733 lines
27 KiB
Python
733 lines
27 KiB
Python
# coding: utf-8
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from __future__ import unicode_literals
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import pytest
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from django.core.paginator import Paginator as DjangoPaginator
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from rest_framework import (
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exceptions, filters, generics, pagination, serializers, status
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)
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from rest_framework.pagination import PAGE_BREAK, PageLink
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from rest_framework.request import Request
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from rest_framework.test import APIRequestFactory
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factory = APIRequestFactory()
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class TestPaginationIntegration:
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"""
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Integration tests.
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"""
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def setup(self):
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class PassThroughSerializer(serializers.BaseSerializer):
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def to_representation(self, item):
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return item
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class EvenItemsOnly(filters.BaseFilterBackend):
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def filter_queryset(self, request, queryset, view):
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return [item for item in queryset if item % 2 == 0]
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class BasicPagination(pagination.PageNumberPagination):
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page_size = 5
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page_size_query_param = 'page_size'
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max_page_size = 20
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self.view = generics.ListAPIView.as_view(
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serializer_class=PassThroughSerializer,
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queryset=range(1, 101),
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filter_backends=[EvenItemsOnly],
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pagination_class=BasicPagination
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)
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def test_filtered_items_are_paginated(self):
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request = factory.get('/', {'page': 2})
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response = self.view(request)
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assert response.status_code == status.HTTP_200_OK
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assert response.data == {
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'results': [12, 14, 16, 18, 20],
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'previous': 'http://testserver/',
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'next': 'http://testserver/?page=3',
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'count': 50
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}
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def test_setting_page_size(self):
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"""
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When 'paginate_by_param' is set, the client may choose a page size.
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"""
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request = factory.get('/', {'page_size': 10})
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response = self.view(request)
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assert response.status_code == status.HTTP_200_OK
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assert response.data == {
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'results': [2, 4, 6, 8, 10, 12, 14, 16, 18, 20],
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'previous': None,
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'next': 'http://testserver/?page=2&page_size=10',
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'count': 50
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}
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def test_setting_page_size_over_maximum(self):
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"""
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When page_size parameter exceeds maxiumum allowable,
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then it should be capped to the maxiumum.
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"""
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request = factory.get('/', {'page_size': 1000})
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response = self.view(request)
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assert response.status_code == status.HTTP_200_OK
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assert response.data == {
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'results': [
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2, 4, 6, 8, 10, 12, 14, 16, 18, 20,
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22, 24, 26, 28, 30, 32, 34, 36, 38, 40
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],
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'previous': None,
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'next': 'http://testserver/?page=2&page_size=1000',
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'count': 50
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}
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def test_setting_page_size_to_zero(self):
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"""
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When page_size parameter is invalid it should return to the default.
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"""
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request = factory.get('/', {'page_size': 0})
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response = self.view(request)
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assert response.status_code == status.HTTP_200_OK
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assert response.data == {
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'results': [2, 4, 6, 8, 10],
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'previous': None,
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'next': 'http://testserver/?page=2&page_size=0',
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'count': 50
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}
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def test_additional_query_params_are_preserved(self):
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request = factory.get('/', {'page': 2, 'filter': 'even'})
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response = self.view(request)
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assert response.status_code == status.HTTP_200_OK
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assert response.data == {
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'results': [12, 14, 16, 18, 20],
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'previous': 'http://testserver/?filter=even',
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'next': 'http://testserver/?filter=even&page=3',
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'count': 50
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}
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def test_404_not_found_for_zero_page(self):
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request = factory.get('/', {'page': '0'})
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response = self.view(request)
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assert response.status_code == status.HTTP_404_NOT_FOUND
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assert response.data == {
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'detail': 'Invalid page "0": That page number is less than 1.'
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}
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def test_404_not_found_for_invalid_page(self):
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request = factory.get('/', {'page': 'invalid'})
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response = self.view(request)
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assert response.status_code == status.HTTP_404_NOT_FOUND
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assert response.data == {
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'detail': 'Invalid page "invalid": That page number is not an integer.'
