增加通用分页函数和对应的测试

utils/tests.py

@@ -0,0 +1,64 @@
+# coding=utf-8
+from rest_framework.test import APIClient, APITestCase
+from rest_framework import serializers
+from rest_framework.decorators import api_view
+
+from account.models import User
+from .shortcuts import paginate
+
+
+class PaginationTestSerialiser(serializers.Serializer):
+    username = serializers.CharField(max_length=100)
+
+
+@api_view(["GET"])
+def pagination_test_func(request):
+    return paginate(request, User.objects.all(), PaginationTestSerialiser)
+
+
+class PaginatorTest(APITestCase):
+    urls = "utils.test_urls"
+
+    def setUp(self):
+        self.client = APIClient()
+        self.url = "/paginate_test/"
+        User.objects.create(username="test1")
+        User.objects.create(username="test2")
+
+    def test_no_paginate(self):
+        response = self.client.get(self.url)
+        self.assertEqual(response.data["code"], 0)
+        self.assertNotIn("next_page", response.data["data"])
+        self.assertNotIn("previous_page", response.data["data"])
+
+    def test_error_parameter(self):
+        response = self.client.get(self.url + "?paging=true")
+        self.assertEqual(response.data, {"code": 1, "data": u"参数错误"})
+
+        response = self.client.get(self.url + "?paging=true&limit=-1")
+        self.assertEqual(response.data, {"code": 1, "data": u"参数错误"})
+
+        response = self.client.get(self.url + "?paging=true&limit=aa")
+        self.assertEqual(response.data, {"code": 1, "data": u"参数错误"})
+
+        response = self.client.get(self.url + "?paging=true&limit=1&page_size=1&page=-1")
+        self.assertEqual(response.data, {"code": 1, "data": u"参数错误"})
+
+        response = self.client.get(self.url + "?paging=true&limit=1&page_size=aaa&page=1")
+        self.assertEqual(response.data, {"code": 1, "data": u"参数错误"})
+
+        response = self.client.get(self.url + "?paging=true&limit=1&page_size=1&page=aaa")
+        self.assertEqual(response.data, {"code": 1, "data": u"参数错误"})
+
+    def test_correct_paginate(self):
+        response = self.client.get(self.url + "?paging=true&limit=1&page_size=1&page=1")
+        self.assertEqual(response.data["code"], 0)
+        self.assertEqual(response.data["data"]["previous_page"], None)
+        self.assertEqual(response.data["data"]["next_page"], 2)
+        self.assertEqual(len(response.data["data"]["results"]), 1)
+
+        response = self.client.get(self.url + "?paging=true&limit=1&page_size=2&page=1")
+        self.assertEqual(response.data["code"], 0)
+        self.assertEqual(response.data["data"]["previous_page"], None)
+        self.assertEqual(response.data["data"]["next_page"], None)
+        self.assertEqual(len(response.data["data"]["results"]), 2)