public void testVolunteerShiftManagerSignVolunteerUpForShift()
        {
            IVolunteerShiftManager manager = new VolunteerShiftManager(_fakeShiftAccessor);

            int rows = manager.SignVolunteerUpForShift(1000001, 1000001);

            Assert.AreEqual(1, rows);
        }
 /// <summary>
 ///     AUTHOR: Timothy Lickteig
 ///     DATE: 2020-03-31
 ///     CHECKED BY: Zoey McDonald
 ///     Event handler for the add shift button
 /// </summary>
 private void BtnAddShift_Click(object sender, RoutedEventArgs e)
 {
     try
     {
         VolunteerShiftVM shift = (VolunteerShiftVM)dgShiftList.SelectedItem;
         _shiftManager.SignVolunteerUpForShift(_volunteerID, shift.VolunteerShiftID);
         this.Close();
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }