fix(ui5-date-picker): ensure min and max date are not disabled (#2280)

Ensure the Min and Max dates are included in the interval of selectable days.
In addition, correct component sample.

Author: tsanislavgatev

packages/main/src/DayPicker.js

@@ -807,8 +807,14 @@ class DayPicker extends UI5Element {
 
 	_isOutOfSelectableRange(date) {
 		const currentDate = date._oUDate ? date.toLocalJSDate() : CalendarDate.fromTimestamp(date).toLocalJSDate();
+		const minDate = this._minDateObject;
+		const maxDate = this._maxDateObject;
 
-		return currentDate > this._maxDateObject || currentDate < this._minDateObject;
+		currentDate.setHours(0);
+		minDate.setHours(0);
+		maxDate.setHours(0);
+
+		return currentDate > maxDate || currentDate < minDate;
 	}
 
 	get _maxDate() {

packages/main/test/pages/DatePicker.html

@@ -110,7 +110,7 @@ <h3>2 months range</h3>
 		<h3>3 months range</h3>
 		<ui5-date-picker id="minMax3" value="5/6/2020" min-date="6/1/2020" max-date="5/1/2021" format-pattern="dd/MM/yyyy"></ui5-date-picker>
 		<h3>1 year range</h3>
-		<ui5-date-picker id="minMax4" value="5 Feb 2021" min-date="5 Jan 2020" max-date="5 Jan 2021"></ui5-date-picker>
+		<ui5-date-picker id="minMax4" value="Feb 5, 2020" min-date="Jan 5, 2020" max-date="Jan 5, 2021"></ui5-date-picker>
 
 		<section>
 			<h3>Test ariaLabel and ariaLabelledBy</h3>

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

@@ -726,6 +726,16 @@ describe("Date Picker Tests", () => {
 		assert.ok(datepicker.getDisplayedDay(14).isFocusedDeep(), "Days out of range are disabled");
 	});
 
+	it("Min and Max date are included in the interval", () => {
+		datepicker.id = "#dp33";
+
+		datepicker.root.keys("Escape");
+		datepicker.openPicker({ focusInput: false });
+
+		assert.equal(datepicker.getDisplayedDay(9).hasClass("ui5-dp-item--disabled"), false , "Min date is included");
+		assert.equal(datepicker.getDisplayedDay(11).hasClass("ui5-dp-item--disabled"), false, "Max date is included");
+	});
+
 	it("Tests week numbers column visibility", () => {
 		// act
 		datepicker.id = "#dp18";