488 lines
17 KiB
Python
488 lines
17 KiB
Python
from __future__ import absolute_import, unicode_literals
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# -*- coding: utf-8 -*-
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import json
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from datetime import datetime
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from xml.dom import minidom
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from django.conf import settings
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from django.core import serializers
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from django.db import transaction, connection
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from django.test import TestCase, TransactionTestCase, Approximate
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from django.utils import six
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from django.utils.six import StringIO
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from django.utils import unittest
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from .models import (Category, Author, Article, AuthorProfile, Actor, Movie,
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Score, Player, Team)
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class SerializerRegistrationTests(unittest.TestCase):
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def setUp(self):
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self.old_SERIALIZATION_MODULES = getattr(settings, 'SERIALIZATION_MODULES', None)
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self.old_serializers = serializers._serializers
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serializers._serializers = {}
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settings.SERIALIZATION_MODULES = {
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"json2" : "django.core.serializers.json",
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}
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def tearDown(self):
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serializers._serializers = self.old_serializers
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if self.old_SERIALIZATION_MODULES:
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settings.SERIALIZATION_MODULES = self.old_SERIALIZATION_MODULES
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else:
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delattr(settings, 'SERIALIZATION_MODULES')
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def test_register(self):
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"Registering a new serializer populates the full registry. Refs #14823"
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serializers.register_serializer('json3', 'django.core.serializers.json')
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public_formats = serializers.get_public_serializer_formats()
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self.assertIn('json3', public_formats)
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self.assertIn('json2', public_formats)
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self.assertIn('xml', public_formats)
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def test_unregister(self):
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"Unregistering a serializer doesn't cause the registry to be repopulated. Refs #14823"
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serializers.unregister_serializer('xml')
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serializers.register_serializer('json3', 'django.core.serializers.json')
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public_formats = serializers.get_public_serializer_formats()
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self.assertNotIn('xml', public_formats)
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self.assertIn('json3', public_formats)
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def test_builtin_serializers(self):
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"Requesting a list of serializer formats popuates the registry"
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all_formats = set(serializers.get_serializer_formats())
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public_formats = set(serializers.get_public_serializer_formats())
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self.assertIn('xml', all_formats),
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self.assertIn('xml', public_formats)
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self.assertIn('json2', all_formats)
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self.assertIn('json2', public_formats)
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self.assertIn('python', all_formats)
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self.assertNotIn('python', public_formats)
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class SerializersTestBase(object):
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@staticmethod
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def _comparison_value(value):
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return value
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def setUp(self):
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sports = Category.objects.create(name="Sports")
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music = Category.objects.create(name="Music")
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op_ed = Category.objects.create(name="Op-Ed")
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self.joe = Author.objects.create(name="Joe")
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self.jane = Author.objects.create(name="Jane")
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self.a1 = Article(
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author=self.jane,
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headline="Poker has no place on ESPN",
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pub_date=datetime(2006, 6, 16, 11, 00)
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)
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self.a1.save()
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self.a1.categories = [sports, op_ed]
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self.a2 = Article(
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author=self.joe,
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headline="Time to reform copyright",
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pub_date=datetime(2006, 6, 16, 13, 00, 11, 345)
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)
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self.a2.save()
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self.a2.categories = [music, op_ed]
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def test_serialize(self):
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"""Tests that basic serialization works."""
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serial_str = serializers.serialize(self.serializer_name,
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Article.objects.all())
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self.assertTrue(self._validate_output(serial_str))
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def test_serializer_roundtrip(self):
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"""Tests that serialized content can be deserialized."""
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serial_str = serializers.serialize(self.serializer_name,
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Article.objects.all())
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models = list(serializers.deserialize(self.serializer_name, serial_str))
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self.assertEqual(len(models), 2)
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def test_altering_serialized_output(self):
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"""
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Tests the ability to create new objects by
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modifying serialized content.
