test: harden business boundary conditions

apps/server/src/attendance/attendance.service.ts

@@ -276,16 +276,13 @@ export class AttendanceService {
   ) {
     const schedule = await this.getScheduleOccurrence(scheduleId, lessonDate);
     const now = new Date();
-    const today = [
-      now.getFullYear(),
-      String(now.getMonth() + 1).padStart(2, '0'),
-      String(now.getDate()).padStart(2, '0'),
-    ].join('-');
+    const courseClock = this.getCourseClock(now);
+    const today = courseClock.date;
     if (lessonDate > today) throw new BadRequestException('课程尚未开始，不能拉取考勤');
     if (lessonDate === today) {
       const [hour, minute] = schedule.startTime.split(':').map(Number);
       const startMinute = hour * 60 + minute;
-      const currentMinute = now.getHours() * 60 + now.getMinutes();
+      const currentMinute = courseClock.minutes;
       if (currentMinute < startMinute) {
         throw new BadRequestException('课程尚未开始，不能拉取考勤');
       }
@@ -676,6 +673,20 @@ export class AttendanceService {
     return hour * 60 + minute;
   }
 
+  private getCourseClock(date: Date): { date: string; minutes: number } {
+    const parts = Object.fromEntries(
+      new Intl.DateTimeFormat('en-CA', {
+        timeZone: 'Asia/Shanghai',
+        year: 'numeric', month: '2-digit', day: '2-digit',
+        hour: '2-digit', minute: '2-digit', hourCycle: 'h23',
+      }).formatToParts(date).filter((part) => part.type !== 'literal').map((part) => [part.type, part.value]),
+    );
+    return {
+      date: `${parts.year}-${parts.month}-${parts.day}`,
+      minutes: Number(parts.hour) * 60 + Number(parts.minute),
+    };
+  }
+
   private shiftDate(date: string, days: number): string {
     const shifted = new Date(`${date}T00:00:00.000Z`);
     shifted.setUTCDate(shifted.getUTCDate() + days);