mattdrayer/determine-correct-checkout: Select proper checkout workflow based on context

lms/djangoapps/courseware/tests/test_views.py

@@ -450,7 +450,7 @@ class ViewsTestCase(ModuleStoreTestCase):
         self.assertEqual(response.status_code, 200)
         self.assertIn(in_cart_span, response.content)
 
-    def assert_enrollment_link_present(self, is_anonymous, _id=False):
+    def assert_enrollment_link_present(self, is_anonymous):
         """
         Prepare ecommerce checkout data and assert if the ecommerce link is contained in the response.
 
@@ -474,17 +474,13 @@ class ViewsTestCase(ModuleStoreTestCase):
         # Set up the edxmako middleware for this request to create the RequestContext
         mako_middleware_process_request(request)
 
-        # Construct the link for each of the four possibilities:
-        #      (1) shopping cart is disabled and the user is not logged in
-        #      (2) shopping cart is disabled and the user is logged in
-        #      (3) shopping cart is enabled and the user is not logged in
-        #      (4) shopping cart is enabled and the user is logged in
-        href = '<a href="{}?{}" class="add-to-cart"{}'.format(
-            checkout_page,
-            'sku=TEST123',
-            ' id="">' if _id else ">"
-        )
+        # Generate the course about page content
         response = views.course_about(request, unicode(course.id))
+
+        # Construct the link according the following scenarios and verify its presence in the response:
+        #      (1) shopping cart is enabled and the user is not logged in
+        #      (2) shopping cart is enabled and the user is logged in
+        href = '<a href="{uri_stem}?sku={sku}" class="add-to-cart">'.format(uri_stem=checkout_page, sku=sku)
         self.assertEqual(response.status_code, 200)
         self.assertIn(href, response.content)
 
@@ -500,8 +496,13 @@ class ViewsTestCase(ModuleStoreTestCase):
     @unittest.skipUnless(settings.FEATURES.get('ENABLE_SHOPPING_CART'), 'Shopping Cart not enabled in settings')
     @patch.dict(settings.FEATURES, {'ENABLE_PAID_COURSE_REGISTRATION': True})
     def test_ecommerce_checkout_shopping_cart_enabled(self, is_anonymous):
+        """
+        Two scenarios are being validated here -- authenticated/known user and unauthenticated/anonymous user
+        For a known user we expect the checkout link to point to Otto in a scenario where the CommerceConfiguration
+        is active and the course mode is PROFESSIONAL.
+        """
         if not is_anonymous:
-            self.assert_enrollment_link_present(is_anonymous=is_anonymous, _id=True)
+            self.assert_enrollment_link_present(is_anonymous=is_anonymous)
         else:
             request = self.request_factory.get("foo")
             self.assertEqual(EcommerceService().is_enabled(AnonymousUser()), False)

lms/djangoapps/courseware/views/views.py

@@ -575,14 +575,16 @@ def course_about(request, course_id):
         # If the ecommerce checkout flow is enabled and the mode of the course is
         # professional or no id professional, we construct links for the enrollment
         # button to add the course to the ecommerce basket.
+        ecomm_service = EcommerceService()
+        ecommerce_checkout = ecomm_service.is_enabled(request.user)
         ecommerce_checkout_link = ''
         ecommerce_bulk_checkout_link = ''
         professional_mode = None
-        ecomm_service = EcommerceService()
         is_professional_mode = CourseMode.PROFESSIONAL in modes or CourseMode.NO_ID_PROFESSIONAL_MODE in modes
-        if ecomm_service.is_enabled(request.user) and (is_professional_mode):
+        if ecommerce_checkout and is_professional_mode:
             professional_mode = modes.get(CourseMode.PROFESSIONAL, '') or \
                 modes.get(CourseMode.NO_ID_PROFESSIONAL_MODE, '')
+            if professional_mode.sku:
                 ecommerce_checkout_link = ecomm_service.checkout_page_url(professional_mode.sku)
             if professional_mode.bulk_sku:
                 ecommerce_bulk_checkout_link = ecomm_service.checkout_page_url(professional_mode.bulk_sku)
@@ -593,7 +595,9 @@ def course_about(request, course_id):
             settings.PAID_COURSE_REGISTRATION_CURRENCY[0]
         )
         course_price = get_cosmetic_display_price(course, registration_price)
-        can_add_course_to_cart = _is_shopping_cart_enabled and registration_price
+
+        # Determine which checkout workflow to use -- LMS shoppingcart or Otto basket
+        can_add_course_to_cart = _is_shopping_cart_enabled and registration_price and not ecommerce_checkout_link
 
         # Used to provide context to message to student if enrollment not allowed
         can_enroll = bool(has_access(request.user, 'enroll', course))
@@ -624,7 +628,7 @@ def course_about(request, course_id):
             'is_cosmetic_price_enabled': settings.FEATURES.get('ENABLE_COSMETIC_DISPLAY_PRICE'),
             'course_price': course_price,
             'in_cart': in_cart,
-            'ecommerce_checkout': ecomm_service.is_enabled(request.user),
+            'ecommerce_checkout': ecommerce_checkout,
             'ecommerce_checkout_link': ecommerce_checkout_link,
             'ecommerce_bulk_checkout_link': ecommerce_bulk_checkout_link,
             'professional_mode': professional_mode,