def test_cb_subscribed(self):
domain = VariableDomain('d', 'd', [1, 2, 3, 4])
v = ExternalVariable('v', domain, value=1)
cb = MagicMock()
v.subscribe(cb)
v.value = 2
cb.assert_called_with(2)
def test_cb_unsusbcribed(self):
domain = VariableDomain('d', 'd', [1, 2, 3, 4])
v = ExternalVariable('v', domain, value=1)
cb = MagicMock()
v.subscribe(cb)
v.unsubscribe(cb)
v.value = 2
self.assertFalse(cb.called)
def test_clone_cb(self):
domain = VariableDomain('d', 'd', [1, 2, 3, 4])
v = ExternalVariable('v', domain, value=1)
cb = MagicMock()
cb_clone = MagicMock()
v.subscribe(cb)
v_clone = v.clone()
v_clone.subscribe(cb_clone)
v_clone.value = 3
self.assertFalse(cb.called)
cb_clone.assert_called_with(3)
def test_cb_subscribed_no_change(self):
domain = VariableDomain('d', 'd', [1, 2, 3, 4])
v = ExternalVariable('v', domain, value=1)
cb = MagicMock()
v.value = 2
v.subscribe(cb)
# The callback must be called only if the value has really changed
v.value = 2
self.assertFalse(cb.called)
v.value = 3
cb.assert_called_with(3)
cb.reset_mock()
v.value = 3
self.assertFalse(cb.called)