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"""
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old_headline = b"Poker has no place on ESPN"
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new_headline = b"Poker has no place on television"
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serial_str = serializers.serialize(self.serializer_name,
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Article.objects.all())
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serial_str = serial_str.replace(old_headline, new_headline)
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models = list(serializers.deserialize(self.serializer_name, serial_str))
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# Prior to saving, old headline is in place
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self.assertTrue(Article.objects.filter(headline=old_headline))
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self.assertFalse(Article.objects.filter(headline=new_headline))
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for model in models:
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model.save()
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# After saving, new headline is in place
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self.assertTrue(Article.objects.filter(headline=new_headline))
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self.assertFalse(Article.objects.filter(headline=old_headline))
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def test_one_to_one_as_pk(self):
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"""
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Tests that if you use your own primary key field
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(such as a OneToOneField), it doesn't appear in the
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serialized field list - it replaces the pk identifier.
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"""
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profile = AuthorProfile(author=self.joe,
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date_of_birth=datetime(1970,1,1))
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profile.save()
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serial_str = serializers.serialize(self.serializer_name,
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AuthorProfile.objects.all())
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self.assertFalse(self._get_field_values(serial_str, 'author'))
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for obj in serializers.deserialize(self.serializer_name, serial_str):
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self.assertEqual(obj.object.pk, self._comparison_value(self.joe.pk))
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def test_serialize_field_subset(self):
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"""Tests that output can be restricted to a subset of fields"""
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valid_fields = ('headline','pub_date')
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invalid_fields = ("author", "categories")
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serial_str = serializers.serialize(self.serializer_name,
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Article.objects.all(),
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fields=valid_fields)
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for field_name in invalid_fields:
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self.assertFalse(self._get_field_values(serial_str, field_name))
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for field_name in valid_fields:
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self.assertTrue(self._get_field_values(serial_str, field_name))
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def test_serialize_unicode(self):
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"""Tests that unicode makes the roundtrip intact"""
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actor_name = "Za\u017c\u00f3\u0142\u0107"
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movie_title = 'G\u0119\u015bl\u0105 ja\u017a\u0144'
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ac = Actor(name=actor_name)
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mv = Movie(title=movie_title, actor=ac)
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ac.save()
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mv.save()
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serial_str = serializers.serialize(self.serializer_name, [mv])
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self.assertEqual(self._get_field_values(serial_str, "title")[0], movie_title)
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self.assertEqual(self._get_field_values(serial_str, "actor")[0], actor_name)
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obj_list = list(serializers.deserialize(self.serializer_name, serial_str))
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mv_obj = obj_list[0].object
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self.assertEqual(mv_obj.title, movie_title)
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def test_serialize_superfluous_queries(self):
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"""Ensure no superfluous queries are made when serializing ForeignKeys
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#17602
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"""
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ac = Actor(name='Actor name')
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ac.save()
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mv = Movie(title='Movie title', actor_id=ac.pk)
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mv.save()
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with self.assertNumQueries(0):
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serial_str = serializers.serialize(self.serializer_name, [mv])
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def test_serialize_with_null_pk(self):
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"""
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Tests that serialized data with no primary key results
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in a model instance with no id
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"""
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category = Category(name="Reference")
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serial_str = serializers.serialize(self.serializer_name, [category])
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pk_value = self._get_pk_values(serial_str)[0]
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self.assertFalse(pk_value)
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cat_obj = list(serializers.deserialize(self.serializer_name,
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serial_str))[0].object
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self.assertEqual(cat_obj.id, None)
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def test_float_serialization(self):
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"""Tests that float values serialize and deserialize intact"""
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sc = Score(score=3.4)
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sc.save()
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serial_str = serializers.serialize(self.serializer_name, [sc])
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deserial_objs = list(serializers.deserialize(self.serializer_name,
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serial_str))
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self.assertEqual(deserial_objs[0].object.score, Approximate(3.4, places=1))
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def test_custom_field_serialization(self):
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"""Tests that custom fields serialize and deserialize intact"""
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team_str = "Spartak Moskva"
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player = Player()
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player.name = "Soslan Djanaev"
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player.rank = 1
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player.team = Team(team_str)
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player.save()
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serial_str = serializers.serialize(self.serializer_name,
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Player.objects.all())
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team = self._get_field_values(serial_str, "team")
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self.assertTrue(team)
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self.assertEqual(team[0], team_str)
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deserial_objs = list(serializers.deserialize(self.serializer_name, serial_str))
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self.assertEqual(deserial_objs[0].object.team.to_string(),
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player.team.to_string())
