330 lines
10 KiB
Python
330 lines
10 KiB
Python
import datetime
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import decimal
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import json
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import re
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from django.core import serializers
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from django.core.serializers.base import DeserializationError
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from django.core.serializers.json import DjangoJSONEncoder
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from django.db import models
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from django.test import SimpleTestCase, TestCase, TransactionTestCase
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from django.test.utils import isolate_apps
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from django.utils.translation import gettext_lazy, override
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from .models import Score
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from .tests import SerializersTestBase, SerializersTransactionTestBase
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class JsonSerializerTestCase(SerializersTestBase, TestCase):
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serializer_name = "json"
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pkless_str = """[
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{
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"pk": null,
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"model": "serializers.category",
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"fields": {"name": "Reference"}
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}, {
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"model": "serializers.category",
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"fields": {"name": "Non-fiction"}
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}]"""
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mapping_ordering_str = """[
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{
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"model": "serializers.article",
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"pk": %(article_pk)s,
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"fields": {
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"author": %(author_pk)s,
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"headline": "Poker has no place on ESPN",
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"pub_date": "2006-06-16T11:00:00",
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"categories": [
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%(first_category_pk)s,
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%(second_category_pk)s
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],
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"meta_data": []
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}
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}
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]
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"""
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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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serial_list = json.loads(serial_str)
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return [obj_dict["pk"] for obj_dict in serial_list]
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@staticmethod
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def _get_field_values(serial_str, field_name):
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serial_list = json.loads(serial_str)
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return [
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obj_dict["fields"][field_name]
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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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]
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def test_indentation_whitespace(self):
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s = serializers.json.Serializer()
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json_data = s.serialize([Score(score=5.0), Score(score=6.0)], indent=2)
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for line in json_data.splitlines():
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if re.search(r".+,\s*$", line):
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self.assertEqual(line, line.rstrip())
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@isolate_apps("serializers")
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def test_custom_encoder(self):
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class ScoreDecimal(models.Model):
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score = models.DecimalField()
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class CustomJSONEncoder(json.JSONEncoder):
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def default(self, o):
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if isinstance(o, decimal.Decimal):
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return str(o)
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return super().default(o)
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s = serializers.json.Serializer()
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json_data = s.serialize(
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[ScoreDecimal(score=decimal.Decimal(1.0))], cls=CustomJSONEncoder
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)
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self.assertIn('"fields": {"score": "1"}', json_data)
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def test_json_deserializer_exception(self):
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with self.assertRaises(DeserializationError):
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for obj in serializers.deserialize("json", """[{"pk":1}"""):
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pass
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def test_helpful_error_message_invalid_pk(self):
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"""
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If there is an invalid primary key, the error message should contain
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the model associated with it.
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"""
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test_string = """[{
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"pk": "badpk",
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"model": "serializers.player",
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"fields": {
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"name": "Bob",
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"rank": 1,
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"team": "Team"
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}
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}]"""
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with self.assertRaisesMessage(
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DeserializationError, "(serializers.player:pk=badpk)"
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):
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list(serializers.deserialize("json", test_string))
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def test_helpful_error_message_invalid_field(self):
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"""
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If there is an invalid field value, the error message should contain
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the model associated with it.
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"""
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test_string = """[{
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"pk": "1",
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"model": "serializers.player",
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"fields": {
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"name": "Bob",
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"rank": "invalidint",
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"team": "Team"
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}
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}]"""
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expected = "(serializers.player:pk=1) field_value was 'invalidint'"
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with self.assertRaisesMessage(DeserializationError, expected):
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list(serializers.deserialize("json", test_string))
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def test_helpful_error_message_for_foreign_keys(self):
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"""
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Invalid foreign keys with a natural key should throw a helpful error
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message, such as what the failing key is.
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"""
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test_string = """[{
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"pk": 1,
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"model": "serializers.category",
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"fields": {
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"name": "Unknown foreign key",
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"meta_data": [
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"doesnotexist",
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"metadata"
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]
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}
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}]"""
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key = ["doesnotexist", "metadata"]
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expected = "(serializers.category:pk=1) field_value was '%r'" % key
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with self.assertRaisesMessage(DeserializationError, expected):
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list(serializers.deserialize("json", test_string))
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def test_helpful_error_message_for_many2many_non_natural(self):
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"""
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Invalid many-to-many keys should throw a helpful error message.