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}
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class TestPaginationDisabledIntegration:
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"""
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Integration tests for disabled pagination.
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"""
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def setup(self):
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class PassThroughSerializer(serializers.BaseSerializer):
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def to_representation(self, item):
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return item
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self.view = generics.ListAPIView.as_view(
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serializer_class=PassThroughSerializer,
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queryset=range(1, 101),
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pagination_class=None
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)
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def test_unpaginated_list(self):
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request = factory.get('/', {'page': 2})
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response = self.view(request)
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assert response.status_code == status.HTTP_200_OK
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assert response.data == list(range(1, 101))
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class TestPageNumberPagination:
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"""
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Unit tests for `pagination.PageNumberPagination`.
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"""
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def setup(self):
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class ExamplePagination(pagination.PageNumberPagination):
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page_size = 5
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self.pagination = ExamplePagination()
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self.queryset = range(1, 101)
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def paginate_queryset(self, request):
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return list(self.pagination.paginate_queryset(self.queryset, request))
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def get_paginated_content(self, queryset):
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response = self.pagination.get_paginated_response(queryset)
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return response.data
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def get_html_context(self):
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return self.pagination.get_html_context()
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def test_no_page_number(self):
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request = Request(factory.get('/'))
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queryset = self.paginate_queryset(request)
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content = self.get_paginated_content(queryset)
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context = self.get_html_context()
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assert queryset == [1, 2, 3, 4, 5]
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assert content == {
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'results': [1, 2, 3, 4, 5],
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'previous': None,
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'next': 'http://testserver/?page=2',
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'count': 100
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}
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assert context == {
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'previous_url': None,
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'next_url': 'http://testserver/?page=2',
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'page_links': [
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PageLink('http://testserver/', 1, True, False),
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PageLink('http://testserver/?page=2', 2, False, False),
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PageLink('http://testserver/?page=3', 3, False, False),
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PAGE_BREAK,
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PageLink('http://testserver/?page=20', 20, False, False),
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]
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}
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assert self.pagination.display_page_controls
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assert isinstance(self.pagination.to_html(), type(''))
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def test_second_page(self):
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request = Request(factory.get('/', {'page': 2}))
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queryset = self.paginate_queryset(request)
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content = self.get_paginated_content(queryset)
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context = self.get_html_context()
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assert queryset == [6, 7, 8, 9, 10]
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assert content == {
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'results': [6, 7, 8, 9, 10],
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'previous': 'http://testserver/',
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'next': 'http://testserver/?page=3',
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'count': 100
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}
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assert context == {
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'previous_url': 'http://testserver/',
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'next_url': 'http://testserver/?page=3',
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'page_links': [
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PageLink('http://testserver/', 1, False, False),
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PageLink('http://testserver/?page=2', 2, True, False),
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PageLink('http://testserver/?page=3', 3, False, False),
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PAGE_BREAK,
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PageLink('http://testserver/?page=20', 20, False, False),
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]
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}
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def test_last_page(self):
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request = Request(factory.get('/', {'page': 'last'}))
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queryset = self.paginate_queryset(request)
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content = self.get_paginated_content(queryset)
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context = self.get_html_context()
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assert queryset == [96, 97, 98, 99, 100]
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assert content == {
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'results': [96, 97, 98, 99, 100],
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'previous': 'http://testserver/?page=19',
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'next': None,
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'count': 100
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}
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assert context == {
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'previous_url': 'http://testserver/?page=19',
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'next_url': None,
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'page_links': [
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PageLink('http://testserver/', 1, False, False),
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PAGE_BREAK,
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PageLink('http://testserver/?page=18', 18, False, False),
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PageLink('http://testserver/?page=19', 19, False, False),
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PageLink('http://testserver/?page=20', 20, True, False),
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]
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}
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def test_invalid_page(self):
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request = Request(factory.get('/', {'page': 'invalid'}))
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with pytest.raises(exceptions.NotFound):
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self.paginate_queryset(request)
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class TestPageNumberPaginationOverride:
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"""
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Unit tests for `pagination.PageNumberPagination`.
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the Django Paginator Class is overridden.
