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import unittest
import warnings
from scrapy.exceptions import UsageError, ScrapyDeprecationWarning
from scrapy.settings import BaseSettings, Settings
from scrapy.utils.conf import (
arglist_to_dict,
build_component_list,
feed_complete_default_values_from_settings,
feed_process_params_from_cli
)
class BuildComponentListTest(unittest.TestCase):
def test_build_dict(self):
d = {'one': 1, 'two': None, 'three': 8, 'four': 4}
self.assertEqual(build_component_list(d, convert=lambda x: x),
['one', 'four', 'three'])
def test_backward_compatible_build_dict(self):
base = {'one': 1, 'two': 2, 'three': 3, 'five': 5, 'six': None}
custom = {'two': None, 'three': 8, 'four': 4}
self.assertEqual(build_component_list(base, custom,
convert=lambda x: x),
['one', 'four', 'five', 'three'])
def test_return_list(self):
custom = ['a', 'b', 'c']
self.assertEqual(build_component_list(None, custom,
convert=lambda x: x),
custom)
def test_map_dict(self):
custom = {'one': 1, 'two': 2, 'three': 3}
self.assertEqual(build_component_list({}, custom,
convert=lambda x: x.upper()),
['ONE', 'TWO', 'THREE'])
def test_map_list(self):
custom = ['a', 'b', 'c']
self.assertEqual(build_component_list(None, custom,
lambda x: x.upper()),
['A', 'B', 'C'])
def test_duplicate_components_in_dict(self):
duplicate_dict = {'one': 1, 'two': 2, 'ONE': 4}
self.assertRaises(ValueError, build_component_list, {}, duplicate_dict,
convert=lambda x: x.lower())
def test_duplicate_components_in_list(self):
duplicate_list = ['a', 'b', 'a']
with self.assertRaises(ValueError) as cm:
build_component_list(None, duplicate_list, convert=lambda x: x)
self.assertIn(str(duplicate_list), str(cm.exception))
def test_duplicate_components_in_basesettings(self):
# Higher priority takes precedence
duplicate_bs = BaseSettings({'one': 1, 'two': 2}, priority=0)
duplicate_bs.set('ONE', 4, priority=10)
self.assertEqual(build_component_list(duplicate_bs,
convert=lambda x: x.lower()),
['two', 'one'])
duplicate_bs.set('one', duplicate_bs['one'], priority=20)
self.assertEqual(build_component_list(duplicate_bs,
convert=lambda x: x.lower()),
['one', 'two'])
# Same priority raises ValueError
duplicate_bs.set('ONE', duplicate_bs['ONE'], priority=20)
self.assertRaises(ValueError, build_component_list, duplicate_bs,
convert=lambda x: x.lower())
def test_valid_numbers(self):
# work well with None and numeric values
d = {'a': 10, 'b': None, 'c': 15, 'd': 5.0}
self.assertEqual(build_component_list(d, convert=lambda x: x),
['d', 'a', 'c'])
d = {'a': 33333333333333333333, 'b': 11111111111111111111, 'c': 22222222222222222222}
self.assertEqual(build_component_list(d, convert=lambda x: x),
['b', 'c', 'a'])
# raise exception for invalid values
d = {'one': '5'}
self.assertRaises(ValueError, build_component_list, {}, d, convert=lambda x: x)
d = {'one': '1.0'}
self.assertRaises(ValueError, build_component_list, {}, d, convert=lambda x: x)
d = {'one': [1, 2, 3]}
self.assertRaises(ValueError, build_component_list, {}, d, convert=lambda x: x)
d = {'one': {'a': 'a', 'b': 2}}
self.assertRaises(ValueError, build_component_list, {}, d, convert=lambda x: x)
d = {'one': 'lorem ipsum'}
self.assertRaises(ValueError, build_component_list, {}, d, convert=lambda x: x)
