new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  from django.test import TestCase
  from django.contrib.sites.models import Site
  from django.contrib.auth import get_user_model
  from django.core.files import File
  
  from opps.articles.models import Post
  from opps.channels.models import Channel
  from opps.images.models import Image
  
  
  class PostModelTest(TestCase):
  
      def setUp(self):
          User = get_user_model()
          self.user = User.objects.create(username=u'test', password='test')
          self.site = Site.objects.filter(name=u'example.com').get()
          self.channel = Channel.objects.create(name=u'Home', slug=u'home',
                                                description=u'home page',
                                                site=self.site, user=self.user)
  
          image = File(open("opps/__init__.py"), "test_file.png")
          self.image = Image.objects.create(site=self.site, title='test',
                                            image=image, user=self.user)
  
          self.post = Post.objects.create(
              title=u'Basic test',
              slug=u'basic-test',
              short_title=u'Write basict test for Article type Post',
              content=u'This field is context',
              main_image=self.image,
              channel=self.channel,
              user=self.user
          )
  
      def test_basic_post_exist(self):
          post = Post.objects.all()
  
          self.assertTrue(post)
          self.assertEqual(post[0], self.post)
  
subject: Add test_basic_post_exist on articles