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from .utils import mock_reverse, fail_reverse, BadType, MockObject, MockQueryset
from django.core.exceptions import ImproperlyConfigured
from rest_framework import serializers
from rest_framework.test import APISimpleTestCase
import pytest
class TestStringRelatedField(APISimpleTestCase):
def setUp(self):
self.instance = MockObject(pk=1, name='foo')
self.field = serializers.StringRelatedField()
def test_string_related_representation(self):
representation = self.field.to_representation(self.instance)
assert representation == '<MockObject name=foo, pk=1>'
class TestPrimaryKeyRelatedField(APISimpleTestCase):
def setUp(self):
self.queryset = MockQueryset([
MockObject(pk=1, name='foo'),
MockObject(pk=2, name='bar'),
MockObject(pk=3, name='baz')
])
self.instance = self.queryset.items[2]
self.field = serializers.PrimaryKeyRelatedField(queryset=self.queryset)
def test_pk_related_lookup_exists(self):
instance = self.field.to_internal_value(self.instance.pk)
assert instance is self.instance
def test_pk_related_lookup_does_not_exist(self):
with pytest.raises(serializers.ValidationError) as excinfo:
self.field.to_internal_value(4)
msg = excinfo.value.detail[0]
assert msg == "Invalid pk '4' - object does not exist."
def test_pk_related_lookup_invalid_type(self):
with pytest.raises(serializers.ValidationError) as excinfo:
self.field.to_internal_value(BadType())
msg = excinfo.value.detail[0]
assert msg == 'Incorrect type. Expected pk value, received BadType.'
def test_pk_representation(self):
representation = self.field.to_representation(self.instance)
assert representation == self.instance.pk
class TestHyperlinkedIdentityField(APISimpleTestCase):
def setUp(self):
self.instance = MockObject(pk=1, name='foo')
self.field = serializers.HyperlinkedIdentityField(view_name='example')
self.field.reverse = mock_reverse
self.field._context = {'request': True}
def test_representation(self):
representation = self.field.to_representation(self.instance)
assert representation == 'http://example.org/example/1/'
def test_representation_unsaved_object(self):
representation = self.field.to_representation(MockObject(pk=None))
assert representation is None
def test_representation_with_format(self):
self.field._context['format'] = 'xml'
representation = self.field.to_representation(self.instance)
assert representation == 'http://example.org/example/1.xml/'
def test_improperly_configured(self):
"""
If a matching view cannot be reversed with the given instance,
the the user has misconfigured something, as the URL conf and the
hyperlinked field do not match.
"""
self.field.reverse = fail_reverse
with pytest.raises(ImproperlyConfigured):
self.field.to_representation(self.instance)
class TestHyperlinkedIdentityFieldWithFormat(APISimpleTestCase):
"""
Tests for a hyperlinked identity field that has a `format` set,
which enforces that alternate formats are never linked too.
Eg. If your API includes some endpoints that accept both `.xml` and `.json`,
but other endpoints that only accept `.json`, we allow for hyperlinked
relationships that enforce only a single suffix type.
"""
def setUp(self):
self.instance = MockObject(pk=1, name='foo')
self.field = serializers.HyperlinkedIdentityField(view_name='example', format='json')
self.field.reverse = mock_reverse
self.field._context = {'request': True}
def test_representation(self):
representation = self.field.to_representation(self.instance)
assert representation == 'http://example.org/example/1/'
def test_representation_with_format(self):
self.field._context['format'] = 'xml'
representation = self.field.to_representation(self.instance)
assert representation == 'http://example.org/example/1.json/'
class TestSlugRelatedField(APISimpleTestCase):
def setUp(self):
self.queryset = MockQueryset([
MockObject(pk=1, name='foo'),
MockObject(pk=2, name='bar'),
MockObject(pk=3, name='baz')
])
self.instance = self.queryset.items[2]
self.field = serializers.SlugRelatedField(
slug_field='name', queryset=self.queryset
)
def test_slug_related_lookup_exists(self):
instance = self.field.to_internal_value(self.instance.name)
assert instance is self.instance
def test_slug_related_lookup_does_not_exist(self):
with pytest.raises(serializers.ValidationError) as excinfo:
self.field.to_internal_value('doesnotexist')
msg = excinfo.value.detail[0]
assert msg == 'Object with name=doesnotexist does not exist.'
def test_slug_related_lookup_invalid_type(self):
with pytest.raises(serializers.ValidationError) as excinfo:
self.field.to_internal_value(BadType())
msg = excinfo.value.detail[0]
assert msg == 'Invalid value.'
def test_representation(self):
representation = self.field.to_representation(self.instance)
assert representation == self.instance.name
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