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# Copyright: See the LICENSE file.
"""Tests about developer experience: help messages, errors, etc."""
import collections
import unittest
import factory
import factory.errors
Country = collections.namedtuple('Country', ['name', 'continent', 'capital_city'])
City = collections.namedtuple('City', ['name', 'population'])
class DeclarationTests(unittest.TestCase):
def test_subfactory_to_model(self):
"""A helpful error message occurs when pointing a subfactory to a model."""
class CountryFactory(factory.Factory):
class Meta:
model = Country
name = factory.Faker('country')
continent = "Antarctica"
# Error here: pointing the SubFactory to a model, not a factory.
capital_city = factory.SubFactory(City)
with self.assertRaises(factory.errors.AssociatedClassError) as raised:
CountryFactory()
self.assertIn('City', str(raised.exception))
self.assertIn('Country', str(raised.exception))
def test_subfactory_to_factorylike_model(self):
"""A helpful error message occurs when pointing a subfactory to a model.
This time with a model that looks more like a factory (ie has a `._meta`)."""
class CityModel:
_meta = None
name = "Coruscant"
population = 0
class CountryFactory(factory.Factory):
class Meta:
model = Country
name = factory.Faker('country')
continent = "Antarctica"
# Error here: pointing the SubFactory to a model, not a factory.
capital_city = factory.SubFactory(CityModel)
with self.assertRaises(factory.errors.AssociatedClassError) as raised:
CountryFactory()
self.assertIn('CityModel', str(raised.exception))
self.assertIn('Country', str(raised.exception))
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