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def test_pre_1000ad_date(self):
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"""Tests that year values before 1000AD are properly formatted"""
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# Regression for #12524 -- dates before 1000AD get prefixed
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# 0's on the year
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a = Article.objects.create(
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author = self.jane,
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headline = "Nobody remembers the early years",
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pub_date = datetime(1, 2, 3, 4, 5, 6))
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serial_str = serializers.serialize(self.serializer_name, [a])
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date_values = self._get_field_values(serial_str, "pub_date")
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self.assertEqual(date_values[0].replace('T', ' '), "0001-02-03 04:05:06")
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def test_pkless_serialized_strings(self):
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"""
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Tests that serialized strings without PKs
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can be turned into models
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"""
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deserial_objs = list(serializers.deserialize(self.serializer_name,
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self.pkless_str))
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for obj in deserial_objs:
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self.assertFalse(obj.object.id)
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obj.save()
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self.assertEqual(Category.objects.all().count(), 4)
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class SerializersTransactionTestBase(object):
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def test_forward_refs(self):
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"""
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Tests that objects ids can be referenced before they are
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defined in the serialization data.
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"""
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# The deserialization process needs to be contained
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# within a transaction in order to test forward reference
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# handling.
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transaction.enter_transaction_management()
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transaction.managed(True)
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objs = serializers.deserialize(self.serializer_name, self.fwd_ref_str)
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with connection.constraint_checks_disabled():
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for obj in objs:
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obj.save()
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transaction.commit()
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transaction.leave_transaction_management()
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for model_cls in (Category, Author, Article):
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self.assertEqual(model_cls.objects.all().count(), 1)
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art_obj = Article.objects.all()[0]
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self.assertEqual(art_obj.categories.all().count(), 1)
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self.assertEqual(art_obj.author.name, "Agnes")
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class XmlSerializerTestCase(SerializersTestBase, TestCase):
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serializer_name = "xml"
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pkless_str = b"""<?xml version="1.0" encoding="utf-8"?>
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<django-objects version="1.0">
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<object model="serializers.category">
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<field type="CharField" name="name">Reference</field>
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</object>
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</django-objects>"""
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@staticmethod
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def _comparison_value(value):
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# The XML serializer handles everything as strings, so comparisons
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# need to be performed on the stringified value
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return six.text_type(value)
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@staticmethod
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def _validate_output(serial_str):
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try:
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minidom.parseString(serial_str)
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except Exception:
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return False
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else:
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return True
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@staticmethod
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def _get_pk_values(serial_str):
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ret_list = []
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dom = minidom.parseString(serial_str)
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fields = dom.getElementsByTagName("object")
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for field in fields:
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ret_list.append(field.getAttribute("pk"))
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return ret_list
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@staticmethod
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def _get_field_values(serial_str, field_name):
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ret_list = []
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dom = minidom.parseString(serial_str)
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fields = dom.getElementsByTagName("field")
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for field in fields:
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if field.getAttribute("name") == field_name:
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temp = []
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for child in field.childNodes:
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temp.append(child.nodeValue)
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ret_list.append("".join(temp))
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return ret_list
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class XmlSerializerTransactionTestCase(SerializersTransactionTestBase, TransactionTestCase):
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serializer_name = "xml"
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fwd_ref_str = b"""<?xml version="1.0" encoding="utf-8"?>
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<django-objects version="1.0">
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<object pk="1" model="serializers.article">
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<field to="serializers.author" name="author" rel="ManyToOneRel">1</field>
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<field type="CharField" name="headline">Forward references pose no problem</field>
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<field type="DateTimeField" name="pub_date">2006-06-16T15:00:00</field>
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<field to="serializers.category" name="categories" rel="ManyToManyRel">
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<object pk="1"></object>
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</field>
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</object>
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<object pk="1" model="serializers.author">
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<field type="CharField" name="name">Agnes</field>
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</object>
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<object pk="1" model="serializers.category">
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<field type="CharField" name="name">Reference</field></object>
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</django-objects>"""
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class JsonSerializerTestCase(SerializersTestBase, TestCase):
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serializer_name = "json"
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pkless_str = b"""[{"pk": null, "model": "serializers.category", "fields": {"name": "Reference"}}]"""
