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import datetime
from django.test import TestCase
from rest_framework import serializers
from rest_framework.tests.models import *
class Comment(object):
def __init__(self, email, content, created):
self.email = email
self.content = content
self.created = created or datetime.datetime.now()
def __eq__(self, other):
return all([getattr(self, attr) == getattr(other, attr)
for attr in ('email', 'content', 'created')])
class CommentSerializer(serializers.Serializer):
email = serializers.EmailField()
content = serializers.CharField(max_length=1000)
created = serializers.DateTimeField()
def restore_object(self, data, instance=None):
if instance is None:
return Comment(**data)
for key, val in data.items():
setattr(instance, key, val)
return instance
class BasicTests(TestCase):
def setUp(self):
self.comment = Comment(
'tom@example.com',
'Happy new year!',
datetime.datetime(2012, 1, 1)
)
self.data = {
'email': 'tom@example.com',
'content': 'Happy new year!',
'created': datetime.datetime(2012, 1, 1)
}
def test_empty(self):
serializer = CommentSerializer()
expected = {
'email': '',
'content': '',
'created': None
}
self.assertEquals(serializer.data, expected)
def test_retrieve(self):
serializer = CommentSerializer(instance=self.comment)
expected = self.data
self.assertEquals(serializer.data, expected)
def test_create(self):
serializer = CommentSerializer(self.data)
expected = self.comment
self.assertEquals(serializer.is_valid(), True)
self.assertEquals(serializer.object, expected)
self.assertFalse(serializer.object is expected)
def test_update(self):
serializer = CommentSerializer(self.data, instance=self.comment)
expected = self.comment
self.assertEquals(serializer.is_valid(), True)
self.assertEquals(serializer.object, expected)
self.assertTrue(serializer.object is expected)
class ValidationTests(TestCase):
def setUp(self):
self.comment = Comment(
'tom@example.com',
'Happy new year!',
datetime.datetime(2012, 1, 1)
)
self.data = {
'email': 'tom@example.com',
'content': 'x' * 1001,
'created': datetime.datetime(2012, 1, 1)
}
def test_create(self):
serializer = CommentSerializer(self.data)
self.assertEquals(serializer.is_valid(), False)
self.assertEquals(serializer.errors, {'content': [u'Ensure this value has at most 1000 characters (it has 1001).']})
def test_update(self):
serializer = CommentSerializer(self.data, instance=self.comment)
self.assertEquals(serializer.is_valid(), False)
self.assertEquals(serializer.errors, {'content': [u'Ensure this value has at most 1000 characters (it has 1001).']})
class MetadataTests(TestCase):
def test_empty(self):
serializer = CommentSerializer()
expected = {
'email': serializers.CharField,
'content': serializers.CharField,
'created': serializers.DateTimeField
}
for field_name, field in expected.items():
self.assertTrue(isinstance(serializer.data.fields[field_name], field))
class ManyToManyTests(TestCase):
def setUp(self):
class ManyToManySerializer(serializers.ModelSerializer):
class Meta:
model = ManyToManyModel
self.serializer_class = ManyToManySerializer
# An anchor instance to use for the relationship
self.anchor = Anchor()
self.anchor.save()
# A model instance with a many to many relationship to the anchor
self.instance = ManyToManyModel()
self.instance.save()
self.instance.rel.add(self.anchor)
# A serialized representation of the model instance
self.data = {'id': 1, 'rel': [self.anchor.id]}
def test_retrieve(self):
"""
Serialize an instance of a model with a ManyToMany relationship.
"""
serializer = self.serializer_class(instance=self.instance)
expected = self.data
self.assertEquals(serializer.data, expected)
def test_create(self):
"""
Create an instance of a model with a ManyToMany relationship.
"""
data = {'rel': [self.anchor.id]}
serializer = self.serializer_class(data)
self.assertEquals(serializer.is_valid(), True)
instance = serializer.save()
self.assertEquals(len(ManyToManyModel.objects.all()), 2)
self.assertEquals(instance.pk, 2)
self.assertEquals(list(instance.rel.all()), [self.anchor])
def test_update(self):
"""
Update an instance of a model with a ManyToMany relationship.
"""
new_anchor = Anchor()
new_anchor.save()
data = {'rel': [self.anchor.id, new_anchor.id]}
serializer = self.serializer_class(data, instance=self.instance)
self.assertEquals(serializer.is_valid(), True)
instance = serializer.save()
self.assertEquals(len(ManyToManyModel.objects.all()), 1)
self.assertEquals(instance.pk, 1)
self.assertEquals(list(instance.rel.all()), [self.anchor, new_anchor])
def test_create_empty_relationship(self):
"""
Create an instance of a model with a ManyToMany relationship,
containing no items.
"""
data = {'rel': []}
serializer = self.serializer_class(data)
self.assertEquals(serializer.is_valid(), True)
instance = serializer.save()
self.assertEquals(len(ManyToManyModel.objects.all()), 2)
self.assertEquals(instance.pk, 2)
self.assertEquals(list(instance.rel.all()), [])
def test_update_empty_relationship(self):
"""
Update an instance of a model with a ManyToMany relationship,
containing no items.
"""
new_anchor = Anchor()
new_anchor.save()
data = {'rel': []}
serializer = self.serializer_class(data, instance=self.instance)
self.assertEquals(serializer.is_valid(), True)
instance = serializer.save()
self.assertEquals(len(ManyToManyModel.objects.all()), 1)
self.assertEquals(instance.pk, 1)
self.assertEquals(list(instance.rel.all()), [])
def test_create_empty_relationship_flat_data(self):
"""
Create an instance of a model with a ManyToMany relationship,
containing no items, using a representation that does not support
lists (eg form data).
"""
data = {'rel': ''}
serializer = self.serializer_class(data)
self.assertEquals(serializer.is_valid(), True)
instance = serializer.save()
self.assertEquals(len(ManyToManyModel.objects.all()), 2)
self.assertEquals(instance.pk, 2)
self.assertEquals(list(instance.rel.all()), [])
# def test_deserialization_for_update(self):
# serializer = self.serializer_class(self.data, instance=self.instance)
# expected = self.instance
# self.assertEquals(serializer.is_valid(), True)
# self.assertEquals(serializer.object, expected)
# self.assertTrue(serializer.object is expected)
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