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https://github.com/encode/django-rest-framework.git
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519 lines
18 KiB
Python
519 lines
18 KiB
Python
from __future__ import unicode_literals
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import datetime
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from decimal import Decimal
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from django.core.paginator import Paginator
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from django.test import TestCase
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from django.utils import unittest
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from rest_framework import generics, status, pagination, filters, serializers
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from rest_framework.compat import django_filters
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from rest_framework.test import APIRequestFactory
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from .models import BasicModel, FilterableItem
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factory = APIRequestFactory()
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# Helper function to split arguments out of an url
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def split_arguments_from_url(url):
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if '?' not in url:
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return url
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path, args = url.split('?')
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args = dict(r.split('=') for r in args.split('&'))
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return path, args
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class RootView(generics.ListCreateAPIView):
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"""
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Example description for OPTIONS.
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"""
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model = BasicModel
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paginate_by = 10
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class DefaultPageSizeKwargView(generics.ListAPIView):
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"""
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View for testing default paginate_by_param usage
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"""
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model = BasicModel
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class PaginateByParamView(generics.ListAPIView):
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"""
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View for testing custom paginate_by_param usage
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"""
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model = BasicModel
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paginate_by_param = 'page_size'
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class MaxPaginateByView(generics.ListAPIView):
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"""
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View for testing custom max_paginate_by usage
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"""
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model = BasicModel
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paginate_by = 3
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max_paginate_by = 5
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paginate_by_param = 'page_size'
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class IntegrationTestPagination(TestCase):
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"""
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Integration tests for paginated list views.
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"""
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def setUp(self):
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"""
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Create 26 BasicModel instances.
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"""
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for char in 'abcdefghijklmnopqrstuvwxyz':
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BasicModel(text=char * 3).save()
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self.objects = BasicModel.objects
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self.data = [
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{'id': obj.id, 'text': obj.text}
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for obj in self.objects.all()
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]
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self.view = RootView.as_view()
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def test_get_paginated_root_view(self):
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"""
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GET requests to paginated ListCreateAPIView should return paginated results.
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"""
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request = factory.get('/')
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# Note: Database queries are a `SELECT COUNT`, and `SELECT <fields>`
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with self.assertNumQueries(2):
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response = self.view(request).render()
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self.assertEqual(response.status_code, status.HTTP_200_OK)
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self.assertEqual(response.data['count'], 26)
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self.assertEqual(response.data['results'], self.data[:10])
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self.assertNotEqual(response.data['next'], None)
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self.assertEqual(response.data['previous'], None)
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request = factory.get(*split_arguments_from_url(response.data['next']))
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with self.assertNumQueries(2):
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response = self.view(request).render()
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self.assertEqual(response.status_code, status.HTTP_200_OK)
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self.assertEqual(response.data['count'], 26)
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self.assertEqual(response.data['results'], self.data[10:20])
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self.assertNotEqual(response.data['next'], None)
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self.assertNotEqual(response.data['previous'], None)
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request = factory.get(*split_arguments_from_url(response.data['next']))
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with self.assertNumQueries(2):
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response = self.view(request).render()
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self.assertEqual(response.status_code, status.HTTP_200_OK)
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self.assertEqual(response.data['count'], 26)
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self.assertEqual(response.data['results'], self.data[20:])
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self.assertEqual(response.data['next'], None)
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self.assertNotEqual(response.data['previous'], None)
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class IntegrationTestPaginationAndFiltering(TestCase):
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def setUp(self):
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"""
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Create 50 FilterableItem instances.
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"""
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base_data = ('a', Decimal('0.25'), datetime.date(2012, 10, 8))
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for i in range(26):
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text = chr(i + ord(base_data[0])) * 3 # Produces string 'aaa', 'bbb', etc.
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decimal = base_data[1] + i
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date = base_data[2] - datetime.timedelta(days=i * 2)
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FilterableItem(text=text, decimal=decimal, date=date).save()
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self.objects = FilterableItem.objects
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self.data = [
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{'id': obj.id, 'text': obj.text, 'decimal': obj.decimal, 'date': obj.date}
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for obj in self.objects.all()
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]
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@unittest.skipUnless(django_filters, 'django-filter not installed')
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def test_get_django_filter_paginated_filtered_root_view(self):
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"""
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GET requests to paginated filtered ListCreateAPIView should return
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paginated results. The next and previous links should preserve the
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filtered parameters.
