tests.py

from django.test import TestCase
from rest_framework import status
from rest_framework import APIClient

class ArticleTestCase(TestCase):
  
  def setUp(self):
    """Define test variable"""
    self.client = APIClient()
    self.article_data = {'title': 'Hello world', 'content':'hello world, this is a group activity that involves tdd'}
    self.response = self.client.post("api/v1/articles",
      self.article_data,
      format="json")
    
  def test_user_can_create_article(self)
    """Test user can create article"""
    self.assertEqual(self.response.status_code, status.HTTP_201_CREATED)
    
   def test_user_can_edit_article(self):
    """Test user can edit the article"""
    new_data={"title":"hello", "content":"Edited aricle"}
    self.response = self.client.post("api/v1/articles/",
      self.article_data,
      format="json")
    self.response = self.client.put("api/v1/articles/1",
      self.new_data,
      format="json")
    self.assertEqual(self.response.status_code, status.HTTP_200_OK)
    
    
  

follow the pep8 standard to ensure the lines are not more than 70 characters.

Nice work on the two test cases. You chose a unique feature to test on.

I would suggest you implement more assertions based on the response data.

For example

self.assertIn(b'Article created successfully', response.data)