在内部使用susbcribe关闭后的Karma测试对话框

Question

所以这是我要测试的示例方法，我们有一个对话框，该方法在调用该方法时打开，并且当该对话框关闭时，我想将信息发布到数据库中并将信息保存在前面。结束。我真的不知道如何通过分支机构完成报道。

public addShift() {
        const dialogRef = this.addShiftDialog.open(ShiftDialogComponent, {
          height: '409px',
          minHeight: '409px',
          width: '560px',
          minWidth: '560px',
          disableClose: true,
          data: {
            shiftList: this.shiftsArray,
            title: 'Add Shift',
            infoRow: {
              daysWeek: '1111111',
              startTime: '08:00',
              finishTime: '14:00',
              duration: '6 hours',
              typeShift: 'Regular',
              comment: ''
            }
          }
        });

        dialogRef.afterClosed().subscribe(result => {
          if (result) {
            this.shiftService.postShift({
              terminalUuid: '4fa6b12d-6e1e-4f68-8104-04ee91ced995',
              typeShift: result.typeShift,
              startTime: result.startTime + ':00',
              finishTime: result.finishTime + ':00',
              daysWeek: result.daysWeek,
              comment: result.comment
            }).subscribe((data: any) => {
              result.uuid = data.payload.uuid;
              result.daysWeek = this.shiftService.getCodeDaysWeek(result.daysWeek);
              let times = this.shiftService.calculateTimes(result.startTime, result.finishTime);
              result.startTime = times[0];
              result.finishTime = times[1];
              result.duration = times[2];
              this.shiftsArray.push(result);
              this.shiftTable.renderRows();
            });
          }
        });