Add an endpoint to retrieve a WorkerVersion by its ID

Ref tasks#22 (closed)

arkindex/dataimport/tests/test_workers_api.py

@@ -220,3 +220,23 @@ class TestWorkersWorkerVersions(FixtureAPITestCase):
             'revision': ['This field is required.'],
             'configuration': ['This field is required.']
         })
+
+    def test_retrieve_version_requires_login(self):
+        response = self.client.get(reverse('api:version-retrieve', kwargs={'pk': str(self.version_1.id)}))
+        self.assertEqual(response.status_code, status.HTTP_403_FORBIDDEN)
+
+    def test_retrieve_version_invalid_id(self):
+        self.client.force_login(self.user)
+        response = self.client.get(
+            reverse('api:version-retrieve', kwargs={'pk': '12341234-1234-1234-1234-123412341234'})
+        )
+        self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND)
+
+    def test_retrieve_version(self):
+        self.client.force_login(self.user)
+        response = self.client.get(reverse('api:version-retrieve', kwargs={'pk': str(self.version_1.id)}))
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        data = response.json()
+        self.assertEqual(data['id'], str(self.version_1.id))
+        self.assertEqual(data['configuration'], {"test": "test1"})
+        self.assertEqual(data['revision']['id'], str(self.rev.id))