Add link to delete a template

This is a link not a button because:
- it’s less prominent—delete is an infrequent action
- it’s a two-step process, and only the second part changes any data (so it has
  a button)

tests/app/main/views/test_templates.py

@@ -11,12 +11,12 @@ def test_should_return_list_of_all_templates(notifications_admin, notifications_
     assert response.status_code == 200
 
 
-def test_should_show_page_for_one_templates(notifications_admin, notifications_admin_db, notify_db_session):
+def test_should_show_page_for_one_template(notifications_admin, notifications_admin_db, notify_db_session):
     with notifications_admin.test_request_context():
         with notifications_admin.test_client() as client:
             user = create_test_user('active')
             client.login(user)
-            response = client.get('/services/123/templates/template')
+            response = client.get('/services/123/templates/1')
 
     assert response.status_code == 200
 
@@ -26,7 +26,29 @@ def test_should_redirect_when_saving_a_template(notifications_admin, notificatio
         with notifications_admin.test_client() as client:
             user = create_test_user('active')
             client.login(user)
-            response = client.post('/services/123/templates/template')
+            response = client.post('/services/123/templates/1')
+
+    assert response.status_code == 302
+    assert response.location == 'http://localhost/services/123/templates'
+
+
+def test_should_show_delete_template_page(notifications_admin, notifications_admin_db, notify_db_session):
+    with notifications_admin.test_request_context():
+        with notifications_admin.test_client() as client:
+            user = create_test_user('active')
+            client.login(user)
+            response = client.get('/services/123/templates/1/delete')
+
+    assert response.status_code == 200
+    assert 'Are you sure' in response.get_data(as_text=True)
+
+
+def test_should_redirect_when_deleting_a_template(notifications_admin, notifications_admin_db, notify_db_session):
+    with notifications_admin.test_request_context():
+        with notifications_admin.test_client() as client:
+            user = create_test_user('active')
+            client.login(user)
+            response = client.post('/services/123/templates/1/delete')
 
     assert response.status_code == 302
     assert response.location == 'http://localhost/services/123/templates'