def test_get_signal_function(self):
# check cache
f = FileFieldAutoChangeDelete('file_field')
a = f.get_signal_function()
b = f.get_signal_function()
self.assertIs(a, b)
# with file_field
mock = MagicMock()
a(None, mock)
self.assertIn(call.is_dirty, mock.mock_calls)
self.assertIn(call.get_dirty_fields().get('file_field', None),
mock.mock_calls)
self.assertIn(call.get_dirty_fields().get().delete(save=False),
mock.mock_calls)
mock = MagicMock()
mock.get_dirty_fields.return_value = {}
a(None, mock)
self.assertNotIn(call.get_dirty_fields().get().delete(save=False),
mock.mock_calls)
def setup_method(self, method):
self.decorator = FileFieldAutoChangeDelete()
class TestFileFieldAutoChangeDelete(TestCase):
def setup_method(self, method):
self.decorator = FileFieldAutoChangeDelete()
def get_model(self):
class Model(DirtyFieldsMixin, models.Model):
file_field = models.FileField(upload_to='foo')
foo_field = models.CharField(max_length=32)
class Meta(object):
app_label = 'foo'
return Model
def get_empty_model(self):
class ModelEmpty(DirtyFieldsMixin, models.Model):
class Meta(object):
app_label = 'foo'
return ModelEmpty
def test_init(self):
decorator = FileFieldAutoChangeDelete()
assert decorator.field_names == '*'
assert decorator.signal is models.signals.post_save
assert decorator.signal_name_pattern == 'post_save_{model.__name__}_changedelete_{field}'
def test_validate_model_no_is_dirty_implementation(self):
self.decorator.to_wrap = self.get_empty_model()
self.decorator.to_wrap.is_dirty = None
self.decorator.to_wrap.get_dirty_fields = None
with pytest.raises(ValueError):
self.decorator.validate_model()
def test_validate_model(self):
self.decorator.to_wrap = self.get_empty_model()
assert self.decorator.validate_model() is None
@mock.patch.object(DirtyFieldsMixin, 'get_dirty_fields')
@mock.patch.object(DirtyFieldsMixin, 'is_dirty')
def test_get_signal_function_not_dirty(
self, mock_is_dirty, mock_get_dirty_fields):
mock_is_dirty.return_value = False
model = self.get_model()
self.decorator.to_wrap = model
self.decorator.fields = ['file_field']
signal = self.decorator.get_signal_function()
assert callable(signal)
instance = model()
assert signal(model, instance) is None
mock_is_dirty.assert_called_once_with()
assert not mock_get_dirty_fields.called
@mock.patch.object(DirtyFieldsMixin, 'get_dirty_fields')
@mock.patch.object(DirtyFieldsMixin, 'is_dirty')
def test_get_signal_function_dirty_but_no_file(
self, mock_is_dirty, mock_get_dirty_fields):
mock_is_dirty.return_value = True
mock_get_dirty_fields.return_value = {}
model = self.get_model()
self.decorator.to_wrap = model
self.decorator.fields = [FieldSpec('file_field', None)]
signal = self.decorator.get_signal_function()
assert callable(signal)
instance = model()
assert signal(model, instance) is None
mock_is_dirty.assert_called_once_with()
mock_get_dirty_fields.assert_called_once_with()
@mock.patch.object(DirtyFieldsMixin, 'get_dirty_fields')
@mock.patch.object(DirtyFieldsMixin, 'is_dirty')
def test_get_signal_function(
self, mock_is_dirty, mock_get_dirty_fields):
f = mock.MagicMock()
field = mock.MagicMock()
mock_is_dirty.return_value = True
mock_get_dirty_fields.return_value = {'file_field': f}
model = self.get_model()
self.decorator.to_wrap = model
self.decorator.fields = [FieldSpec('file_field', field)]
signal = self.decorator.get_signal_function()
assert callable(signal)
instance = model(file_field='foo')
assert signal(model, instance) is None
mock_is_dirty.assert_called_once_with()
mock_get_dirty_fields.assert_called_once_with()
f.delete.assert_called_once_with(save=False)
assert f.instance == instance
assert f.field == field
assert f.storage == field.storage
assert instance.file_field == 'foo'
def setUpClass(cls):
cls.f = FileFieldAutoChangeDelete.to_decorator()('file_field')