fix(calendar): Fixes related to date and calendar init in test.

Author: skrustev

projects/igniteui-angular/src/lib/calendar/calendar.component.spec.ts

@@ -2930,7 +2930,7 @@ describe("IgxCalendar - ", () => {
             it("Should prioritize weekStart property over locale.", fakeAsync(() => {
                 calendar.locale = "en";
                 fixture.detectChanges();
-                expect(calendar.weekStart).toEqual(1);
+                expect(calendar.weekStart).toEqual(0);
 
                 calendar.weekStart = WEEKDAYS.FRIDAY;
                 expect(calendar.weekStart).toEqual(5);
@@ -2942,14 +2942,16 @@ describe("IgxCalendar - ", () => {
                 flush();
             }));
 
-            it("Should respect passing invalid value for locale, then setting weekStart.", fakeAsync(() => {
-                calendar.locale = "frrr";
-                calendar.weekStart = WEEKDAYS.FRIDAY;
-                fixture.detectChanges();
-
-                expect(calendar.locale).toEqual("fr");
-                expect(calendar.weekStart).toEqual(WEEKDAYS.FRIDAY);
+            it("Should throw error when setting incorrect locale", fakeAsync(() => {
+                let errorThrown;
+                try {
+                    calendar.locale = "frrr";
+                    fixture.detectChanges();
+                } catch(err) {
+                    errorThrown = err;
+                }
 
+                expect(errorThrown).not.toBeUndefined();
                 flush();
             }));
 

projects/igniteui-angular/src/lib/core/utils.ts

@@ -6,7 +6,7 @@ import {
     isPlatformBrowser,
     FormatWidth
 } from '@angular/common';
-import { DestroyRef, Inject, Injectable, InjectionToken, PLATFORM_ID, inject } from '@angular/core';
+import { DestroyRef, Inject, Injectable, InjectionToken, PLATFORM_ID, inject, ɵR3Injector as R3Injector } from '@angular/core';
 import { mergeWith } from 'lodash-es';
 import { NEVER, Observable, Subject } from 'rxjs';
 import { setImmediate } from './setImmediate';
@@ -596,9 +596,10 @@ export function onResourceChangeHandle(destroyObj: Subject<any> | DestroyRef, ca
     const removeHandler = () => {
         getI18nManager().removeEventListener("onResourceChange", onResourceChangeHandler);
     }
-    if (destroyObj instanceof DestroyRef) {
+    if (destroyObj instanceof DestroyRef || destroyObj instanceof R3Injector) {
+        // R3Injector is for tests only
         destroyObj.onDestroy(() => removeHandler());
-    } else {
+    } else if (destroyObj) {
         destroyObj.subscribe({
             complete: () =>  removeHandler()
         });
@@ -666,11 +667,11 @@ export function formatDate(value: Date | string | number | null | undefined, for
     if (format === 'short' || format === 'medium' || format === 'long' || format === 'full') {
         dateStyle = format;
         timeStyle = format;
-    } else if (format.includes('Date')) {
+    } else if (format?.includes('Date')) {
         dateStyle = format.replace('Date', '');
-    } else if (format.includes('Time')) {
+    } else if (format?.includes('Time')) {
         timeStyle = format.replace('Time', '');
-    } else {
+    } else if (format) {
         return getI18nManager().formatDateCustomFormat(value, locale, format, timezone);
     }
     const options: Intl.DateTimeFormatOptions = {
@@ -681,18 +682,18 @@ export function formatDate(value: Date | string | number | null | undefined, for
     return getI18nManager().formatDateTime(value, locale, options);
 }
 
-function parseDigitsInfo(value: string) {
+function parseDigitsInfo(value?: string) {
     let minIntegerDigits = undefined, minFractionDigits = undefined, maxFractionDigits = undefined;
     if (value) {
         const parts = value.split("-");
         const innerParts = parts[0].split(".");
-        if (innerParts[0] !== "1") {
+        if (innerParts.length > 0) {
             minIntegerDigits = parseInt(innerParts[0]);
         }
-        if (innerParts.length == 2 && innerParts[1] !== "0") {
+        if (innerParts.length == 2) {
             minFractionDigits = parseInt(innerParts[1]);
         }
-        if (parts.length == 2 && parts[1] !== "3") {
+        if (parts.length == 2) {
             maxFractionDigits = parseInt(parts[1]);
         }
     }
@@ -758,6 +759,7 @@ export function getCurrencySymbol(currencyCode: string, locale?: string,  curren
 
 export function getLocaleFirstDayOfWeek(locale?: string) {
     try {
+        // Angular returns 0 for Sunday...
         return ngGetLocaleFirstDayOfWeek(locale);
     } catch {}
     return getI18nManager().getFirstDayOfWeek(locale);

projects/igniteui-angular/src/lib/date-range-picker/date-range-picker.component.spec.ts

@@ -127,7 +127,9 @@ describe('IgxDateRangePicker', () => {
             mockAnimationService = new IgxAngularAnimationService(mockAnimationBuilder);
             overlay = new IgxOverlayService(
                 mockApplicationRef, mockDocument, mockNgZone, mockPlatformUtil, mockAnimationService);
-            mockCalendar = new IgxCalendarComponent(platform, 'en');
+            mockCalendar = TestBed.runInInjectionContext(() => {
+                return new IgxCalendarComponent(platform, 'en');
+            });
 
             mockDaysView = {
                 focusActiveDate: jasmine.createSpy()