Z", values["DD/MM/YYYY"]);
    assertIsoStringsHaveSameDate("1980-05-31T12:00:00.000Z", values["YYYY/MM/DD"]);
    assertIsoStringsHaveSameDate("1980-05-31T12:00:00.000Z", getValues["MM/DD/YYYY"]);
    assertIsoStringsHaveSameDate("1980-05-31T12:00:00.000Z", getValues["DD/MM/YYYY"]);
    assertIsoStringsHaveSameDate("1980-05-31T12:00:00.000Z", getValues["YYYY/MM/DD"]);
    assert.equal(formattedValues["MM/DD/YYYY"], "05/31/1980");
    assert.equal(formattedValues["DD/MM/YYYY"], "31/05/1980");
    assert.equal(formattedValues["YYYY/MM/DD"], "1980/05/31");
    assert.equal(getFormattedValues["MM/DD/YYYY"], "05/31/1980");
    assert.equal(getFormattedValues["DD/MM/YYYY"], "31/05/1980");
    assert.equal(getFormattedValues["YYYY/MM/DD"], "1980/05/31");
    dd_mm_yyyy_inputElement.value = "15/04/2015";
    TestUtils.Simulate.change(dd_mm_yyyy_inputElement);
    TestUtils.Simulate.change(mm_dd_yyyy_inputElement);
    TestUtils.Simulate.change(yyyy_mm_dd_inputElement);
    assert.equal(mm_dd_yyyy_inputElement.value, "04/15/2015");
    assert.equal(dd_mm_yyyy_inputElement.value, "15/04/2015");
    assert.equal(yyyy_mm_dd_inputElement.value, "2015/04/15");
    assertIsoStringsHaveSameDate("2015-04-15T12:00:00.000Z", values["MM/DD/YYYY"]);
    assertIsoStringsHaveSameDate("2015-04-15T12:00:00.000Z", values["DD/MM/YYYY"]);
    assertIsoStringsHaveSameDate("2015-04-15T12:00:00.000Z", values["YYYY/MM/DD"]);
    assertIsoStringsHaveSameDate("2015-04-15T12:00:00.000Z", getValues["MM/DD/YYYY"]);
    assertIsoStringsHaveSameDate("2015-04-15T12:00:00.000Z", getValues["DD/MM/YYYY"]);
    assertIsoStringsHaveSameDate("2015-04-15T12:00:00.000Z", getValues["YYYY/MM/DD"]);
    assert.equal(formattedValues["MM/DD/YYYY"], "04/15/2015");
    assert.equal(formattedValues["DD/MM/YYYY"], "15/04/2015");
    assert.equal(formattedValues["YYYY/MM/DD"], "2015/04/15");
    assert.equal(getFormattedValues["MM/DD/YYYY"], "04/15/2015");
    assert.equal(getFormattedValues["DD/MM/YYYY"], "15/04/2015");
    assert.equal(getFormattedValues["YYYY/MM/DD"], "2015/04/15");
    yyyy_mm_dd_inputElement.value = "1999/12/31";
    TestUtils.Simulate.change(yyyy_mm_dd_inputElement);
    TestUtils.Simulate.change(mm_dd_yyyy_inputElement);
    TestUtils.Simulate.change(dd_mm_yyyy_inputElement);
    assert.equal(mm_dd_yyyy_inputElement.value, "12/31/1999");
    assert.equal(dd_mm_yyyy_inputElement.value, "31/12/1999");
    assert.equal(yyyy_mm_dd_inputElement.value, "1999/12/31");
    assertIsoStringsHaveSameDate("1999-12-31T12:00:00.000Z", values["MM/DD/YYYY"]);
    assertIsoStringsHaveSameDate("1999-12-31T12:00:00.000Z", values["DD/MM/YYYY"]);
    assertIsoStringsHaveSameDate("1999-12-31T12:00:00.000Z", values["YYYY/MM/DD"]);
    assertIsoStringsHaveSameDate("1999-12-31T12:00:00.000Z", getValues["MM/DD/YYYY"]);
    assertIsoStringsHaveSameDate("1999-12-31T12:00:00.000Z", getValues["DD/MM/YYYY"]);
    assertIsoStringsHaveSameDate("1999-12-31T12:00:00.000Z", getValues["YYYY/MM/DD"]);
    assert.equal(formattedValues["MM/DD/YYYY"], "12/31/1999");
    assert.equal(formattedValues["DD/MM/YYYY"], "31/12/1999");
    assert.equal(formattedValues["YYYY/MM/DD"], "1999/12/31");
    assert.equal(getFormattedValues["MM/DD/YYYY"], "12/31/1999");
    assert.equal(getFormattedValues["DD/MM/YYYY"], "31/12/1999");
    assert.equal(getFormattedValues["YYYY/MM/DD"], "1999/12/31");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("week should start on Monday.", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} weekStartsOn={1} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    assert.equal(document.querySelector("table thead tr:first-child td small").innerHTML, "Mon");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should allow placing the popover calendar in a container specified in the props.", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} calendarContainer={calendarContainer} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    assert.notEqual(document.querySelector("#calendarContainer .date-picker-popover"), null);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should have no focus with autoFocus false.", co.wrap(function *(){
    const id = UUID.v4();
    const value = new Date().toISOString();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} value={value} autoFocus={false}/>
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    assert.notEqual(inputElement, document.activeElement);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should have focus with autoFocus true.", co.wrap(function *(){
    const id = UUID.v4();
    const value = new Date().toISOString();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} value={value} autoFocus={true}/>
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    assert.equal(inputElement, document.activeElement);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should disable the input.", co.wrap(function *(){
    const id = UUID.v4();
    const value = new Date().toISOString();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} value={value} disabled={true}/>
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const hiddenInputElement = document.getElementById(id);
    const inputElement = document.querySelector("input.form-control");
