def test_data_provider(self):
""" Context will pull missing attributes from the data
provider and cache them within its own data.
"""
class AbcProvider(Provider):
def __init__(self, a, b, c):
self._a = a
self._b = b
self._c = c
@Provider.data_point
def a(self, context):
return self._a
@Provider.data_point
def ab(self, context):
return context.a + self._b
@Provider.data_point
def abc(self, context):
return context.ab + self._c
c = Context(data_provider=AbcProvider('A', 'b', 'C'))
self.assertEqual(c.abc, 'AbC')
c._data_provider = None
self.assertEqual(c.a, 'A')
self.assertEqual(c.ab, 'Ab')
self.assertEqual(c.abc, 'AbC')
del c['ab']
self.assertNotIn('ab', c)
self.assertEqual(len(c), 2)
def test_data_provider(self):
""" Context will pull missing attributes from the data
provider and cache them within its own data.
"""
class AbcProvider(Provider):
def __init__(self, a, b, c):
self._a = a
self._b = b
self._c = c
@Provider.data_point
def a(self, context):
return self._a
@Provider.data_point
def ab(self, context):
return context.a + self._b
@Provider.data_point
def abc(self, context):
return context.ab + self._c
c = Context(data_provider=AbcProvider('A', 'b', 'C'))
self.assertEqual(c.abc, 'AbC')
c._data_provider = None
self.assertEqual(c.a, 'A')
self.assertEqual(c.ab, 'Ab')
self.assertEqual(c.abc, 'AbC')
del c['ab']
self.assertNotIn('ab', c)
self.assertEqual(len(c), 2)
