def test_ordered(self):
"""Tests the handling of OrderedDeclaration."""
class ExampleFactory(object):
@classmethod
def _generate_next_sequence(cls):
return 42
two = declarations.LazyAttribute(lambda o: 2 * o.one)
three = declarations.LazyAttribute(lambda o: o.one + o.two)
holder = DeclarationsHolder({'one': 1, 'two': two, 'three': three})
self.assertEqual([('one', 1), ('two', two), ('three', three)],
holder.items())
self.assertEqual(two, holder['two'])
attrs = holder.build_attributes(ExampleFactory)
self.assertEqual(1, attrs['one'])
self.assertEqual(2, attrs['two'])
self.assertEqual(3, attrs['three'])
attrs = holder.build_attributes(ExampleFactory, False, {'one': 4})
self.assertEqual(4, attrs['one'])
self.assertEqual(8, attrs['two'])
self.assertEqual(12, attrs['three'])
attrs = holder.build_attributes(ExampleFactory, False, {'one': 4, 'two': 2})
self.assertEqual(4, attrs['one'])
self.assertEqual(2, attrs['two'])
self.assertEqual(6, attrs['three'])
def test_simple(self):
"""Tests a simple use case without OrderedDeclaration."""
class ExampleFactory(object):
@classmethod
def _generate_next_sequence(cls):
return 42
holder = DeclarationsHolder({'one': 1, 'two': 2})
self.assertTrue('one' in holder)
self.assertTrue('two' in holder)
holder.update_base({'two': 3, 'three': 3})
self.assertEqual(1, holder['one'])
self.assertEqual(3, holder['two'])
self.assertEqual(3, holder['three'])
attrs = holder.build_attributes(ExampleFactory)
self.assertEqual(1, attrs['one'])
self.assertEqual(3, attrs['two'])
self.assertEqual(3, attrs['three'])
self.assertEqual(42, ExampleFactory.sequence)
self.assertEqual(set([('one', 1), ('two', 3), ('three', 3)]),
set(holder.items()))
attrs = holder.build_attributes(ExampleFactory, False, {'two': 2})
self.assertEqual(1, attrs['one'])
self.assertEqual(2, attrs['two'])
self.assertEqual(3, attrs['three'])
