added role column to worker list. Issue #238

See issue #238 (closed) I understand this might be not that useful since this info can be found on the worker details but you can now search for doctors etc. I also did it to understand the way role filters work. I created a property method to access the role. Why is the first role the role of the worker?

smash/web/tests/models/test_worker.py

@@ -91,3 +91,29 @@ class WorkerModelTests(TestCase):
         worker.roles.update(role="unk")
         with self.assertRaises(Exception):
             worker_type_by_worker(worker)
+
+    #worker role tests
+
+    def test_worker_role_by_worker_without_role(self):
+        self.assertEqual(WORKER_STAFF, Worker().role)
+
+    def test_worker_role_by_worker_with_secretary_role(self):
+        worker = create_worker()
+        worker.roles.update(role=ROLE_CHOICES_SECRETARY)
+        self.assertEqual(ROLE_CHOICES_SECRETARY, worker.role)
+
+    def test_worker_role_by_worker_with_health_partner_role(self):
+        worker = create_worker()
+        worker.roles.update(role=ROLE_CHOICES_HEALTH_PARTNER)
+        self.assertEqual(ROLE_CHOICES_HEALTH_PARTNER, worker.role)
+
+    def test_worker_role_by_worker_with_voucher_partner_role(self):
+        worker = create_worker()
+        worker.roles.update(role=ROLE_CHOICES_VOUCHER_PARTNER)
+        self.assertEqual(ROLE_CHOICES_VOUCHER_PARTNER, worker.role)
+
+    def test_worker_role_by_worker_with_invalid_role(self):
+        worker = create_worker()
+        worker.roles.update(role="unk")
+        with self.assertRaises(Exception):
+            worker.role