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"""
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def setup(self):
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class OverriddenDjangoPaginator(DjangoPaginator):
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# override the count in our overriden Django Paginator
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# we will only return one page, with one item
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count = 1
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class ExamplePagination(pagination.PageNumberPagination):
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django_paginator_class = OverriddenDjangoPaginator
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page_size = 5
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self.pagination = ExamplePagination()
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self.queryset = range(1, 101)
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def paginate_queryset(self, request):
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return list(self.pagination.paginate_queryset(self.queryset, request))
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def get_paginated_content(self, queryset):
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response = self.pagination.get_paginated_response(queryset)
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return response.data
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def get_html_context(self):
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return self.pagination.get_html_context()
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def test_no_page_number(self):
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request = Request(factory.get('/'))
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queryset = self.paginate_queryset(request)
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content = self.get_paginated_content(queryset)
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context = self.get_html_context()
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assert queryset == [1]
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assert content == {
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'results': [1, ],
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'previous': None,
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'next': None,
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'count': 1
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}
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assert context == {
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'previous_url': None,
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'next_url': None,
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'page_links': [
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PageLink('http://testserver/', 1, True, False),
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]
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}
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assert not self.pagination.display_page_controls
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assert isinstance(self.pagination.to_html(), type(''))
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def test_invalid_page(self):
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request = Request(factory.get('/', {'page': 'invalid'}))
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with pytest.raises(exceptions.NotFound):
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self.paginate_queryset(request)
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class TestLimitOffset:
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"""
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Unit tests for `pagination.LimitOffsetPagination`.
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"""
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def setup(self):
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class ExamplePagination(pagination.LimitOffsetPagination):
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default_limit = 10
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max_limit = 15
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self.pagination = ExamplePagination()
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self.queryset = range(1, 101)
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def paginate_queryset(self, request):
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return list(self.pagination.paginate_queryset(self.queryset, request))
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def get_paginated_content(self, queryset):
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response = self.pagination.get_paginated_response(queryset)
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return response.data
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def get_html_context(self):
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return self.pagination.get_html_context()
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def test_no_offset(self):
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request = Request(factory.get('/', {'limit': 5}))
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queryset = self.paginate_queryset(request)
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content = self.get_paginated_content(queryset)
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context = self.get_html_context()
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assert queryset == [1, 2, 3, 4, 5]
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assert content == {
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'results': [1, 2, 3, 4, 5],
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'previous': None,
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'next': 'http://testserver/?limit=5&offset=5',
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'count': 100
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}
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assert context == {
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'previous_url': None,
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'next_url': 'http://testserver/?limit=5&offset=5',
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'page_links': [
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PageLink('http://testserver/?limit=5', 1, True, False),
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PageLink('http://testserver/?limit=5&offset=5', 2, False, False),
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PageLink('http://testserver/?limit=5&offset=10', 3, False, False),
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PAGE_BREAK,
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PageLink('http://testserver/?limit=5&offset=95', 20, False, False),
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]
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}
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assert self.pagination.display_page_controls
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assert isinstance(self.pagination.to_html(), type(''))
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def test_single_offset(self):
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"""
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When the offset is not a multiple of the limit we get some edge cases:
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* The first page should still be offset zero.
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* We may end up displaying an extra page in the pagination control.
