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test_utils_datatypes.py
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import copy
import unittest
from collections import Mapping, MutableMapping
from scrapy.utils.datatypes import CaselessDict, SequenceExclude
__doctests__ = ['scrapy.utils.datatypes']
class CaselessDictTest(unittest.TestCase):
def test_init_dict(self):
seq = {'red': 1, 'black': 3}
d = CaselessDict(seq)
self.assertEqual(d['red'], 1)
self.assertEqual(d['black'], 3)
def test_init_pair_sequence(self):
seq = (('red', 1), ('black', 3))
d = CaselessDict(seq)
self.assertEqual(d['red'], 1)
self.assertEqual(d['black'], 3)
def test_init_mapping(self):
class MyMapping(Mapping):
def __init__(self, **kwargs):
self._d = kwargs
def __getitem__(self, key):
return self._d[key]
def __iter__(self):
return iter(self._d)
def __len__(self):
return len(self._d)
seq = MyMapping(red=1, black=3)
d = CaselessDict(seq)
self.assertEqual(d['red'], 1)
self.assertEqual(d['black'], 3)
def test_init_mutable_mapping(self):
class MyMutableMapping(MutableMapping):
def __init__(self, **kwargs):
self._d = kwargs
def __getitem__(self, key):
return self._d[key]
def __setitem__(self, key, value):
self._d[key] = value
def __delitem__(self, key):
del self._d[key]
def __iter__(self):
return iter(self._d)
def __len__(self):
return len(self._d)
seq = MyMutableMapping(red=1, black=3)
d = CaselessDict(seq)
self.assertEqual(d['red'], 1)
self.assertEqual(d['black'], 3)
def test_caseless(self):
d = CaselessDict()
d['key_Lower'] = 1
self.assertEqual(d['KEy_loWer'], 1)
self.assertEqual(d.get('KEy_loWer'), 1)
d['KEY_LOWER'] = 3
self.assertEqual(d['key_Lower'], 3)
self.assertEqual(d.get('key_Lower'), 3)
def test_delete(self):
d = CaselessDict({'key_lower': 1})
del d['key_LOWER']
self.assertRaises(KeyError, d.__getitem__, 'key_LOWER')
self.assertRaises(KeyError, d.__getitem__, 'key_lower')
def test_getdefault(self):
d = CaselessDict()
self.assertEqual(d.get('c', 5), 5)
d['c'] = 10
self.assertEqual(d.get('c', 5), 10)
def test_setdefault(self):
d = CaselessDict({'a': 1, 'b': 2})
r = d.setdefault('A', 5)
self.assertEqual(r, 1)
self.assertEqual(d['A'], 1)
r = d.setdefault('c', 5)
self.assertEqual(r, 5)
self.assertEqual(d['C'], 5)
def test_fromkeys(self):
keys = ('a', 'b')
d = CaselessDict.fromkeys(keys)
self.assertEqual(d['A'], None)
self.assertEqual(d['B'], None)
d = CaselessDict.fromkeys(keys, 1)
self.assertEqual(d['A'], 1)
self.assertEqual(d['B'], 1)
instance = CaselessDict()
d = instance.fromkeys(keys)
self.assertEqual(d['A'], None)
self.assertEqual(d['B'], None)
d = instance.fromkeys(keys, 1)
self.assertEqual(d['A'], 1)
self.assertEqual(d['B'], 1)
def test_contains(self):
d = CaselessDict()
d['a'] = 1
assert 'a' in d
def test_pop(self):
d = CaselessDict()
d['a'] = 1
self.assertEqual(d.pop('A'), 1)
self.assertRaises(KeyError, d.pop, 'A')
def test_normkey(self):
class MyDict(CaselessDict):
def normkey(self, key):
return key.title()
d = MyDict()
d['key-one'] = 2
self.assertEqual(list(d.keys()), ['Key-One'])
def test_normvalue(self):
class MyDict(CaselessDict):
def normvalue(self, value):
if value is not None:
return value + 1
d = MyDict({'key': 1})
self.assertEqual(d['key'], 2)
self.assertEqual(d.get('key'), 2)
d = MyDict()
d['key'] = 1
self.assertEqual(d['key'], 2)
self.assertEqual(d.get('key'), 2)
d = MyDict()
d.setdefault('key', 1)
self.assertEqual(d['key'], 2)
self.assertEqual(d.get('key'), 2)
d = MyDict()
d.update({'key': 1})
self.assertEqual(d['key'], 2)
self.assertEqual(d.get('key'), 2)
d = MyDict.fromkeys(('key',), 1)
self.assertEqual(d['key'], 2)
self.assertEqual(d.get('key'), 2)
def test_copy(self):
h1 = CaselessDict({'header1': 'value'})
h2 = copy.copy(h1)
self.assertEqual(h1, h2)
self.assertEqual(h1.get('header1'), h2.get('header1'))
assert isinstance(h2, CaselessDict)
class SequenceExcludeTest(unittest.TestCase):
def test_list(self):
seq = [1, 2, 3]
d = SequenceExclude(seq)
self.assertIn(0, d)
self.assertIn(4, d)
self.assertNotIn(2, d)
def test_range(self):
seq = range(10, 20)
d = SequenceExclude(seq)
self.assertIn(5, d)
self.assertIn(20, d)
self.assertNotIn(15, d)
def test_six_range(self):
import six.moves
seq = six.moves.range(10**3, 10**6)
d = SequenceExclude(seq)
self.assertIn(10**2, d)
self.assertIn(10**7, d)
self.assertNotIn(10**4, d)
def test_range_step(self):
seq = range(10, 20, 3)
d = SequenceExclude(seq)
are_not_in = [v for v in range(10, 20, 3) if v in d]
self.assertEquals([], are_not_in)
are_not_in = [v for v in range(10, 20) if v in d]
self.assertEquals([11, 12, 14, 15, 17, 18], are_not_in)
def test_string_seq(self):
seq = "cde"
d = SequenceExclude(seq)
chars = "".join(v for v in "abcdefg" if v in d)
self.assertEquals("abfg", chars)
def test_stringset_seq(self):
seq = set("cde")
d = SequenceExclude(seq)
chars = "".join(v for v in "abcdefg" if v in d)
self.assertEquals("abfg", chars)
def test_set(self):
"""Anything that is not in the supplied sequence will evaluate as 'in' the container."""
seq = set([-3, "test", 1.1])
d = SequenceExclude(seq)
self.assertIn(0, d)
self.assertIn("foo", d)
self.assertIn(3.14, d)
self.assertIn(set("bar"), d)
# supplied sequence is a set, so checking for list (non)inclusion fails
self.assertRaises(TypeError, (0, 1, 2) in d)
self.assertRaises(TypeError, d.__contains__, ['a', 'b', 'c'])
for v in [-3, "test", 1.1]:
self.assertNotIn(v, d)
if __name__ == "__main__":
unittest.main()