Django Rest Framework Test Klassenfehler

Question

Ich bekomme diesen seltsamen Fehler und ich kann die Ursache nicht verstehen. Ich habe diese Methode bereits aus meinem vorherigen Projekt ausprobiert, aber es ist mehr auf dem Front-End mit Selenium als rein API Testfälle. Hier

ist der Code:

from django.test import TestCase 
from django.core.urlresolvers import reverse 

from rest_framework import status 
from rest_framework.test import APITestCase 

from unittest import skip # This library is used to skip some class TestCase 

from . models import * 

import time # This library is used in case you want to put a sleep before proceeding to the next line of scripts 
import inspect # This library is used to print the method of that certain class.. inspect.stack()[0][3] 
import json # This library is for parsing the response.content 

# Create your tests here. 

url_1 = reverse('artists-list') # The URL endpoint for the artists which is /artists/ having POST and GET methods 
url_2 = reverse('artists-detail', kwargs={'artist_id':1}) # The URL endpoint for the artists which is /artists/:d having GET, PUT and DELETE methods 
url_3 = reverse('artists-detail', kwargs={'artist_id':3}) # Wrong id endpoint on purpose to check error response 

# Check the response if there is no given data 
class ArtistTestWithData(APITestCase): 
    # indent is just used to specify the tab size 
    # follow the json naming format 
    # Command: python manage.py dumpdata store.artist --indent=2 > store/fixtures/artists_2016_07_23.json 
    fixtures = ['artists_2016_07_23.json'] 

    # Check the response if there is a data within 
    def test_get(self): 
     # self.client attribute will be an APIClient instance 
     # Basically it will act as a client 
     response = self.client.get(url_1) 
     data = json.loads(response.content)["data"] 
     self.assertEqual(response.status_code, status.HTTP_200_OK) 
     self.assertNotEqual(len(data), 0) # There should be a data 
     # print ("%s.%s DONE - 1" % (self.__class__.__name__, inspect.stack()[0][3])) 

# Check the response if there is no given data 
class ArtistTest(APITestCase): 
    # For reusable of adding a single record 
    # To be used for POST, GET(detailed), PUT and DELETE 
    def _setup_add_record(self): 
     _data = {"name": "50 Cent", "birth_date":"2005-02-13"} 
     response = self.client.post(url_1, _data) 
     data = json.loads(response.content)["data"] 
     return (response, _data, data) 

    # Checks the records 
    def test_get(self): 
     # self.client attribute will be an APIClient instance 
     # Basically it will act as a client 
     response = self.client.get(url_1) 
     self.assertEqual(response.status_code, status.HTTP_204_NO_CONTENT) 
     self.assertEqual(response.content, '') # There should be no data 
     # self.assertEqual(len(data), 0) 
     # print ("%s.%s DONE - 1" % (self.__class__.__name__, inspect.stack()[0][3])) 

    # Creates the record 
    def test_post(self): 
     x = self._setup_add_record() 
     self.assertEqual(x[0].status_code, status.HTTP_201_CREATED) # Status 201 is the default when a new object is created 
     self.assertEqual(x[2], x[1]) # have the API return the updated (or created) representation as part of the response 
     self.assertEqual(Artist.objects.count(), 1) # Make sure that there is a craeted instance 
     self.assertEqual(Artist.objects.get().name, '50 Cent') # Double checking if the last post is the created instance 

    # Get a specific record 
    def test_get_detail(self): 
     x = self._setup_add_record() 
     response = self.client.get(url_2) 
     data = json.loads(response.content)["data"] 
     self.assertEqual(response.status_code, status.HTTP_200_OK) 
     self.assertEqual(data, x[1]) 
     self.assertNotEqual(len(data), 0) 

    # Update a specific record 
    def test_put(self): 
     x = self._setup_add_record() 
     update = {"name": "60 Cents", "birth_date":"2005-02-13"} 
     response = self.client.put(url_2, update) 
     data = json.loads(response.content)["data"] 
     self.assertEqual(response.status_code, status.HTTP_200_OK) 
     self.assertNotEqual(data, x[1]) 
     self.assertNotEqual(Artist.objects.get().name, '50 Cent') # Check if it is still the old name 
     self.assertEqual(Artist.objects.get().name, '60 Cents') # Check the new name 

    def test_delete(self): 
     x = self._setup_add_record() 
     response = self.client.delete(url_2) 
     self.assertEqual(response.status_code, status.HTTP_200_OK) 
     response = self.client.get(url_2) 
     self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND) 

# Check the response if there is error on requests 
class ArtistTestErrors(APITestCase): 
    def test_post(self): 
     _data = {"birth_date":"2005-02-13"} 
     response = self.client.post(url_1, _data) 
     data = json.loads(response.content)["errors"] # checks the errors 
     self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST) 
     self.assertNotEqual(len(data), 0) 

    def test_get_detail(self): 
     ArtistTest._setup_add_record(self) 
     response = self.client.get(url_3) 
     self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND) 

Dies ist der Fehler:

line 103, in test_get_detail 
    ArtistTest._setup_add_record(self) 
TypeError: unbound method _setup_add_record() must be called with ArtistTest instance as first argument (got ArtistTestErrors instance instead) 

Answer 1

Das Problem ist in dem unten stehenden Code:

def test_get_detail(self): 
    ArtistTest._setup_add_record(self) 
    response = self.client.get(url_3) 
    self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND) 

Sie nicht Instanzmethode wie ArtistTest._setup_add_record aufrufen . Sie müssen eine Instanz alle rufen Sie die Methode wie ArtistTest()._setup_add_record

erstellen Wenn Sie die Methode verwenden möchten, ist andere Klasse dann für die Vererbung gehen/Mischen:

class ArtistRecordSetupMixing(): 
    # For reusable of adding a single record 
    # To be used for POST, GET(detailed), PUT and DELETE 
    def _setup_add_record(self): 
     _data = {"name": "50 Cent", "birth_date":"2005-02-13"} 
     response = self.client.post(url_1, _data) 
     data = json.loads(response.content)["data"] 
     return (response, _data, data) 

Und in Test Fall, in dem Sie die Funktionalität wollen:

# Check the response if there is no given data 
class ArtistTest(ArtistRecordSetupMixing, APITestCase): 
    pass