Add test to check adding/removing of a voucher

tests/integration/basket/test_views.py

 
 from oscar.apps.basket import views
 from oscar.test import factories
+from oscar.test.testcases import WebTestCase
 from tests.fixtures import RequestFactory
+from tests.functional.checkout import CheckoutMixin
 
 
 class TestVoucherAddView(TestCase):
         request = RequestFactory().get(self.url)
         view = views.BasketView(request=request)
         self.assertIsNone(view.get_default_shipping_address())
+
+
+class TestVoucherViews(CheckoutMixin, WebTestCase):
+    csrf_checks = False
+
+    def setUp(self):
+        self.voucher = factories.create_voucher()
+        super().setUp()
+
+    def test_add_voucher(self):
+        """
+        Checks that voucher can be added to basket through appropriate view.
+        """
+        self.add_product_to_basket()
+
+        assert self.voucher.basket_set.count() == 0
+
+        response = self.post(reverse('basket:vouchers-add'), params={'code': self.voucher.code})
+        self.assertRedirectsTo(response, 'basket:summary')
+        assert self.voucher.basket_set.count() == 1
+
+    def test_remove_voucher(self):
+        """
+        Checks that voucher can be removed from basket through appropriate view.
+        """
+        self.add_product_to_basket()
+        self.add_voucher_to_basket(voucher=self.voucher)
+
+        assert self.voucher.basket_set.count() == 1
+
+        response = self.post(reverse('basket:vouchers-remove', kwargs={'pk': self.voucher.id}))
+        self.assertRedirectsTo(response, 'basket:summary')
+        assert self.voucher.basket_set.count() == 0