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"""
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request = Request(factory.get('/', {'limit': 5, 'offset': 1}))
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queryset = self.paginate_queryset(request)
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content = self.get_paginated_content(queryset)
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context = self.get_html_context()
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assert queryset == [2, 3, 4, 5, 6]
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assert content == {
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'results': [2, 3, 4, 5, 6],
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'previous': 'http://testserver/?limit=5',
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'next': 'http://testserver/?limit=5&offset=6',
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'count': 100
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}
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assert context == {
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'previous_url': 'http://testserver/?limit=5',
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'next_url': 'http://testserver/?limit=5&offset=6',
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'page_links': [
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PageLink('http://testserver/?limit=5', 1, False, False),
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PageLink('http://testserver/?limit=5&offset=1', 2, True, False),
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PageLink('http://testserver/?limit=5&offset=6', 3, False, False),
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PAGE_BREAK,
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PageLink('http://testserver/?limit=5&offset=96', 21, False, False),
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]
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}
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def test_first_offset(self):
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request = Request(factory.get('/', {'limit': 5, 'offset': 5}))
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queryset = self.paginate_queryset(request)
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content = self.get_paginated_content(queryset)
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context = self.get_html_context()
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assert queryset == [6, 7, 8, 9, 10]
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assert content == {
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'results': [6, 7, 8, 9, 10],
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'previous': 'http://testserver/?limit=5',
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'next': 'http://testserver/?limit=5&offset=10',
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'count': 100
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}
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assert context == {
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'previous_url': 'http://testserver/?limit=5',
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'next_url': 'http://testserver/?limit=5&offset=10',
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'page_links': [
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PageLink('http://testserver/?limit=5', 1, False, False),
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PageLink('http://testserver/?limit=5&offset=5', 2, True, False),
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PageLink('http://testserver/?limit=5&offset=10', 3, False, False),
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PAGE_BREAK,
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PageLink('http://testserver/?limit=5&offset=95', 20, False, False),
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]
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}
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def test_middle_offset(self):
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request = Request(factory.get('/', {'limit': 5, 'offset': 10}))
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queryset = self.paginate_queryset(request)
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content = self.get_paginated_content(queryset)
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context = self.get_html_context()
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assert queryset == [11, 12, 13, 14, 15]
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assert content == {
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'results': [11, 12, 13, 14, 15],
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'previous': 'http://testserver/?limit=5&offset=5',
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'next': 'http://testserver/?limit=5&offset=15',
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'count': 100
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}
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assert context == {
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'previous_url': 'http://testserver/?limit=5&offset=5',
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'next_url': 'http://testserver/?limit=5&offset=15',
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'page_links': [
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PageLink('http://testserver/?limit=5', 1, False, False),
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PageLink('http://testserver/?limit=5&offset=5', 2, False, False),
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PageLink('http://testserver/?limit=5&offset=10', 3, True, False),
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PageLink('http://testserver/?limit=5&offset=15', 4, False, False),
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PAGE_BREAK,
|
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PageLink('http://testserver/?limit=5&offset=95', 20, False, False),
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]
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}
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def test_ending_offset(self):
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request = Request(factory.get('/', {'limit': 5, 'offset': 95}))
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queryset = self.paginate_queryset(request)
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content = self.get_paginated_content(queryset)
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context = self.get_html_context()
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assert queryset == [96, 97, 98, 99, 100]
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assert content == {
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'results': [96, 97, 98, 99, 100],
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'previous': 'http://testserver/?limit=5&offset=90',
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'next': None,
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'count': 100
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}
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|
assert context == {
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'previous_url': 'http://testserver/?limit=5&offset=90',
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'next_url': None,
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'page_links': [
|
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PageLink('http://testserver/?limit=5', 1, False, False),
|
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PAGE_BREAK,
|
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PageLink('http://testserver/?limit=5&offset=85', 18, False, False),
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PageLink('http://testserver/?limit=5&offset=90', 19, False, False),
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PageLink('http://testserver/?limit=5&offset=95', 20, True, False),
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]
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}
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def test_erronous_offset(self):
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request = Request(factory.get('/', {'limit': 5, 'offset': 1000}))
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queryset = self.paginate_queryset(request)
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self.get_paginated_content(queryset)
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self.get_html_context()
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|
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def test_invalid_offset(self):
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"""
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|
An invalid offset query param should be treated as 0.