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"""
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class DecimalFilter(django_filters.FilterSet):
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decimal = django_filters.NumberFilter(lookup_type='lt')
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class Meta:
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model = FilterableItem
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fields = ['text', 'decimal', 'date']
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class FilterFieldsRootView(generics.ListCreateAPIView):
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model = FilterableItem
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paginate_by = 10
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filter_class = DecimalFilter
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filter_backends = (filters.DjangoFilterBackend,)
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view = FilterFieldsRootView.as_view()
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EXPECTED_NUM_QUERIES = 2
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request = factory.get('/', {'decimal': '15.20'})
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with self.assertNumQueries(EXPECTED_NUM_QUERIES):
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response = view(request).render()
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self.assertEqual(response.status_code, status.HTTP_200_OK)
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self.assertEqual(response.data['count'], 15)
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self.assertEqual(response.data['results'], self.data[:10])
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self.assertNotEqual(response.data['next'], None)
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self.assertEqual(response.data['previous'], None)
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request = factory.get(*split_arguments_from_url(response.data['next']))
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with self.assertNumQueries(EXPECTED_NUM_QUERIES):
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response = view(request).render()
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self.assertEqual(response.status_code, status.HTTP_200_OK)
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self.assertEqual(response.data['count'], 15)
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self.assertEqual(response.data['results'], self.data[10:15])
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self.assertEqual(response.data['next'], None)
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self.assertNotEqual(response.data['previous'], None)
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request = factory.get(*split_arguments_from_url(response.data['previous']))
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with self.assertNumQueries(EXPECTED_NUM_QUERIES):
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response = view(request).render()
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self.assertEqual(response.status_code, status.HTTP_200_OK)
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self.assertEqual(response.data['count'], 15)
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self.assertEqual(response.data['results'], self.data[:10])
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self.assertNotEqual(response.data['next'], None)
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self.assertEqual(response.data['previous'], None)
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def test_get_basic_paginated_filtered_root_view(self):
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"""
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Same as `test_get_django_filter_paginated_filtered_root_view`,
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except using a custom filter backend instead of the django-filter
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backend,
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"""
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class DecimalFilterBackend(filters.BaseFilterBackend):
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def filter_queryset(self, request, queryset, view):
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return queryset.filter(decimal__lt=Decimal(request.GET['decimal']))
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class BasicFilterFieldsRootView(generics.ListCreateAPIView):
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model = FilterableItem
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paginate_by = 10
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filter_backends = (DecimalFilterBackend,)
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view = BasicFilterFieldsRootView.as_view()
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request = factory.get('/', {'decimal': '15.20'})
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with self.assertNumQueries(2):
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response = view(request).render()
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self.assertEqual(response.status_code, status.HTTP_200_OK)
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self.assertEqual(response.data['count'], 15)
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self.assertEqual(response.data['results'], self.data[:10])
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self.assertNotEqual(response.data['next'], None)
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self.assertEqual(response.data['previous'], None)
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request = factory.get(*split_arguments_from_url(response.data['next']))
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with self.assertNumQueries(2):
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response = view(request).render()
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self.assertEqual(response.status_code, status.HTTP_200_OK)
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self.assertEqual(response.data['count'], 15)
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self.assertEqual(response.data['results'], self.data[10:15])
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self.assertEqual(response.data['next'], None)
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self.assertNotEqual(response.data['previous'], None)
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request = factory.get(*split_arguments_from_url(response.data['previous']))
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with self.assertNumQueries(2):
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response = view(request).render()
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self.assertEqual(response.status_code, status.HTTP_200_OK)
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self.assertEqual(response.data['count'], 15)
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self.assertEqual(response.data['results'], self.data[:10])
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self.assertNotEqual(response.data['next'], None)
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self.assertEqual(response.data['previous'], None)
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class PassOnContextPaginationSerializer(pagination.PaginationSerializer):
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class Meta:
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object_serializer_class = serializers.Serializer
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class UnitTestPagination(TestCase):
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"""
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Unit tests for pagination of primitive objects.