    assert.equal(inputElement.disabled, true);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should disable the input.", co.wrap(function *(){
    const id = UUID.v4();
    let value = new Date().toISOString();
    let originalValue = value;
    const App = createReactClass({
      handleChange: function(newValue){
        value = newValue;
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} disabled={true} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    assert.equal(inputElement.disabled, true);
    const clearButtonElement = document.querySelector("span.input-group-addon");
    TestUtils.Simulate.click(clearButtonElement);
    assertIsoStringsHaveSameDate(value, originalValue);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should display the correct day of the week in the calendar.", co.wrap(function *(){
    const id = UUID.v4();
    let value = null;
    let formattedValue = null;
    const App = createReactClass({
      handleChange: function(newValue, newFormattedValue){
        value = newValue;
        formattedValue = newFormattedValue;
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} dateFormat="MM/DD/YYYY" />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    const hiddenInputElement = document.getElementById(id);
    const checkMonthAndYear = function(startValue) {
      inputElement.value = `${startValue.slice(5,7)}/${startValue.slice(8,10)}/${startValue.slice(0,4)}`;
      TestUtils.Simulate.change(inputElement);
      TestUtils.Simulate.focus(inputElement);
      const weekElements = document.querySelectorAll("table tbody tr");
      for(let i = 0; i < weekElements.length; i++) {
        const dayElements = weekElements[i].querySelectorAll("td");
        for(let j = 0; j < dayElements.length; j++) {
          const dayElement = dayElements[j];
          if(dayElement.innerHTML === '') {
            return;
          }
          TestUtils.Simulate.click(dayElement);
          let date = new Date(hiddenInputElement.value);
          assert.equal(date.getDay(), j);
        }
      }
    }
    const today = new Date();
    for(let year = today.getFullYear() - 2; year < today.getFullYear() + 2; year++) {
      for(let month = 0; month < 12; month++) {
        const date = new Date();
        date.setMonth(month);
        date.setYear(year);
        checkMonthAndYear(date.toISOString());
      }
    }
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should display the correct day of the week in the calendar when starting on Monday.", co.wrap(function *(){
    const id = UUID.v4();
    let value = null;
    let formattedValue = null;
    const App = createReactClass({
      handleChange: function(newValue, newFormattedValue){
        value = newValue;
        formattedValue = newFormattedValue;
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} dateFormat="MM/DD/YYYY" weekStartsOn={1} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    const hiddenInputElement = document.getElementById(id);
    const checkMonthAndYear = function(startValue) {
      inputElement.value = `${startValue.slice(5,7)}/${startValue.slice(8,10)}/${startValue.slice(0,4)}`;
      TestUtils.Simulate.change(inputElement);
      TestUtils.Simulate.focus(inputElement);
      const weekElements = document.querySelectorAll("table tbody tr");
      for(let i = 0; i < weekElements.length; i++) {
        const dayElements = weekElements[i].querySelectorAll("td");
        for(let j = 0; j < dayElements.length; j++) {
          const dayElement = dayElements[j];
          if(dayElement.innerHTML === '') {
            return;
          }
          TestUtils.Simulate.click(dayElement);
          let date = new Date(hiddenInputElement.value);
          assert.equal(date.getDay(), j === 6 ? 0 : j + 1);
        }
      }
    }
    const today = new Date();
    for(let year = today.getFullYear() - 2; year < today.getFullYear() + 2; year++) {
      for(let month = 0; month < 12; month++) {
        const date = new Date();
        date.setMonth(month);
        date.setYear(year);
        checkMonthAndYear(date.toISOString());
      }
    }
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should set a default value", co.wrap(function *(){
    const id = UUID.v4();
    const defaultValue = `${new Date().toISOString().slice(0,10)}T12:00:00.000Z`;
    let value = null;
    let formattedValue = null;
    const App = createReactClass({
      handleChange: function(newValue, newFormattedValue){
        value = newValue;
        formattedValue = newFormattedValue;
      },
      render: function(){
        return <div>
          <DatePicker defaultValue={defaultValue} id={id} onChange={this.handleChange} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const hiddenInputElement = document.getElementById(id);
    assertIsoStringsHaveSameDate(hiddenInputElement.value, defaultValue);
    assert.equal(value, null);
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.change(inputElement);
    assert.notEqual(value, null);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should error if value and default value are both set.", co.wrap(function *(){
    const value = new Date().toISOString();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker value={value} defaultValue={value} />
        </div>;
      }