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|
"""
|
|
request = Request(factory.get('/', {'limit': 5, 'offset': 'invalid'}))
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queryset = self.paginate_queryset(request)
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assert queryset == [1, 2, 3, 4, 5]
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|
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def test_invalid_limit(self):
|
|
"""
|
|
An invalid limit query param should be ignored in favor of the default.
|
|
"""
|
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request = Request(factory.get('/', {'limit': 'invalid', 'offset': 0}))
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queryset = self.paginate_queryset(request)
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content = self.get_paginated_content(queryset)
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next_limit = self.pagination.default_limit
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next_offset = self.pagination.default_limit
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next_url = 'http://testserver/?limit={0}&offset={1}'.format(next_limit, next_offset)
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assert queryset == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
|
|
assert content.get('next') == next_url
|
|
|
|
def test_max_limit(self):
|
|
"""
|
|
The limit defaults to the max_limit when there is a max_limit and the
|
|
requested limit is greater than the max_limit
|
|
"""
|
|
offset = 50
|
|
request = Request(factory.get('/', {'limit': '11235', 'offset': offset}))
|
|
queryset = self.paginate_queryset(request)
|
|
content = self.get_paginated_content(queryset)
|
|
max_limit = self.pagination.max_limit
|
|
next_offset = offset + max_limit
|
|
prev_offset = offset - max_limit
|
|
base_url = 'http://testserver/?limit={0}'.format(max_limit)
|
|
next_url = base_url + '&offset={0}'.format(next_offset)
|
|
prev_url = base_url + '&offset={0}'.format(prev_offset)
|
|
assert queryset == list(range(51, 66))
|
|
assert content.get('next') == next_url
|
|
assert content.get('previous') == prev_url
|
|
|
|
|
|
class TestCursorPagination:
|
|
"""
|
|
Unit tests for `pagination.CursorPagination`.
|
|
"""
|
|
|
|
def setup(self):
|
|
class MockObject(object):
|
|
def __init__(self, idx):
|
|
self.created = idx
|
|
|
|
class MockQuerySet(object):
|
|
def __init__(self, items):
|
|
self.items = items
|
|
|
|
def filter(self, created__gt=None, created__lt=None):
|
|
if created__gt is not None:
|
|
return MockQuerySet([
|
|
item for item in self.items
|
|
if item.created > int(created__gt)
|
|
])
|
|
|
|
assert created__lt is not None
|
|
return MockQuerySet([
|
|
item for item in self.items
|
|
if item.created < int(created__lt)
|
|
])
|
|
|
|
def order_by(self, *ordering):
|
|
if ordering[0].startswith('-'):
|
|
return MockQuerySet(list(reversed(self.items)))
|
|
return self
|
|
|
|
def __getitem__(self, sliced):
|
|
return self.items[sliced]
|
|
|
|
class ExamplePagination(pagination.CursorPagination):
|
|
page_size = 5
|
|
ordering = 'created'
|
|
|
|
self.pagination = ExamplePagination()
|
|
self.queryset = MockQuerySet([
|
|
MockObject(idx) for idx in [
|
|
1, 1, 1, 1, 1,
|
|
1, 2, 3, 4, 4,
|
|
4, 4, 5, 6, 7,
|
|
7, 7, 7, 7, 7,
|
|
7, 7, 7, 8, 9,
|
|
9, 9, 9, 9, 9
|
|
]
|
|
])
|
|
|
|
def get_pages(self, url):
|
|
"""
|
|
Given a URL return a tuple of:
|
|
|
|
(previous page, current page, next page, previous url, next url)
|
|
"""
|
|
request = Request(factory.get(url))
|
|
queryset = self.pagination.paginate_queryset(self.queryset, request)
|
|
current = [item.created for item in queryset]
|
|
|
|
next_url = self.pagination.get_next_link()
|
|
previous_url = self.pagination.get_previous_link()
|
|
|
|
if next_url is not None:
|
|
