feat(pagination): display ten articles per page

- Add a default pagination class

[Starts #162949227]

authors/apps/core/pagination.py

@@ -0,0 +1,14 @@
+"""Custom pagination class """
+from rest_framework.pagination import PageNumberPagination
+from rest_framework.response import Response
+
+class CustomPagination(PageNumberPagination):
+    def get_paginated_response(self, data):
+        return Response({
+            'pages': {
+                'next_page': self.get_next_link(),
+                'previous_page': self.get_previous_link()
+            },
+            'count': self.page.paginator.count,
+            'results': data
+        })

authors/settings.py

@@ -155,6 +155,8 @@
     'DEFAULT_AUTHENTICATION_CLASSES': (
         'rest_framework_jwt.authentication.JSONWebTokenAuthentication',
     ),
+    'DEFAULT_PAGINATION_CLASS': 'authors.apps.core.pagination.CustomPagination',
+    'PAGE_SIZE': 10
 }
 
 # Jwt configuration

authors/tests/base_test.py

@@ -111,7 +111,25 @@ def setUp(self):
         self.reset_password_invalid_email = {
             "email": "kenyamoja@gmail.com"
         }
+
+    def get_token(self):
+        """Register and login a user"""
 
+        # register user
+        self.client.post(
+            self.user_url,
+            self.user_data,
+            format='json'
+        )
+        self.client.get(self.get_verify_url(self.user_data))
+        response = self.client.post(
+            self.login_url,
+            self.login_data,
+            format="json"
+        )
+        token = response.data['token']
+        return token
+
     def get_verify_url(self, user):
 
         self.register_user()

authors/tests/test_pagination.py

@@ -0,0 +1,22 @@
+# python and django imports
+from django.urls import reverse
+from rest_framework import status
+
+# local imports
+from .base_test import TestBase
+
+
+class TestPagination(TestBase):
+    """This class has tests for pagination setting."""
+
+    def test_profiles_pagination(self):
+        token = self.get_token()
+        url = reverse('profiles:all_profiles')
+        self.client.credentials(HTTP_AUTHORIZATION='Bearer ' + token)
+        response = self.client.get(url)
+        self.assertIn('count', response.data)
+        self.assertIn('results', response.data)
+        self.assertEquals(response.status_code, status.HTTP_200_OK)
+        self.assertIn('next_page', response.data['pages'])
+        self.assertIn('previous_page', response.data['pages'])
+