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test_lazy_hyperlinks.py
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from django.conf.urls import url
from django.db import models
from django.test import TestCase, override_settings
from rest_framework import serializers
from rest_framework.renderers import JSONRenderer
from rest_framework.templatetags.rest_framework import format_value
str_called = False
class Example(models.Model):
text = models.CharField(max_length=100)
def __str__(self):
global str_called
str_called = True
return 'An example'
class ExampleSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = Example
fields = ('url', 'id', 'text')
def dummy_view(request):
pass
urlpatterns = [
url(r'^example/(?P<pk>[0-9]+)/$', dummy_view, name='example-detail'),
]
@override_settings(ROOT_URLCONF='tests.test_lazy_hyperlinks')
class TestLazyHyperlinkNames(TestCase):
def setUp(self):
self.example = Example.objects.create(text='foo')
def test_lazy_hyperlink_names(self):
global str_called
context = {'request': None}
serializer = ExampleSerializer(self.example, context=context)
JSONRenderer().render(serializer.data)
assert not str_called
hyperlink_string = format_value(serializer.data['url'])
assert hyperlink_string == '<a href=/example/1/>An example</a>'
assert str_called