request = Request(factory.get(next_url))
|
|
queryset = self.pagination.paginate_queryset(self.queryset, request)
|
|
next = [item.created for item in queryset]
|
|
else:
|
|
next = None
|
|
|
|
if previous_url is not None:
|
|
request = Request(factory.get(previous_url))
|
|
queryset = self.pagination.paginate_queryset(self.queryset, request)
|
|
previous = [item.created for item in queryset]
|
|
else:
|
|
previous = None
|
|
|
|
return (previous, current, next, previous_url, next_url)
|
|
|
|
def test_invalid_cursor(self):
|
|
request = Request(factory.get('/', {'cursor': '123'}))
|
|
with pytest.raises(exceptions.NotFound):
|
|
self.pagination.paginate_queryset(self.queryset, request)
|
|
|
|
def test_use_with_ordering_filter(self):
|
|
class MockView:
|
|
filter_backends = (filters.OrderingFilter,)
|
|
ordering_fields = ['username', 'created']
|
|
ordering = 'created'
|
|
|
|
request = Request(factory.get('/', {'ordering': 'username'}))
|
|
ordering = self.pagination.get_ordering(request, [], MockView())
|
|
assert ordering == ('username',)
|
|
|
|
request = Request(factory.get('/', {'ordering': '-username'}))
|
|
ordering = self.pagination.get_ordering(request, [], MockView())
|
|
assert ordering == ('-username',)
|
|
|
|
request = Request(factory.get('/', {'ordering': 'invalid'}))
|
|
ordering = self.pagination.get_ordering(request, [], MockView())
|
|
assert ordering == ('created',)
|
|
|
|
def test_cursor_pagination(self):
|
|
(previous, current, next, previous_url, next_url) = self.get_pages('/')
|
|
|
|
assert previous is None
|
|
assert current == [1, 1, 1, 1, 1]
|
|
assert next == [1, 2, 3, 4, 4]
|
|
|
|
(previous, current, next, previous_url, next_url) = self.get_pages(next_url)
|
|
|
|
assert previous == [1, 1, 1, 1, 1]
|
|
assert current == [1, 2, 3, 4, 4]
|
|
assert next == [4, 4, 5, 6, 7]
|
|
|
|
(previous, current, next, previous_url, next_url) = self.get_pages(next_url)
|
|
|
|
assert previous == [1, 2, 3, 4, 4]
|
|
assert current == [4, 4, 5, 6, 7]
|
|
assert next == [7, 7, 7, 7, 7]
|
|
|
|
(previous, current, next, previous_url, next_url) = self.get_pages(next_url)
|
|
|
|
assert previous == [4, 4, 4, 5, 6] # Paging artifact
|
|
assert current == [7, 7, 7, 7, 7]
|
|
assert next == [7, 7, 7, 8, 9]
|
|
|
|
(previous, current, next, previous_url, next_url) = self.get_pages(next_url)
|
|
|
|
assert previous == [7, 7, 7, 7, 7]
|
|
assert current == [7, 7, 7, 8, 9]
|
|
assert next == [9, 9, 9, 9, 9]
|
|
|
|
(previous, current, next, previous_url, next_url) = self.get_pages(next_url)
|
|
|
|
assert previous == [7, 7, 7, 8, 9]
|
|
assert current == [9, 9, 9, 9, 9]
|
|
assert next is None
|
|
|
|
(previous, current, next, previous_url, next_url) = self.get_pages(previous_url)
|
|
|
|
assert previous == [7, 7, 7, 7, 7]
|
|
assert current == [7, 7, 7, 8, 9]
|
|
assert next == [9, 9, 9, 9, 9]
|
|
|
|
(previous, current, next, previous_url, next_url) = self.get_pages(previous_url)
|
|
|
|
assert previous == [4, 4, 5, 6, 7]
|
|
assert current == [7, 7, 7, 7, 7]
|
|
assert next == [8, 9, 9, 9, 9] # Paging artifact
|
|
|
|
(previous, current, next, previous_url, next_url) = self.get_pages(previous_url)
|
|
|
|
assert previous == [1, 2, 3, 4, 4]
|
|
assert current == [4, 4, 5, 6, 7]
|
|
assert next == [7, 7, 7, 7, 7]
|
|
|
|
(previous, current, next, previous_url, next_url) = self.get_pages(previous_url)
|
|
|
|
assert previous == [1, 1, 1, 1, 1]
|
|
assert current == [1, 2, 3, 4, 4]
|
|
assert next == [4, 4, 5, 6, 7]
|
|
|
|
(previous, current, next, previous_url, next_url) = self.get_pages(previous_url)
|
|
|
|
assert previous is None
|
|
assert current == [1, 1, 1, 1, 1]
|
|
assert next == [1, 2, 3, 4, 4]
|
|
|
|
assert isinstance(self.pagination.to_html(), type(''))
|
|
|
|
|
|
def test_get_displayed_page_numbers():
|
|
"""
|
|
Test our contextual page display function.
