def test_hydrate(self):
note = Note.objects.get(pk=1)
bundle = Bundle(obj=note)
# With no value, default or nullable, we should get an ``ApiFieldError``.
field_1 = ApiField()
field_1.instance_name = 'api'
self.assertRaises(ApiFieldError, field_1.hydrate, bundle)
# The default.
field_2 = ApiField(default='foo')
field_2.instance_name = 'api'
self.assertEqual(field_2.hydrate(bundle), 'foo')
# The callable default.
def foo():
return 'bar'
field_3 = ApiField(default=foo)
field_3.instance_name = 'api'
self.assertEqual(field_3.hydrate(bundle), 'bar')
# The nullable case.
field_4 = ApiField(null=True)
field_4.instance_name = 'api'
self.assertEqual(field_4.hydrate(bundle), None)
# The readonly case.
field_5 = ApiField(readonly=True)
field_5.instance_name = 'api'
bundle.data['api'] = 'abcdef'
self.assertEqual(field_5.hydrate(bundle), None)
# A real, live attribute!
field_6 = ApiField(attribute='title')
field_6.instance_name = 'api'
bundle.data['api'] = note.title
self.assertEqual(field_6.hydrate(bundle), u'First Post!')
# Make sure it uses attribute when there's no data
field_7 = ApiField(attribute='title')
field_7.instance_name = 'notinbundle'
self.assertEqual(field_7.hydrate(bundle), u'First Post!')
# Make sure it falls back to instance name if there is no attribute
field_8 = ApiField()
field_8.instance_name = 'title'
self.assertEqual(field_8.hydrate(bundle), u'First Post!')
# Attribute & null regression test.
# First, simulate data missing from the bundle & ``null=True``.
field_9 = ApiField(attribute='notinbundle', null=True)
field_9.instance_name = 'notinbundle'
self.assertEqual(field_9.hydrate(bundle), None)
# The do something in the bundle also with ``null=True``.
field_10 = ApiField(attribute='title', null=True)
field_10.instance_name = 'title'
self.assertEqual(field_10.hydrate(bundle), u'First Post!')
# The blank case.
field_11 = ApiField(attribute='notinbundle', blank=True)
field_11.instance_name = 'notinbundle'
self.assertEqual(field_11.hydrate(bundle), None)
bundle.data['title'] = note.title
field_12 = ApiField(attribute='title', blank=True)
field_12.instance_name = 'title'
self.assertEqual(field_12.hydrate(bundle), u'First Post!')
