def test_transformer_method(self):
keypaths = [
Keypath('car.engine_size', 'new data.Capacity', transformer_fn=self.triple),
]
extractor = KeypathExtractor(keypaths)
values = extractor.extract(data_object)
self.assertEqual(values['new data']['Capacity'], 6.0)
def test_transformer_function(self):
keypaths = [
Keypath('car.number_of_doors', 'new data.Door Count', transformer_fn=double),
]
extractor = KeypathExtractor(keypaths)
values = extractor.extract(data_object)
self.assertEqual(values['new data']['Door Count'], 8)
def test_has_keypath(self):
keypaths = [
Keypath('car.number_of_doors', 'new data.Door Count'),
Keypath('car.number_of_windows', 'Windows Count'),
]
extractor = KeypathExtractor(keypaths)
self.assertTrue(extractor.has_keypath(data_object, keypaths[0].source_keypath))
self.assertFalse(extractor.has_keypath(data_object, keypaths[1].source_keypath))
def test_keypath_separator(self):
keypaths = [
Keypath('car#number_of_doors', 'new data#Door Count'),
Keypath('car#fuel_type#0', 'new data#Primary Fuel'),
]
extractor = KeypathExtractor(keypaths, separator='#')
values = extractor.extract(data_object)
self.assertTrue('new data' in values)
self.assertEqual(values['new data']['Door Count'], 4)
self.assertEqual(values['new data']['Primary Fuel'], 'petrol')
def test_keypaths(self):
keypaths = [
Keypath('car.number_of_doors', 'new data.Door Count'),
Keypath('car.fuel_type.0', 'new data.Primary Fuel'),
Keypath('car.no_value', 'new data.No Value'),
]
extractor = KeypathExtractor(keypaths)
values = extractor.extract(data_object)
self.assertTrue('new data' in values)
self.assertEqual(values['new data']['Door Count'], 4)
self.assertEqual(values['new data']['Primary Fuel'], 'petrol')
self.assertEqual(values['new data']['No Value'], None)
def test_reuse_value_object(self):
keypaths1 = [
Keypath('car.number_of_doors', 'new data.Door Count'),
]
extractor = KeypathExtractor(keypaths1)
values = extractor.extract(data_object)
self.assertEqual(values['new data']['Door Count'], 4)
keypaths2 = [
Keypath('car.fuel_type.0', 'new data.Primary Fuel'),
]
extractor = KeypathExtractor(keypaths2)
values = extractor.extract(data_object, values)
self.assertEqual(values['new data']['Door Count'], 4)
self.assertEqual(values['new data']['Primary Fuel'], 'petrol')
def test_empty_keypaths(self):
keypaths = []
extractor = KeypathExtractor(keypaths)
values = extractor.extract(data_object)
self.assertEqual(values, {})
def test_optional_keypath(self):
keypaths = [
Keypath('car.number_of_windows', 'Windows Count', is_optional=True),
]
extractor = KeypathExtractor(keypaths)
extractor.extract(data_object)
def test_invalid_source_keypath(self):
keypaths = [
Keypath('car.number_of_windows', 'Windows Count'),
]
extractor = KeypathExtractor(keypaths)
self.assertRaises(KeyError, extractor.extract, data_object)