|
|
|
|
This determines which pages to display in a pagination control,
|
|
given the current page and the last page.
|
|
"""
|
|
displayed_page_numbers = pagination._get_displayed_page_numbers
|
|
|
|
# At five pages or less, all pages are displayed, always.
|
|
assert displayed_page_numbers(1, 5) == [1, 2, 3, 4, 5]
|
|
assert displayed_page_numbers(2, 5) == [1, 2, 3, 4, 5]
|
|
assert displayed_page_numbers(3, 5) == [1, 2, 3, 4, 5]
|
|
assert displayed_page_numbers(4, 5) == [1, 2, 3, 4, 5]
|
|
assert displayed_page_numbers(5, 5) == [1, 2, 3, 4, 5]
|
|
|
|
# Between six and either pages we may have a single page break.
|
|
assert displayed_page_numbers(1, 6) == [1, 2, 3, None, 6]
|
|
assert displayed_page_numbers(2, 6) == [1, 2, 3, None, 6]
|
|
assert displayed_page_numbers(3, 6) == [1, 2, 3, 4, 5, 6]
|
|
assert displayed_page_numbers(4, 6) == [1, 2, 3, 4, 5, 6]
|
|
assert displayed_page_numbers(5, 6) == [1, None, 4, 5, 6]
|
|
assert displayed_page_numbers(6, 6) == [1, None, 4, 5, 6]
|
|
|
|
assert displayed_page_numbers(1, 7) == [1, 2, 3, None, 7]
|
|
assert displayed_page_numbers(2, 7) == [1, 2, 3, None, 7]
|
|
assert displayed_page_numbers(3, 7) == [1, 2, 3, 4, None, 7]
|
|
assert displayed_page_numbers(4, 7) == [1, 2, 3, 4, 5, 6, 7]
|
|
assert displayed_page_numbers(5, 7) == [1, None, 4, 5, 6, 7]
|
|
assert displayed_page_numbers(6, 7) == [1, None, 5, 6, 7]
|
|
assert displayed_page_numbers(7, 7) == [1, None, 5, 6, 7]
|
|
|
|
assert displayed_page_numbers(1, 8) == [1, 2, 3, None, 8]
|
|
assert displayed_page_numbers(2, 8) == [1, 2, 3, None, 8]
|
|
assert displayed_page_numbers(3, 8) == [1, 2, 3, 4, None, 8]
|
|
assert displayed_page_numbers(4, 8) == [1, 2, 3, 4, 5, None, 8]
|
|
assert displayed_page_numbers(5, 8) == [1, None, 4, 5, 6, 7, 8]
|
|
assert displayed_page_numbers(6, 8) == [1, None, 5, 6, 7, 8]
|
|
assert displayed_page_numbers(7, 8) == [1, None, 6, 7, 8]
|
|
assert displayed_page_numbers(8, 8) == [1, None, 6, 7, 8]
|
|
|
|
# At nine or more pages we may have two page breaks, one on each side.
|
|
assert displayed_page_numbers(1, 9) == [1, 2, 3, None, 9]
|
|
assert displayed_page_numbers(2, 9) == [1, 2, 3, None, 9]
|
|
assert displayed_page_numbers(3, 9) == [1, 2, 3, 4, None, 9]
|
|
assert displayed_page_numbers(4, 9) == [1, 2, 3, 4, 5, None, 9]
|
|
assert displayed_page_numbers(5, 9) == [1, None, 4, 5, 6, None, 9]
|
|
assert displayed_page_numbers(6, 9) == [1, None, 5, 6, 7, 8, 9]
|
|
assert displayed_page_numbers(7, 9) == [1, None, 6, 7, 8, 9]
|
|
assert displayed_page_numbers(8, 9) == [1, None, 7, 8, 9]
|
|
assert displayed_page_numbers(9, 9) == [1, None, 7, 8, 9]
|