    });
    try {
      yield new Promise(function(resolve, reject){
        ReactDOM.render(<App />, container, resolve);
      });
      throw new Error("Value and default value should not be set simultaneously");
    } catch (e) {
      assert(e.message.indexOf("Conflicting") !== -1)
    }
    ReactDOM.unmountComponentAtNode(container);
  }));
  it('should render with today button element', co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker
            id={id}
            showTodayButton={true}
            todayButtonLabel="Today is the day"
            />
        </div>;
      }
    });
    yield new Promise(function(resolve){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector('input.form-control');
    TestUtils.Simulate.focus(inputElement);
    const todayElement = document.querySelector('.u-today-button');
    assert.equal(todayElement.innerText, 'Today is the day');
    ReactDOM.unmountComponentAtNode(container);
  }));
  it('should render a custom button element', co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker
            id={id}
            customControl={<button id="test-btn">Test button</button>} />
        </div>;
      }
    });
    yield new Promise(function(resolve){
      ReactDOM.render(<App />, container, resolve);
    });
    const customElement = document.getElementById('test-btn');
    assert.notEqual(customElement, null);
    assert.equal(customElement.innerText, 'Test button');
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should set the FormControl className.", co.wrap(function *(){
    const id = UUID.v4();
    const className = `_${UUID.v4()}`;
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} className={className} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector(`input.${className}`);
    assert.notEqual(inputElement, null);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should set the FormControl style.", co.wrap(function *(){
    const backgroundColor = `rgb(${Math.round(Math.random() * 255, 0)}, ${Math.round(Math.random() * 255, 0)}, ${Math.round(Math.random() * 255, 0)})`;
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker style={{backgroundColor: backgroundColor}}/>
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector('input.form-control');
    assert.equal(inputElement.style.backgroundColor, backgroundColor);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should disable dates outside of min and max dates.", co.wrap(function *(){
    const id = UUID.v4();
    const originalValue = "2016-09-15T12:00:00.000Z"
    const minDate = "2016-09-11T00:00:00.000Z";
    const maxDate = "2016-09-17T00:00:00.000Z";
    const justRightValue = "2016-09-11T12:00:00.000Z"
    const App = createReactClass({
      getInitialState: function(){
        return {
          value: originalValue
        }
      },
      handleChange(value){
        this.setState({value:value});
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} minDate={minDate} maxDate={maxDate} value={this.state.value} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const hiddenInputElement = document.getElementById(id);
    const tooEarly = document.querySelector("table tbody tr:nth-child(2) td");
    const justRight = document.querySelector("table tbody tr:nth-child(3) td");
    const tooLate = document.querySelector("table tbody tr:nth-child(4) td");
    assert.equal(hiddenInputElement.value, originalValue);
    TestUtils.Simulate.click(tooEarly);
    assert.equal(hiddenInputElement.value, originalValue);
    TestUtils.Simulate.click(justRight);
    assert.equal(hiddenInputElement.value, justRightValue);
    TestUtils.Simulate.click(tooLate);
    assert.equal(hiddenInputElement.value, justRightValue);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should show next and prev buttons if min and max dates are not set.", co.wrap(function *(){
    const id = UUID.v4();
    const displayDate = "2017-07-21T12:00:00.000Z"
    const App = createReactClass({
      getInitialState: function(){
        return {
          value: displayDate
        }
      },
      handleChange(value){
        this.setState({value:value});
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} value={this.state.value} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const prevButton = document.querySelector(".datepicker-previous-wrapper");
    const nextButton = document.querySelector(".datepicker-next-wrapper");
    assert.equal(prevButton.innerHTML, '&lt;');
    assert.equal(nextButton.innerHTML, '&gt;');
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should show next and prev buttons if min and max dates are set but not displayed.", co.wrap(function *(){
    const id = UUID.v4();
    const displayDate = "2017-07-21T12:00:00.000Z"
    const minDate = "2017-01-01T12:00:00.000Z";
    const maxDate = "2017-12-31T12:00:00.000Z";
    const App = createReactClass({
      getInitialState: function(){
        return {
          value: displayDate
        }
      },
      handleChange(value){
        this.setState({value:value});
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} minDate={minDate} maxDate={maxDate} value={this.state.value} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const prevButton = document.querySelector(".datepicker-previous-wrapper");
