fix(idle): check expiry on timeout doCountdown

[On behalf of Lexmark International, Inc] Check expiry in docountdown to see if it has changed and if so interrupt. For multi-tab support.

modules/core/src/idle.spec.ts

@@ -404,6 +404,27 @@ describe('core/Idle', () => {
         instance.stop();
       }));
 
+      it('emits an onInterrupt event when the countdown ticks and expiry last has been updated', fakeAsync(() => {
+        spyOn(instance.onInterrupt, 'emit').and.callThrough();
+
+        instance.setTimeout(3);
+        expiry.mockNow = new Date();
+        instance.watch();
+
+        expiry.mockNow = new Date(expiry.now().getTime() + instance.getIdle() * 1000);
+        tick(3000);
+        expect(instance.isIdling()).toBe(true);
+
+        tick(1000);  // going once
+        tick(1000);  // going twice
+        expiry.last(new Date(expiry.now().getTime() + 6000));
+        tick(1000);  // going thrice
+
+        expect(instance.onInterrupt.emit).toHaveBeenCalledTimes(1);
+
+        instance.stop();
+      }));
+
       it('does not emit an onTimeoutWarning when timeout is disabled', fakeAsync(() => {
         spyOn(instance.onTimeoutWarning, 'emit').and.callThrough();
 

modules/core/src/idle.ts

@@ -343,6 +343,15 @@ export class Idle implements OnDestroy {
   }
 
   private doCountdown(): void {
+    let timeout = !this.timeoutVal ? 0 : this.timeoutVal;
+    let now: Date = this.expiry.now();
+    let diff: Number = this.expiry.last().getTime() - now.getTime() - (timeout * 1000);
+    if (diff > 0) {
+      this.safeClearInterval('timeoutHandle');
+      this.interrupt(true);
+      return;
+    }
+
     if (!this.idling) {
       return;
     }