18F/web-design-standards

const fs = require("fs");
const path = require("path");
const assert = require("assert");
const DatePicker = require("../index");
const EVENTS = require("./events");

const TEMPLATE = fs.readFileSync(
  path.join(__dirname, "/date-picker.template.html")
);

const datePickerSelector = () => document.querySelector(".usa-date-picker");
const tests = [
  { name: "document.body", selector: () => document.body },
  { name: "date picker", selector: datePickerSelector },
];

tests.forEach(({ name, selector: containerSelector }) => {
  describe(`date picker component month selection initialized at ${name}`, () => {
    const { body } = document;

    let root;
    let input;
    let button;

    const getCalendarEl = (query) =>
      root.querySelector(
        `.usa-date-picker__calendar${query ? ` ${query}` : ""}`
      );

    beforeEach(() => {
      body.innerHTML = TEMPLATE;
      DatePicker.on(containerSelector());
      root = datePickerSelector();
      input = root.querySelector(".usa-date-picker__external-input");
      button = root.querySelector(".usa-date-picker__button");
    });

    beforeEach("Open month selection view", () => {
      input.value = "6/20/2020";
      EVENTS.click(button);
      EVENTS.click(
        getCalendarEl(".usa-date-picker__calendar__month-selection")
      );
    });

    afterEach(() => {
      DatePicker.off(containerSelector());
      body.textContent = "";
    });

    it("should show month of June as focused", () => {
      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--focused").dataset
          .label,
        "June",
        "focuses correct month"
      );
    });

    it("should show month of June as selected", () => {
      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--selected").dataset
          .label,
        "June",
        "selects correct month"
      );
    });

    it("should navigate back three months when pressing up", () => {
      EVENTS.keydownArrowUp();

      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--focused").dataset
          .label,
        "March",
        "focuses correct month"
      );
    });

    it("should navigate ahead three months when pressing down", () => {
      EVENTS.keydownArrowDown();

      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--focused").dataset
          .label,
        "September",
        "focuses correct month"
      );
    });

    it("should navigate back one month when pressing left", () => {
      EVENTS.keydownArrowLeft();

      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--focused").dataset
          .label,
        "May",
        "focuses correct month"
      );
    });

    it("should navigate ahead one month when pressing right", () => {
      EVENTS.keydownArrowRight();

      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--focused").dataset
          .label,
        "July",
        "focuses correct month"
      );
    });

    it("should navigate to the beginning of the month row when pressing home", () => {
      EVENTS.keydownHome();

      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--focused").dataset
          .label,
        "April",
        "focuses correct month"
      );
    });

    it("should navigate to the end of the month row when pressing end", () => {
      EVENTS.keydownEnd();

      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--focused").dataset
          .label,
        "June",
        "focuses correct month"
      );
    });

    it("should navigate to January when pressing page up", () => {
      EVENTS.keydownPageUp();

      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--focused").dataset
          .label,
        "January",
        "focuses correct month"
      );
    });

    it("should navigate to December when pressing page down", () => {
      EVENTS.keydownPageDown();

      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--focused").dataset
          .label,
        "December",
        "focuses correct month"
      );
    });

    it("should update the focus when moving over a non-selected valid month", () => {
      EVENTS.mouseover(
        getCalendarEl().querySelector(
          '.usa-date-picker__calendar__month[data-label="October"]'
        )
      );

      assert.strictEqual(
        getCalendarEl(".usa-date-picker__calendar__month--focused").dataset
          .label,
        "October",
        "focuses correct month"
      );
    });
  });
});