Add 'View Consent' button to dashboard when required

Enterprise customers can require user to agree to Data Sharing Consent
form before they can access a course. We now add it conditionally to
Course Dashboard when it's required so it's apparent to user and they
have a way to revist the consent form if they've previously declined or
the course has not yet started.

WL-1281

common/djangoapps/student/tests/test_views.py

@@ -7,6 +7,7 @@ import json
 import unittest
 
 import ddt
+import mock
 import pytz
 from django.conf import settings
 from django.core.urlresolvers import reverse
@@ -335,3 +336,43 @@ class StudentDashboardTests(SharedModuleStoreTestCase, MilestonesTestCaseMixin):
         remove_prerequisite_course(self.course.id, get_course_milestones(self.course.id)[0])
         response = self.client.get(reverse('dashboard'))
         self.assertNotIn('<div class="prerequisites">', response.content)
+
+    @mock.patch('student.views.consent_needed_for_course')
+    @mock.patch('student.views.enterprise_customer_for_request')
+    @ddt.data(
+        (True, True, True),
+        (True, True, False),
+        (True, False, False),
+        (False, True, False),
+        (False, False, False),
+    )
+    @ddt.unpack
+    def test_enterprise_view_consent_for_course(
+            self,
+            enterprise_enabled,
+            consent_needed,
+            future_course,
+            mock_enterprise_customer,
+            mock_consent_necessary
+    ):
+        """
+        Verify that the 'View Consent' icon show up if data sharing consent turned on
+        for enterprise customer
+        """
+        if future_course:
+            self.course = CourseFactory.create(start=self.TOMORROW, emit_signals=True)
+        else:
+            self.course = CourseFactory.create(emit_signals=True)
+        self.course_enrollment = CourseEnrollmentFactory(course_id=self.course.id, user=self.user)
+
+        if enterprise_enabled:
+            mock_enterprise_customer.return_value = {'name': 'TestEnterprise', 'uuid': 'abc123xxx'}
+        else:
+            mock_enterprise_customer.return_value = None
+
+        mock_consent_necessary.return_value = consent_needed
+
+        # Assert 'View Consent' button shows up appropriately
+        response = self.client.get(reverse('dashboard'))
+        self.assertEquals('View Consent' in response.content, enterprise_enabled and consent_needed)
+        self.assertEquals('TestEnterprise' in response.content, enterprise_enabled and consent_needed)