energylink/public/app/core/specs/datemath.jest.ts

import sinon from "sinon";

import * as dateMath from "app/core/utils/datemath";
import moment from "moment";
import _ from "lodash";

describe("DateMath", () => {
  var spans = ["s", "m", "h", "d", "w", "M", "y"];
  var anchor = "2014-01-01T06:06:06.666Z";
  var unix = moment(anchor).valueOf();
  var format = "YYYY-MM-DDTHH:mm:ss.SSSZ";
  var clock;

  describe("errors", () => {
    it("should return undefined if passed something falsy", () => {
      expect(dateMath.parse(false)).toBe(undefined);
    });

    it("should return undefined if I pass an operator besides [+-/]", () => {
      expect(dateMath.parse("now&1d")).toBe(undefined);
    });

    it(
      "should return undefined if I pass a unit besides" + spans.toString(),
      () => {
        expect(dateMath.parse("now+5f")).toBe(undefined);
      }
    );

    it("should return undefined if rounding unit is not 1", () => {
      expect(dateMath.parse("now/2y")).toBe(undefined);
      expect(dateMath.parse("now/0.5y")).toBe(undefined);
    });

    it("should not go into an infinite loop when missing a unit", () => {
      expect(dateMath.parse("now-0")).toBe(undefined);
      expect(dateMath.parse("now-00")).toBe(undefined);
    });
  });

  it("now/d should set to start of current day", () => {
    var expected = new Date();
    expected.setHours(0);
    expected.setMinutes(0);
    expected.setSeconds(0);
    expected.setMilliseconds(0);

    var startOfDay = dateMath.parse("now/d", false).valueOf();
    expect(startOfDay).toBe(expected.getTime());
  });

  it("now/d on a utc dashboard should be start of the current day in UTC time", () => {
    var today = new Date();
    var expected = new Date(
      Date.UTC(
        today.getUTCFullYear(),
        today.getUTCMonth(),
        today.getUTCDate(),
        0,
        0,
        0,
        0
      )
    );

    var startOfDay = dateMath.parse("now/d", false, "utc").valueOf();
    expect(startOfDay).toBe(expected.getTime());
  });

  describe("subtraction", () => {
    var now;
    var anchored;

    beforeEach(() => {
      clock = sinon.useFakeTimers(unix);
      now = moment();
      anchored = moment(anchor);
    });

    _.each(spans, span => {
      var nowEx = "now-5" + span;
      var thenEx = anchor + "||-5" + span;

      it("should return 5" + span + " ago", () => {
        expect(dateMath.parse(nowEx).format(format)).toEqual(
          now.subtract(5, span).format(format)
        );
      });

      it("should return 5" + span + " before " + anchor, () => {
        expect(dateMath.parse(thenEx).format(format)).toEqual(
          anchored.subtract(5, span).format(format)
        );
      });
    });

    afterEach(() => {
      clock.restore();
    });
  });

  describe("rounding", () => {
    var now;

    beforeEach(() => {
      clock = sinon.useFakeTimers(unix);
      now = moment();
    });

    _.each(spans, span => {
      it("should round now to the beginning of the " + span, function() {
        expect(dateMath.parse("now/" + span).format(format)).toEqual(
          now.startOf(span).format(format)
        );
      });

      it("should round now to the end of the " + span, function() {
        expect(dateMath.parse("now/" + span, true).format(format)).toEqual(
          now.endOf(span).format(format)
        );
      });
    });

    afterEach(() => {
      clock.restore();
    });
  });

  describe("isValid", () => {
    it("should return false when invalid date text", () => {
      expect(dateMath.isValid("asd")).toBe(false);
    });
    it("should return true when valid date text", () => {
      expect(dateMath.isValid("now-1h")).toBe(true);
    });
  });

  describe("relative time to date parsing", function() {
    it("should handle negative time", function() {
      var date = dateMath.parseDateMath("-2d", moment([2014, 1, 5]));
      expect(date.valueOf()).toEqual(moment([2014, 1, 3]).valueOf());
    });

    it("should handle multiple math expressions", function() {
      var date = dateMath.parseDateMath("-2d-6h", moment([2014, 1, 5]));
      expect(date.valueOf()).toEqual(moment([2014, 1, 2, 18]).valueOf());
    });

    it("should return false when invalid expression", function() {
      var date = dateMath.parseDateMath("2", moment([2014, 1, 5]));
      expect(date).toEqual(undefined);
    });
  });
});