fix(DateService): fix flakiness in UTC-diff-zone

The test for betweenHours() failed between 00:00 and 02:00 in Norwegian
summer time (UTC+2) because the wrong day was used. Fixed by
constructing dates with the supplied timezone.

src/blc/date.service.spec.ts

@@ -159,14 +159,24 @@ describe("DateService", () => {
 
   describe("betweenHours()", () => {
     it("should return true if date is between from hour and to hour", () => {
-      const date = moment().hour(12).minute(15).seconds(22).toDate();
+      const date = moment()
+        .tz("Europe/Oslo")
+        .hour(12)
+        .minute(15)
+        .seconds(22)
+        .toDate();
 
       return expect(dateService.betweenHours(date, 8, 18, "Europe/Oslo")).to.be
         .true;
     });
 
     it("should return false if date is not between from hour and to hour", () => {
-      const date = moment().hour(7).minute(15).seconds(22).toDate();
+      const date = moment()
+        .tz("Europe/Oslo")
+        .hour(7)
+        .minute(15)
+        .seconds(22)
+        .toDate();
 
       return expect(dateService.betweenHours(date, 8, 18, "Europe/Oslo")).to.be
         .false;

src/blc/date.service.ts

@@ -57,8 +57,8 @@ export class DateService {
     toHour: number,
     location: MomentLocation,
   ): boolean {
-    const from = moment.tz().hour(fromHour).minute(0).second(0);
-    const to = moment.tz().hour(toHour).minute(0).second(0);
+    const from = moment.tz(location).hour(fromHour).minute(0).second(0);
+    const to = moment.tz(location).hour(toHour).minute(0).second(0);
 
     return this.between(date, from.toDate(), to.toDate(), location);
   }