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"""
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def setUp(self):
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self.objects = [char * 3 for char in 'abcdefghijklmnopqrstuvwxyz']
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paginator = Paginator(self.objects, 10)
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self.first_page = paginator.page(1)
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self.last_page = paginator.page(3)
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def test_native_pagination(self):
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serializer = pagination.PaginationSerializer(self.first_page)
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self.assertEqual(serializer.data['count'], 26)
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self.assertEqual(serializer.data['next'], '?page=2')
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self.assertEqual(serializer.data['previous'], None)
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self.assertEqual(serializer.data['results'], self.objects[:10])
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serializer = pagination.PaginationSerializer(self.last_page)
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self.assertEqual(serializer.data['count'], 26)
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self.assertEqual(serializer.data['next'], None)
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self.assertEqual(serializer.data['previous'], '?page=2')
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self.assertEqual(serializer.data['results'], self.objects[20:])
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def test_context_available_in_result(self):
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"""
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Ensure context gets passed through to the object serializer.
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"""
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serializer = PassOnContextPaginationSerializer(self.first_page, context={'foo': 'bar'})
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serializer.data
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results = serializer.fields[serializer.results_field]
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self.assertEqual(serializer.context, results.context)
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class TestUnpaginated(TestCase):
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"""
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Tests for list views without pagination.
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"""
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def setUp(self):
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"""
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Create 13 BasicModel instances.
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"""
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for i in range(13):
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BasicModel(text=i).save()
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self.objects = BasicModel.objects
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self.data = [
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{'id': obj.id, 'text': obj.text}
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for obj in self.objects.all()
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]
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self.view = DefaultPageSizeKwargView.as_view()
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def test_unpaginated(self):
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"""
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Tests the default page size for this view.
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no page size --> no limit --> no meta data
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"""
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request = factory.get('/')
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response = self.view(request)
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self.assertEqual(response.data, self.data)
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class TestCustomPaginateByParam(TestCase):
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"""
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Tests for list views with default page size kwarg
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"""
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def setUp(self):
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"""
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Create 13 BasicModel instances.
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"""
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for i in range(13):
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BasicModel(text=i).save()
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self.objects = BasicModel.objects
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self.data = [
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{'id': obj.id, 'text': obj.text}
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for obj in self.objects.all()
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]
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self.view = PaginateByParamView.as_view()
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def test_default_page_size(self):
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"""
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Tests the default page size for this view.
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no page size --> no limit --> no meta data
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"""
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request = factory.get('/')
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response = self.view(request).render()
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self.assertEqual(response.data, self.data)
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def test_paginate_by_param(self):
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"""
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If paginate_by_param is set, the new kwarg should limit per view requests.
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"""
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request = factory.get('/', {'page_size': 5})
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response = self.view(request).render()
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self.assertEqual(response.data['count'], 13)
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self.assertEqual(response.data['results'], self.data[:5])
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class TestMaxPaginateByParam(TestCase):
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"""
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Tests for list views with max_paginate_by kwarg
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"""
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def setUp(self):
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"""
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Create 13 BasicModel instances.
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"""
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for i in range(13):
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BasicModel(text=i).save()
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self.objects = BasicModel.objects
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self.data = [
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{'id': obj.id, 'text': obj.text}
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for obj in self.objects.all()
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]
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self.view = MaxPaginateByView.as_view()
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def test_max_paginate_by(self):
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"""
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If max_paginate_by is set, it should limit page size for the view.
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"""
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request = factory.get('/', data={'page_size': 10})
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response = self.view(request).render()
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self.assertEqual(response.data['count'], 13)
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self.assertEqual(response.data['results'], self.data[:5])
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def test_max_paginate_by_without_page_size_param(self):
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"""
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If max_paginate_by is set, but client does not specifiy page_size,
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standard `paginate_by` behavior should be used.
