fix(ui5-daterange-picker): fix firstDate/lastDate getters values (#2277)

Fix the return values of first and last date  public getters, previously returning wrong values.

Fixes #2221

Author: tsanislavgatev

packages/main/src/DateRangePicker.js

@@ -197,7 +197,6 @@ class DateRangePicker extends DatePicker {
 		this._firstDateTimestamp = Date.UTC(firstDate.getFullYear(), firstDate.getMonth(), firstDate.getDate(), firstDate.getHours()) / 1000;
 		this._lastDateTimestamp = Date.UTC(secondDate.getFullYear(), secondDate.getMonth(), secondDate.getDate(), secondDate.getHours()) / 1000;
 
-
 		if (this._firstDateTimestamp > this._lastDateTimestamp) {
 			const temp = this._firstDateTimestamp;
 			this._firstDateTimestamp = this._lastDateTimestamp;
@@ -257,7 +256,7 @@ class DateRangePicker extends DatePicker {
 	 */
 	get firstDateValue() {
 		const dateValue = new Date(this._firstDateTimestamp * 1000);
-		return new Date(Date.UTC(dateValue.getFullYear(), dateValue.getMonth(), dateValue.getDate()));
+		return new Date(dateValue.getUTCFullYear(), dateValue.getUTCMonth(), dateValue.getUTCDate(), dateValue.getUTCHours());
 	}
 
 	/**
@@ -269,7 +268,7 @@ class DateRangePicker extends DatePicker {
 	 */
 	get lastDateValue() {
 		const dateValue = new Date(this._lastDateTimestamp * 1000);
-		return new Date(Date.UTC(dateValue.getFullYear(), dateValue.getMonth(), dateValue.getDate()));
+		return new Date(dateValue.getUTCFullYear(), dateValue.getUTCMonth(), dateValue.getUTCDate(), dateValue.getUTCHours());
 	}
 
 	get _placeholder() {

packages/main/src/DayPicker.js

@@ -255,6 +255,7 @@ class DayPicker extends UI5Element {
 			lastWeekNumber = -1,
 			isDaySelected = false,
 			todayIndex = 0;
+
 		const _aVisibleDays = this._getVisibleDays(this._calendarDate);
 		this._weeks = [];
 		let week = [];

packages/main/test/specs/DateRangePicker.spec.js

@@ -43,7 +43,7 @@ describe("DateRangePicker general interaction", () => {
 
 		daterangepicker.click();
 		daterangepicker.keys("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
-		daterangepicker.keys("09/09/2019 - 10/10/2019");
+		daterangepicker.keys("27/09/2019 - 10/10/2019");
 		daterangepicker.keys("Enter");
 
 		const res = browser.execute(() => {
@@ -54,8 +54,8 @@ describe("DateRangePicker general interaction", () => {
 			return {firstDateValue, lastDateValue};
 		});
 
-		assert.strictEqual(res.firstDateValue, "2019-09-09T00:00:00.000Z", "The first date is in JS Date format");
-		assert.strictEqual(res.lastDateValue, "2019-10-10T00:00:00.000Z", "The last date is JS Date format");
+		assert.deepEqual(new Date(res.firstDateValue), new Date(2019, 8, 27), "The first date is in JS Date format");
+		assert.deepEqual(new Date(res.lastDateValue), new Date(2019, 9, 10), "The last date is JS Date format");
 	});
 
 	it("Initially setting the same date as first & last is possible", () => {