tests/unit/test_model.py

   1 import unittest
   2
   3
   4 class TestObserver(unittest.TestCase):
   5     def _make_observer(self, *args):
   6         from juju.model import _Observer
   7         return _Observer(*args)
   8
   9     def _make_delta(self, entity, type_, data=None):
  10         from juju.delta import ApplicationDelta
  11         return ApplicationDelta([entity, type_, data])
  12
  13     def test_cares_about_id(self):
  14         id_ = 'foo'
  15
  16         o = self._make_observer(
  17             None, None, None, id_, None)
  18
  19         delta = self._make_delta(
  20             'application', 'change', dict(name=id_))
  21
  22         self.assertTrue(o.cares_about(delta))
  23
  24     def test_cares_about_type(self):
  25         type_ = 'application'
  26
  27         o = self._make_observer(
  28             None, type_, None, None, None)
  29
  30         delta = self._make_delta(
  31             type_, 'change', dict(name='foo'))
  32
  33         self.assertTrue(o.cares_about(delta))
  34
  35     def test_cares_about_action(self):
  36         action = 'change'
  37
  38         o = self._make_observer(
  39             None, None, action, None, None)
  40
  41         delta = self._make_delta(
  42             'application', action, dict(name='foo'))
  43
  44         self.assertTrue(o.cares_about(delta))
  45
  46     def test_cares_about_predicate(self):
  47         def predicate(delta):
  48             return delta.data.get('fizz') == 'bang'
  49
  50         o = self._make_observer(
  51             None, None, None, None, predicate)
  52
  53         delta = self._make_delta(
  54             'application', 'change', dict(fizz='bang'))
  55
  56         self.assertTrue(o.cares_about(delta))