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"""
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request = factory.get('/')
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response = self.view(request).render()
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self.assertEqual(response.data['results'], self.data[:3])
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# Tests for context in pagination serializers
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class CustomField(serializers.Field):
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def to_native(self, value):
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if 'view' not in self.context:
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raise RuntimeError("context isn't getting passed into custom field")
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return "value"
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class BasicModelSerializer(serializers.Serializer):
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text = CustomField()
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def __init__(self, *args, **kwargs):
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super(BasicModelSerializer, self).__init__(*args, **kwargs)
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if 'view' not in self.context:
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raise RuntimeError("context isn't getting passed into serializer init")
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class TestContextPassedToCustomField(TestCase):
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def setUp(self):
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BasicModel.objects.create(text='ala ma kota')
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def test_with_pagination(self):
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class ListView(generics.ListCreateAPIView):
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model = BasicModel
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serializer_class = BasicModelSerializer
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paginate_by = 1
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self.view = ListView.as_view()
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request = factory.get('/')
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response = self.view(request).render()
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self.assertEqual(response.status_code, status.HTTP_200_OK)
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# Tests for custom pagination serializers
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class LinksSerializer(serializers.Serializer):
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next = pagination.NextPageField(source='*')
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prev = pagination.PreviousPageField(source='*')
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class CustomPaginationSerializer(pagination.BasePaginationSerializer):
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links = LinksSerializer(source='*') # Takes the page object as the source
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total_results = serializers.Field(source='paginator.count')
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results_field = 'objects'
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class TestCustomPaginationSerializer(TestCase):
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def setUp(self):
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objects = ['john', 'paul', 'george', 'ringo']
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paginator = Paginator(objects, 2)
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self.page = paginator.page(1)
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def test_custom_pagination_serializer(self):
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request = APIRequestFactory().get('/foobar')
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serializer = CustomPaginationSerializer(
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instance=self.page,
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context={'request': request}
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)
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expected = {
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'links': {
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'next': 'http://testserver/foobar?page=2',
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'prev': None
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},
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'total_results': 4,
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'objects': ['john', 'paul']
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}
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self.assertEqual(serializer.data, expected)
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class NonIntegerPage(object):
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def __init__(self, paginator, object_list, prev_token, token, next_token):
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self.paginator = paginator
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self.object_list = object_list
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self.prev_token = prev_token
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self.token = token
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self.next_token = next_token
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def has_next(self):
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return not not self.next_token
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def next_page_number(self):
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return self.next_token
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def has_previous(self):
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return not not self.prev_token
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def previous_page_number(self):
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return self.prev_token
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class NonIntegerPaginator(object):
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def __init__(self, object_list, per_page):
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self.object_list = object_list
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self.per_page = per_page
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def count(self):
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# pretend like we don't know how many pages we have
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return None
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def page(self, token=None):
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if token:
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try:
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first = self.object_list.index(token)
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except ValueError:
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first = 0
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else:
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first = 0
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n = len(self.object_list)
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last = min(first + self.per_page, n)
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prev_token = self.object_list[last - (2 * self.per_page)] if first else None
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next_token = self.object_list[last] if last < n else None
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return NonIntegerPage(self, self.object_list[first:last], prev_token, token, next_token)
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class TestNonIntegerPagination(TestCase):
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def test_custom_pagination_serializer(self):
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objects = ['john', 'paul', 'george', 'ringo']
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paginator = NonIntegerPaginator(objects, 2)
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request = APIRequestFactory().get('/foobar')
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serializer = CustomPaginationSerializer(
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instance=paginator.page(),
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context={'request': request}
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)
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expected = {
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'links': {
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'next': 'http://testserver/foobar?page={0}'.format(objects[2]),
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'prev': None
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},
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'total_results': None,
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'objects': objects[:2]
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}
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self.assertEqual(serializer.data, expected)
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request = APIRequestFactory().get('/foobar')
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serializer = CustomPaginationSerializer(
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instance=paginator.page('george'),
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context={'request': request}
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)
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expected = {
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'links': {
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'next': None,
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'prev': 'http://testserver/foobar?page={0}'.format(objects[0]),
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},
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'total_results': None,
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'objects': objects[2:]
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}
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self.assertEqual(serializer.data, expected)
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