Display deselected message with source if True

ynr/apps/elections/uk/templates/candidates/person-view.html

@@ -142,7 +142,13 @@ <h2>Candidacies:</h2>
         {% else %}
            Contesting the {{ election_data.name }} ({{ election_data.election_date }})
         {% endif %}</dt>
+
       <dd>{{ person|post_in_election:election_data }}</dd>
+      {% for membership in person.memberships.all %}
+          {% if membership.deselected %}
+            <dd>This candidate has been deselected by their party, but will remain on the ballot paper. <a href="{{ membership.deselected_source }}">Learn more<a>.</dd>
+          {% endif %}
+      {% endfor %}
 
     {% empty %}
       <p>No candidacies known at the moment.</p>

ynr/apps/people/tests/test_person_view.py

@@ -151,3 +151,12 @@ def test_previous_party_affiliations(self):
         self.assertContains(
             response, self.membership.previous_party_affiliations.all()[0].name
         )
+
+    def test_deselected_membership(self):
+        membership = self.person.memberships.first()
+        membership.deselected = True
+        membership.deselected_source = "https://www.electoralcommission.org.uk/"
+        membership.save()
+        response = self.app.get(self.person.get_absolute_url())
+        deselected_text = """<dd>This candidate has been deselected by their party, but will remain on the ballot paper. <a href="https://www.electoralcommission.org.uk/">Learn more<a>.</dd>"""
+        self.assertContains(response, deselected_text)