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@staticmethod
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def _validate_output(serial_str):
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try:
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json.loads(serial_str)
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except Exception:
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return False
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else:
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return True
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@staticmethod
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def _get_pk_values(serial_str):
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ret_list = []
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serial_list = json.loads(serial_str)
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for obj_dict in serial_list:
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ret_list.append(obj_dict["pk"])
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return ret_list
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@staticmethod
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def _get_field_values(serial_str, field_name):
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ret_list = []
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serial_list = json.loads(serial_str)
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for obj_dict in serial_list:
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if field_name in obj_dict["fields"]:
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ret_list.append(obj_dict["fields"][field_name])
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return ret_list
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class JsonSerializerTransactionTestCase(SerializersTransactionTestBase, TransactionTestCase):
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serializer_name = "json"
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fwd_ref_str = b"""[
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{
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"pk": 1,
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"model": "serializers.article",
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"fields": {
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"headline": "Forward references pose no problem",
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"pub_date": "2006-06-16T15:00:00",
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"categories": [1],
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"author": 1
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}
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},
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{
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"pk": 1,
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"model": "serializers.category",
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"fields": {
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"name": "Reference"
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}
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},
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{
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"pk": 1,
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"model": "serializers.author",
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"fields": {
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"name": "Agnes"
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}
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}]"""
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try:
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import yaml
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except ImportError:
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pass
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else:
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class YamlSerializerTestCase(SerializersTestBase, TestCase):
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serializer_name = "yaml"
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fwd_ref_str = b"""- fields:
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headline: Forward references pose no problem
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pub_date: 2006-06-16 15:00:00
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categories: [1]
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author: 1
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pk: 1
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model: serializers.article
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- fields:
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name: Reference
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pk: 1
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model: serializers.category
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- fields:
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name: Agnes
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pk: 1
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model: serializers.author"""
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pkless_str = b"""- fields:
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name: Reference
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pk: null
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model: serializers.category"""
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@staticmethod
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def _validate_output(serial_str):
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try:
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yaml.safe_load(StringIO(serial_str))
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except Exception:
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return False
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else:
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return True
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@staticmethod
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def _get_pk_values(serial_str):
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ret_list = []
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stream = StringIO(serial_str)
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for obj_dict in yaml.safe_load(stream):
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ret_list.append(obj_dict["pk"])
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return ret_list
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@staticmethod
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def _get_field_values(serial_str, field_name):
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ret_list = []
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stream = StringIO(serial_str)
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for obj_dict in yaml.safe_load(stream):
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if "fields" in obj_dict and field_name in obj_dict["fields"]:
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field_value = obj_dict["fields"][field_name]
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# yaml.safe_load will return non-string objects for some
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# of the fields we are interested in, this ensures that
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# everything comes back as a string
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if isinstance(field_value, six.string_types):
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ret_list.append(field_value)
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else:
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ret_list.append(str(field_value))
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return ret_list
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class YamlSerializerTransactionTestCase(SerializersTransactionTestBase, TransactionTestCase):
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serializer_name = "yaml"
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fwd_ref_str = b"""- fields:
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headline: Forward references pose no problem
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pub_date: 2006-06-16 15:00:00
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categories: [1]
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author: 1
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pk: 1
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model: serializers.article
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- fields:
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name: Reference
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pk: 1
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model: serializers.category
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- fields:
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name: Agnes
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pk: 1
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model: serializers.author"""
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