def test_transforms_fetching_two_columns(self):
ce = ColumnExtractor(['trecho', 'palavra'])
actual = ce.transform(X)
expected = [['a', 'b'], ['c', 'd']]
self.assertEquals(expected, actual)
def test_transforms_fetching_one_attribute_column(self):
ce = ColumnExtractor(['Child.prop'])
actual = ce.transform(X)
expected = [['w'], ['z']]
self.assertEquals(expected, actual)
def test_transforms_fetching_only_one_column(self):
ce = ColumnExtractor(['trecho'])
actual = ce.transform(X)
expected = [['a'], ['c']]
self.assertEquals(expected, actual)