class UtilsConfTestCase(unittest.TestCase):
def test_arglist_to_dict(self):
self.assertEqual(
arglist_to_dict(['arg1=val1', 'arg2=val2']),
{'arg1': 'val1', 'arg2': 'val2'})
class FeedExportConfigTestCase(unittest.TestCase):
def test_feed_export_config_invalid_format(self):
settings = Settings()
self.assertRaises(UsageError, feed_process_params_from_cli, settings, ['items.dat'], 'noformat')
def test_feed_export_config_mismatch(self):
settings = Settings()
self.assertRaises(
UsageError,
feed_process_params_from_cli, settings, ['items1.dat', 'items2.dat'], 'noformat'
)
def test_feed_export_config_backward_compatible(self):
with warnings.catch_warnings(record=True) as cw:
settings = Settings()
self.assertEqual(
{'items.dat': {'format': 'csv'}},
feed_process_params_from_cli(settings, ['items.dat'], 'csv')
)
self.assertEqual(cw[0].category, ScrapyDeprecationWarning)
def test_feed_export_config_explicit_formats(self):
settings = Settings()
self.assertEqual(
{'items_1.dat': {'format': 'json'}, 'items_2.dat': {'format': 'xml'}, 'items_3.dat': {'format': 'csv'}},
feed_process_params_from_cli(settings, ['items_1.dat:json', 'items_2.dat:xml', 'items_3.dat:csv'])
)
def test_feed_export_config_implicit_formats(self):
settings = Settings()
self.assertEqual(
{'items_1.json': {'format': 'json'}, 'items_2.xml': {'format': 'xml'}, 'items_3.csv': {'format': 'csv'}},
feed_process_params_from_cli(settings, ['items_1.json', 'items_2.xml', 'items_3.csv'])
)
def test_feed_export_config_stdout(self):
settings = Settings()
self.assertEqual(
{'stdout:': {'format': 'pickle'}},
feed_process_params_from_cli(settings, ['-:pickle'])
)
def test_feed_export_config_overwrite(self):
settings = Settings()
self.assertEqual(
{'output.json': {'format': 'json', 'overwrite': True}},
feed_process_params_from_cli(settings, [], None, ['output.json'])
)
def test_output_and_overwrite_output(self):
with self.assertRaises(UsageError):
feed_process_params_from_cli(
Settings(),
['output1.json'],
None,
['output2.json'],
)
def test_feed_complete_default_values_from_settings_empty(self):
feed = {}
settings = Settings({
"FEED_EXPORT_ENCODING": "custom encoding",
"FEED_EXPORT_FIELDS": ["f1", "f2", "f3"],
"FEED_EXPORT_INDENT": 42,
"FEED_STORE_EMPTY": True,
"FEED_URI_PARAMS": (1, 2, 3, 4),
"FEED_EXPORT_BATCH_ITEM_COUNT": 2,
})
new_feed = feed_complete_default_values_from_settings(feed, settings)
self.assertEqual(new_feed, {
"encoding": "custom encoding",
"fields": ["f1", "f2", "f3"],
"indent": 42,
"store_empty": True,
"uri_params": (1, 2, 3, 4),
"batch_item_count": 2,
"item_export_kwargs": dict(),
})
def test_feed_complete_default_values_from_settings_non_empty(self):
feed = {
"encoding": "other encoding",
"fields": None,
}
settings = Settings({
"FEED_EXPORT_ENCODING": "custom encoding",
"FEED_EXPORT_FIELDS": ["f1", "f2", "f3"],
"FEED_EXPORT_INDENT": 42,
"FEED_STORE_EMPTY": True,
"FEED_EXPORT_BATCH_ITEM_COUNT": 2,
})
new_feed = feed_complete_default_values_from_settings(feed, settings)
self.assertEqual(new_feed, {
"encoding": "other encoding",
"fields": None,
"indent": 42,
"store_empty": True,
"uri_params": None,
"batch_item_count": 2,
"item_export_kwargs": dict(),
})
if __name__ == "__main__":
unittest.main()
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