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from django.db import connection, models
from django.test import SimpleTestCase
from .fields import CustomDescriptorField, CustomTypedField
class TestDbType(SimpleTestCase):
def test_db_parameters_respects_db_type(self):
f = CustomTypedField()
self.assertEqual(f.db_parameters(connection)['type'], 'custom_field')
class DescriptorClassTest(SimpleTestCase):
def test_descriptor_class(self):
class CustomDescriptorModel(models.Model):
name = CustomDescriptorField(max_length=32)
m = CustomDescriptorModel()
self.assertFalse(hasattr(m, '_name_get_count'))
# The field is set to its default in the model constructor.
self.assertEqual(m._name_set_count, 1)
m.name = 'foo'
self.assertFalse(hasattr(m, '_name_get_count'))
self.assertEqual(m._name_set_count, 2)
self.assertEqual(m.name, 'foo')
self.assertEqual(m._name_get_count, 1)
self.assertEqual(m._name_set_count, 2)
m.name = 'bar'
self.assertEqual(m._name_get_count, 1)
self.assertEqual(m._name_set_count, 3)
self.assertEqual(m.name, 'bar')
self.assertEqual(m._name_get_count, 2)
self.assertEqual(m._name_set_count, 3)
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