    const nextButton = document.querySelector(".datepicker-next-wrapper");
    assert.equal(prevButton.innerHTML, '&lt;');
    assert.equal(nextButton.innerHTML, '&gt;');
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should hide previousButtonElement if min date is set and being displayed.", co.wrap(function *(){
    const id = UUID.v4();
    const displayDate = "2017-01-15T12:00:00.000Z"
    const minDate = "2017-01-01T12:00:00.000Z";
    const maxDate = "2017-12-31T12:00:00.000Z";
    const App = createReactClass({
      getInitialState: function(){
        return {
          value: displayDate
        }
      },
      handleChange(value){
        this.setState({value:value});
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} minDate={minDate} maxDate={maxDate} value={this.state.value} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const prevButton = document.querySelector(".datepicker-previous-wrapper");
    const nextButton = document.querySelector(".datepicker-next-wrapper");
    assert.equal(prevButton.innerHTML, '');
    assert.equal(nextButton.innerHTML, '&gt;');
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should hide nextButtonElement if max date is set and being displayed.", co.wrap(function *(){
    const id = UUID.v4();
    const displayDate = "2017-12-15T12:00:00.000Z"
    const minDate = "2017-01-01T12:00:00.000Z";
    const maxDate = "2017-12-31T12:00:00.000Z";
    const App = createReactClass({
      getInitialState: function(){
        return {
          value: displayDate
        }
      },
      handleChange(value){
        this.setState({value:value});
      },
      render: function(){
        return <div>
          <DatePicker id={id} onChange={this.handleChange} minDate={minDate} maxDate={maxDate} value={this.state.value} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const prevButton = document.querySelector(".datepicker-previous-wrapper");
    const nextButton = document.querySelector(".datepicker-next-wrapper");
    assert.equal(prevButton.innerHTML, '&lt;');
    assert.equal(nextButton.innerHTML, '');
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should allow for rounded corners.", co.wrap(function *(){
    const withoutRoundedCorners = "_" + UUID.v4();
    const withRoundedCorners = "_" + UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={withoutRoundedCorners} />
          <DatePicker id={withRoundedCorners} roundedCorners />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const withoutRoundedCorners_inputElement = document.querySelector("#" + withoutRoundedCorners + "_group input.form-control");
    const withRoundedCorners_inputElement = document.querySelector("#" + withRoundedCorners + "_group input.form-control");
    TestUtils.Simulate.focus(withoutRoundedCorners_inputElement);
    const withoutRoundedCornersDayElement = document.querySelector("#" + withoutRoundedCorners + "_group table tbody tr:nth-child(2) td");
    TestUtils.Simulate.click(withoutRoundedCornersDayElement);
    assert.equal(withoutRoundedCornersDayElement.style.borderRadius, '0px');
    TestUtils.Simulate.focus(withRoundedCorners_inputElement);
    const withRoundedCornersDayElement = document.querySelector("#" + withRoundedCorners + "_group table tbody tr:nth-child(2) td");
    TestUtils.Simulate.click(withRoundedCornersDayElement);
    assert.equal(withRoundedCornersDayElement.style.borderRadius, '5px');
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("week should start on Thursday.", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} weekStartsOn={4} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    assert.equal(document.querySelector("table thead tr:first-child td small").innerHTML, "Thu");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("week should start on Saturday.", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} weekStartsOn={6} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    assert.equal(document.querySelector("table thead tr:first-child td small").innerHTML, "Sat");
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should allow for a string to determine calendar placement", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      render: function(){
        return <div>
          <DatePicker id={id} calendarPlacement="right" />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const popover = document.querySelector(".date-picker-popover.right");
    assert.notEqual(popover, null);
    ReactDOM.unmountComponentAtNode(container);
  }));
  it("should allow for a function to determine calendar placement", co.wrap(function *(){
    const id = UUID.v4();
    const App = createReactClass({
      handlePlacement(){
        return "top";
      },
      render: function(){
        return <div>
          <DatePicker id={id} calendarPlacement={this.handlePlacement} />
        </div>;
      }
    });
    yield new Promise(function(resolve, reject){
      ReactDOM.render(<App />, container, resolve);
    });
    const inputElement = document.querySelector("input.form-control");
    TestUtils.Simulate.focus(inputElement);
    const popover = document.querySelector(".date-picker-popover.top");
    assert.notEqual(popover, null);
    ReactDOM.unmountComponentAtNode(container);
  }));
});