Redirect to ecommerce checkout on the PayAndVerify view.

When a user tries to purchase a verified certificate for the first
time or upgrade to verified, if the ecommerce checkout is enabled
redirect the user to the ecommerce checkout basket.

lms/djangoapps/verify_student/tests/test_views.py

@@ -35,7 +35,8 @@ from course_modes.models import CourseMode
 from course_modes.tests.factories import CourseModeFactory
 from courseware.url_helpers import get_redirect_url
 from common.test.utils import XssTestMixin
-from commerce.tests import TEST_PAYMENT_DATA, TEST_API_URL, TEST_API_SIGNING_KEY
+from commerce.models import CommerceConfiguration
+from commerce.tests import TEST_PAYMENT_DATA, TEST_API_URL, TEST_API_SIGNING_KEY, TEST_PUBLIC_URL_ROOT
 from embargo.test_utils import restrict_course
 from openedx.core.djangoapps.user_api.accounts.api import get_account_settings
 from openedx.core.djangoapps.theming.test_util import with_comprehensive_theme
@@ -134,6 +135,34 @@ class TestPayAndVerifyView(UrlResetMixin, ModuleStoreTestCase, XssTestMixin):
         ])
         self._assert_upgrade_session_flag(False)
 
+    @httpretty.activate
+    @override_settings(
+        ECOMMERCE_API_URL=TEST_API_URL,
+        ECOMMERCE_API_SIGNING_KEY=TEST_API_SIGNING_KEY,
+        ECOMMERCE_PUBLIC_URL_ROOT=TEST_PUBLIC_URL_ROOT
+    )
+    def test_start_flow_with_ecommerce(self):
+        """Verify user gets redirected to ecommerce checkout when ecommerce checkout is enabled."""
+        checkout_page = '/test_basket/'
+        sku = 'TESTSKU'
+        # When passing a SKU ecommerce api gets called.
+        httpretty.register_uri(
+            httpretty.GET,
+            "{}/payment/processors/".format(TEST_API_URL),
+            body=json.dumps(['foo', 'bar']),
+            content_type="application/json",
+        )
+        httpretty.register_uri(httpretty.GET, "{}{}".format(TEST_PUBLIC_URL_ROOT, checkout_page))
+        CommerceConfiguration.objects.create(
+            checkout_on_ecommerce_service=True,
+            single_course_checkout_page=checkout_page
+        )
+        course = self._create_course('verified', sku=sku)
+        self._enroll(course.id)
+        response = self._get_page('verify_student_start_flow', course.id, expected_status_code=302)
+        expected_page = '{}{}?sku={}'.format(TEST_PUBLIC_URL_ROOT, checkout_page, sku)
+        self.assertRedirects(response, expected_page, fetch_redirect_response=False)
+
     @ddt.data(
         ("no-id-professional", "verify_student_start_flow"),
         ("no-id-professional", "verify_student_begin_flow")

lms/djangoapps/verify_student/views.py

@@ -30,7 +30,7 @@ from eventtracking import tracker
 from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import CourseKey, UsageKey
 
-from commerce.utils import audit_log
+from commerce.utils import audit_log, EcommerceService
 from course_modes.models import CourseMode
 from courseware.url_helpers import get_redirect_url
 from edx_rest_api_client.exceptions import SlumberBaseException
@@ -338,7 +338,10 @@ class PayAndVerifyView(View):
             already_verified,
             already_paid,
             is_enrolled,
-            course_key
+            course_key,
+            user_is_trying_to_pay,
+            request.user,
+            relevant_course_mode.sku
         )
         if redirect_response is not None:
             return redirect_response
@@ -429,12 +432,8 @@ class PayAndVerifyView(View):
         return render_to_response("verify_student/pay_and_verify.html", context)
 
     def _redirect_if_necessary(
-        self,
-        message,
-        already_verified,
-        already_paid,
-        is_enrolled,
-        course_key
+        self, message, already_verified, already_paid, is_enrolled, course_key,  # pylint: disable=bad-continuation
+        user_is_trying_to_pay, user, sku  # pylint: disable=bad-continuation
     ):
         """Redirect the user to a more appropriate page if necessary.
 
@@ -493,6 +492,13 @@ class PayAndVerifyView(View):
             else:
                 url = reverse('verify_student_start_flow', kwargs=course_kwargs)
 
+        if user_is_trying_to_pay and user.is_active:
+            # IIf the user is trying to pay, has activated their account, and the ecommerce service
+            # is enabled redirect him to the ecommerce checkout page.
+            ecommerce_service = EcommerceService()
+            if ecommerce_service.is_enabled(user):
+                url = ecommerce_service.checkout_page_url(sku)
+
         # Redirect if necessary, otherwise implicitly return None
         if url is not None:
             return redirect(url)