old_contents: from django import test
  
  from oscar.apps.dashboard.vouchers import forms
  
  
  class TestVoucherForm(test.TestCase):
  
      def test_handles_empty_date_fields(self):
          data = {'code': '',
                  'name': '',
                  'start_date': '',
                  'end_date': '',
                  'benefit_range': '',
                  'benefit_type': 'Percentage',
                  'usage': 'Single use'}
          form = forms.VoucherForm(data=data)
          try:
              form.is_valid()
          except Exception as e:
              import traceback
              self.fail("Validating form failed: %s\n\n%s" % (
                  e.message, traceback.format_exc()))
  
new_contents: from django import test
  
  from oscar.apps.dashboard.vouchers import forms
  
  
  class TestVoucherForm(test.TestCase):
  
      def test_doesnt_crash_on_empty_date_fields(self):
          """
          There was a bug fixed in 02b3644 where the voucher form would raise an
          exception (instead of just failing validation) when being called with
          empty fields. This tests exists to prevent a regression.
          """
          data = {
              'code': '',
              'name': '',
              'start_date': '',
              'end_date': '',
              'benefit_range': '',
              'benefit_type': 'Percentage',
              'usage': 'Single use',
          }
          form = forms.VoucherForm(data=data)
          try:
              form.is_valid()
          except Exception as e:
              import traceback
              self.fail(
                  "Exception raised while validating voucher form: %s\n\n%s" % (
                      e.message, traceback.format_exc()))
  
subject: Change wording for voucher form test