text: from django.contrib.auth import get_user_model
  from django.urls import reverse
  from django.test import TestCase
  from django.conf import settings
  
  from rest_framework.authentication import TokenAuthentication
  from rest_framework.permissions import IsAuthenticated
  from rest_framework.test import APIClient
  from rest_framework import status
  
  from core.models import Recipe, Tag, Ingredient
  from recipe.serializers import RecipeSerializer, RecipeDetailSerializer
  
  
  RECIPES_URL = reverse('recipe:recipe-list')
  
  
  def detail_url(recipe_id):
      """Return the detail url"""
      return reverse('recipe:recipe-detail', args=[recipe_id])
  
  
  def sample_tag(user, name='Sample Tag'):
      """Create the Tag"""
      return Tag.objects.create(user=user, name=name)
  
  
  def sample_ingredient(user, name='Sample Tag'):
      """Create the Tag"""
      return Ingredient.objects.create(user=user, name=name)
  
  
  def sample_recipe(user, **params):
      """Create the sample recipe"""
      defaults = {
          'title': 'Sample Recipe',
          'time_minutes': 10,
          'price': 5.00
      }
      defaults.update(params)
  
      return Recipe.objects.create(user=user, **defaults)
  
  
  class PublicRecipeTestApi(TestCase):
      """Test the public Api access"""
  
      def setUp(self):
          self.client = APIClient()
  
      def test_recipe_required(self):
          """Test the login required"""
          res = self.client.get(RECIPES_URL)
  
          self.assertEqual(res.status_code, status.HTTP_401_UNAUTHORIZED)
  
  
  class PrivateRecipeTestApi(TestCase):
      """Test private recipe API"""
  
      def setUp(self):
          self.client = APIClient()
          self.user = get_user_model().objects.create_user(
              email='test@test.com',
              password='testpass'
          )
          self.client.force_authenticate(self.user)
  
      def test_recipe_retrieve(self):
          """Test the retrieve all recipe"""
  
          sample_recipe(user=self.user)
          sample_recipe(user=self.user)
  
          res = self.client.get(RECIPES_URL)
  
          recipes = Recipe.objects.all().order_by('-id')
          serializers = RecipeSerializer(recipes, many=True)
          self.assertEqual(res.status_code, status.HTTP_200_OK)
          self.assertEqual(res.data, serializers.data)
  
      def test_recipe_limited_user(self):
          """Test limited access"""
  
          user2 = get_user_model().objects.create_user(
              email='notest@test.com',
              password='testpass'
          )
          sample_recipe(user=user2)
          sample_recipe(user=self.user)
  
          res = self.client.get(RECIPES_URL)
  
          recipe = Recipe.objects.filter(user=self.user)
          serializer = RecipeSerializer(recipe, many=True)
  
          self.assertEqual(res.status_code, status.HTTP_200_OK)
          self.assertEqual(len(res.data), 1)
          self.assertEqual(res.data, serializer.data)
  
      def test_recipe_detail(self):
          recipe = sample_recipe(user=self.user)
          recipe.tags.add(sample_tag(user=self.user))
          recipe.ingredients.add(sample_ingredient(user=self.user))
  
          url = detail_url(recipe.id)
  
          res = self.client.get(url)
  
          serializer = RecipeDetailSerializer(recipe)
  
          self.assertEqual(res.status_code, status.HTTP_200_OK)
          self.assertEqual(res.data, serializer.data)
  
      def test_basic_recipe(self):
          """Test Basic Recipe"""
          payload = {
              'title': 'Choclte Test',
              'time_minutes': 5,
              'price': 5.00
          }
          res = self.client.post(RECIPES_URL, payload)
  
          self.assertEqual(res.status_code, status.HTTP_201_CREATED)
          recipe = Recipe.objects.get(id=res.data['id'])
  
          for key in payload.keys():
              self.assertEqual(payload[key], getattr(recipe, key))
  
      def test_create_recipe_with_tags(self):
          """Create the recipe with tags"""
          tag1 = sample_tag(user=self.user, name='Vegan')
          tag2 = sample_tag(user=self.user, name='Desert')
  
          payload = {
              'title': 'Test Recipe',
              'tags': [tag1.id, tag2.id],
              'time_minutes': 5,
              'price': 5.00
          }
          res = self.client.post(RECIPES_URL, payload)
          recipe = Recipe.objects.get(id=res.data['id'])
          tags = recipe.tags.all()
          self.assertEqual(tags.count(), 2)
          self.assertIn(tag1, tags)
          self.assertIn(tag2, tags)
  
      def test_create_recipe_with_ingredient(self):
          """Create the recipe with ingredient"""
          ing1 = sample_ingredient(user=self.user, name='Pawser')
          ing2 = sample_ingredient(user=self.user, name='Toalt')
  
          payload = {
              'title': 'Test Recipe',
              'ingredients': [ing1.id, ing2.id],
              'time_minutes': 5,
              'price': 5.00
          }
  
          res = self.client.post(RECIPES_URL, payload)
  
          recipe = Recipe.objects.get(id=res.data['id'])
          ings = recipe.ingredients.all()
          self.assertEqual(ings.count(), 2)
          self.assertIn(ing1, ings)
          self.assertIn(ing1, ings)
  
      def test_partial_recipe_update(self):
          """Test the update"""
          recipe = sample_recipe(user=self.user)
          recipe.tags.add(sample_tag(user=self.user))
          new_tag = sample_tag(self.user, name='Curry')
          payload = {'title': 'New Recipe', 'tags': [new_tag.id]}
  
          url = detail_url(recipe.id)
  
          res = self.client.patch(url, payload)
          recipe.refresh_from_db()
          self.assertEqual(recipe.title, payload['title'])
          tags = recipe.tags.all()
          self.assertEqual(tags.count(), 1)
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  