added test for node types rest api call

aiida/backends/tests/restapi.py

@@ -876,3 +876,18 @@ def test_schema(self):
                 available_properties = response["data"]["fields"].keys()
                 for prop in response["data"]["ordering"]:
                     self.assertIn(prop, available_properties)
+
+    def test_node_types(self):
+        """
+        Test the rest api call to get list of available node types
+        """
+        url = self.get_url_prefix() + '/nodes/types'
+        with self.app.test_client() as client:
+            rv = client.get(url)
+            response = json.loads(rv.data)
+            self.assertEqual(response["data"]["calculation"], ["calculation.Calculation."])
+            expected_data_types = ["data.array.kpoints.KpointsData.", "data.cif.CifData.", "data.parameter.ParameterData.", "data.structure.StructureData."]
+            self.assertEqual(response["data"]["data"], expected_data_types)
+            RESTApiTestCase.compare_extra_response_data(self, "nodes",
+                                                        url,
+                                                        response)