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"""
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test_string = """[{
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"pk": 1,
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"model": "serializers.article",
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"fields": {
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"author": 1,
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"headline": "Unknown many to many",
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"pub_date": "2014-09-15T10:35:00",
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"categories": [1, "doesnotexist"]
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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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"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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expected = "(serializers.article:pk=1) field_value was 'doesnotexist'"
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with self.assertRaisesMessage(DeserializationError, expected):
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list(serializers.deserialize("json", test_string))
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def test_helpful_error_message_for_many2many_natural1(self):
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"""
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Invalid many-to-many keys should throw a helpful error message.
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This tests the code path where one of a list of natural keys is invalid.
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"""
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test_string = """[{
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"pk": 1,
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"model": "serializers.categorymetadata",
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"fields": {
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"kind": "author",
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"name": "meta1",
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"value": "Agnes"
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}
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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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"author": 1,
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"headline": "Unknown many to many",
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"pub_date": "2014-09-15T10:35:00",
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"meta_data": [
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["author", "meta1"],
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["doesnotexist", "meta1"],
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["author", "meta1"]
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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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key = ["doesnotexist", "meta1"]
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expected = "(serializers.article:pk=1) field_value was '%r'" % key
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with self.assertRaisesMessage(DeserializationError, expected):
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for obj in serializers.deserialize("json", test_string):
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obj.save()
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def test_helpful_error_message_for_many2many_natural2(self):
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"""
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Invalid many-to-many keys should throw a helpful error message. This
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tests the code path where a natural many-to-many key has only a single
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value.
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"""
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test_string = """[{
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"pk": 1,
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"model": "serializers.article",
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"fields": {
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"author": 1,
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"headline": "Unknown many to many",
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"pub_date": "2014-09-15T10:35:00",
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"meta_data": [1, "doesnotexist"]
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}
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}, {
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"pk": 1,
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"model": "serializers.categorymetadata",
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"fields": {
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"kind": "author",
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"name": "meta1",
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"value": "Agnes"
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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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expected = "(serializers.article:pk=1) field_value was 'doesnotexist'"
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with self.assertRaisesMessage(DeserializationError, expected):
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for obj in serializers.deserialize("json", test_string, ignore=False):
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obj.save()
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def test_helpful_error_message_for_many2many_not_iterable(self):
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"""
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Not iterable many-to-many field value throws a helpful error message.
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"""
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test_string = """[{
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"pk": 1,
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"model": "serializers.m2mdata",
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"fields": {"data": null}
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}]"""
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expected = "(serializers.m2mdata:pk=1) field_value was 'None'"
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with self.assertRaisesMessage(DeserializationError, expected):
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next(serializers.deserialize("json", test_string, ignore=False))
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class JsonSerializerTransactionTestCase(
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SerializersTransactionTestBase, TransactionTestCase
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):
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serializer_name = "json"
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fwd_ref_str = """[
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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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class DjangoJSONEncoderTests(SimpleTestCase):
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def test_lazy_string_encoding(self):
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self.assertEqual(
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json.dumps({"lang": gettext_lazy("French")}, cls=DjangoJSONEncoder),
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'{"lang": "French"}',
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)
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with override("fr"):
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self.assertEqual(
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json.dumps({"lang": gettext_lazy("French")}, cls=DjangoJSONEncoder),
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'{"lang": "Fran\\u00e7ais"}',
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)
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def test_timedelta(self):
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duration = datetime.timedelta(days=1, hours=2, seconds=3)
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self.assertEqual(
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json.dumps({"duration": duration}, cls=DjangoJSONEncoder),
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'{"duration": "P1DT02H00M03S"}',
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)
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duration = datetime.timedelta(0)
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self.assertEqual(
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json.dumps({"duration": duration}, cls=DjangoJSONEncoder),
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'{"duration": "P0DT00H00M00S"}',
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)
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