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django/tests/regressiontests/utils/datastructures.py
2011-10-13 12:53:02 +00:00

284 lines
9.7 KiB
Python

"""
Tests for stuff in django.utils.datastructures.
"""
import copy
import pickle
from django.test import SimpleTestCase
from django.utils.datastructures import (DictWrapper, DotExpandedDict,
ImmutableList, MultiValueDict, MultiValueDictKeyError, MergeDict, SortedDict)
class SortedDictTests(SimpleTestCase):
def setUp(self):
self.d1 = SortedDict()
self.d1[7] = 'seven'
self.d1[1] = 'one'
self.d1[9] = 'nine'
self.d2 = SortedDict()
self.d2[1] = 'one'
self.d2[9] = 'nine'
self.d2[0] = 'nil'
self.d2[7] = 'seven'
def test_basic_methods(self):
self.assertEqual(self.d1.keys(), [7, 1, 9])
self.assertEqual(self.d1.values(), ['seven', 'one', 'nine'])
self.assertEqual(self.d1.items(), [(7, 'seven'), (1, 'one'), (9, 'nine')])
def test_overwrite_ordering(self):
""" Overwriting an item keeps it's place. """
self.d1[1] = 'ONE'
self.assertEqual(self.d1.values(), ['seven', 'ONE', 'nine'])
def test_append_items(self):
""" New items go to the end. """
self.d1[0] = 'nil'
self.assertEqual(self.d1.keys(), [7, 1, 9, 0])
def test_delete_and_insert(self):
"""
Deleting an item, then inserting the same key again will place it
at the end.
"""
del self.d2[7]
self.assertEqual(self.d2.keys(), [1, 9, 0])
self.d2[7] = 'lucky number 7'
self.assertEqual(self.d2.keys(), [1, 9, 0, 7])
def test_change_keys(self):
"""
Changing the keys won't do anything, it's only a copy of the
keys dict.
"""
k = self.d2.keys()
k.remove(9)
self.assertEqual(self.d2.keys(), [1, 9, 0, 7])
def test_init_keys(self):
"""
Initialising a SortedDict with two keys will just take the first one.
A real dict will actually take the second value so we will too, but
we'll keep the ordering from the first key found.
"""
tuples = ((2, 'two'), (1, 'one'), (2, 'second-two'))
d = SortedDict(tuples)
self.assertEqual(d.keys(), [2, 1])
real_dict = dict(tuples)
self.assertEqual(sorted(real_dict.values()), ['one', 'second-two'])
# Here the order of SortedDict values *is* what we are testing
self.assertEqual(d.values(), ['second-two', 'one'])
def test_overwrite(self):
self.d1[1] = 'not one'
self.assertEqual(self.d1[1], 'not one')
self.assertEqual(self.d1.keys(), self.d1.copy().keys())
def test_append(self):
self.d1[13] = 'thirteen'
self.assertEqual(
repr(self.d1),
"{7: 'seven', 1: 'one', 9: 'nine', 13: 'thirteen'}"
)
def test_pop(self):
self.assertEqual(self.d1.pop(1, 'missing'), 'one')
self.assertEqual(self.d1.pop(1, 'missing'), 'missing')
# We don't know which item will be popped in popitem(), so we'll
# just check that the number of keys has decreased.
l = len(self.d1)
self.d1.popitem()
self.assertEqual(l - len(self.d1), 1)
def test_dict_equality(self):
d = SortedDict((i, i) for i in xrange(3))
self.assertEqual(d, {0: 0, 1: 1, 2: 2})
def test_tuple_init(self):
d = SortedDict(((1, "one"), (0, "zero"), (2, "two")))
self.assertEqual(repr(d), "{1: 'one', 0: 'zero', 2: 'two'}")
def test_pickle(self):
self.assertEqual(
pickle.loads(pickle.dumps(self.d1, 2)),
{7: 'seven', 1: 'one', 9: 'nine'}
)
def test_clear(self):
self.d1.clear()
self.assertEqual(self.d1, {})
self.assertEqual(self.d1.keyOrder, [])
class MergeDictTests(SimpleTestCase):
def test_simple_mergedict(self):
d1 = {'chris':'cool', 'camri':'cute', 'cotton':'adorable',
'tulip':'snuggable', 'twoofme':'firstone'}
d2 = {'chris2':'cool2', 'camri2':'cute2', 'cotton2':'adorable2',
'tulip2':'snuggable2'}
d3 = {'chris3':'cool3', 'camri3':'cute3', 'cotton3':'adorable3',
'tulip3':'snuggable3'}
d4 = {'twoofme': 'secondone'}
md = MergeDict(d1, d2, d3)
self.assertEqual(md['chris'], 'cool')
self.assertEqual(md['camri'], 'cute')
self.assertEqual(md['twoofme'], 'firstone')
md2 = md.copy()
self.assertEqual(md2['chris'], 'cool')
def test_mergedict_merges_multivaluedict(self):
""" MergeDict can merge MultiValueDicts """
multi1 = MultiValueDict({'key1': ['value1'],
'key2': ['value2', 'value3']})
multi2 = MultiValueDict({'key2': ['value4'],
'key4': ['value5', 'value6']})
mm = MergeDict(multi1, multi2)
# Although 'key2' appears in both dictionaries,
# only the first value is used.
self.assertEqual(mm.getlist('key2'), ['value2', 'value3'])
self.assertEqual(mm.getlist('key4'), ['value5', 'value6'])
self.assertEqual(mm.getlist('undefined'), [])
self.assertEqual(sorted(mm.keys()), ['key1', 'key2', 'key4'])
self.assertEqual(len(mm.values()), 3)
self.assertTrue('value1' in mm.values())
self.assertEqual(sorted(mm.items(), key=lambda k: k[0]),
[('key1', 'value1'), ('key2', 'value3'),
('key4', 'value6')])
self.assertEqual([(k,mm.getlist(k)) for k in sorted(mm)],
[('key1', ['value1']),
('key2', ['value2', 'value3']),
('key4', ['value5', 'value6'])])
class MultiValueDictTests(SimpleTestCase):
def test_multivaluedict(self):
d = MultiValueDict({'name': ['Adrian', 'Simon'],
'position': ['Developer']})
self.assertEqual(d['name'], 'Simon')
self.assertEqual(d.get('name'), 'Simon')
self.assertEqual(d.getlist('name'), ['Adrian', 'Simon'])
self.assertEqual(list(d.iteritems()),
[('position', 'Developer'), ('name', 'Simon')])
self.assertEqual(list(d.iterlists()),
[('position', ['Developer']),
('name', ['Adrian', 'Simon'])])
# MultiValueDictKeyError: "Key 'lastname' not found in
# <MultiValueDict: {'position': ['Developer'],
# 'name': ['Adrian', 'Simon']}>"
self.assertRaisesMessage(MultiValueDictKeyError,
'"Key \'lastname\' not found in <MultiValueDict: {\'position\':'\
' [\'Developer\'], \'name\': [\'Adrian\', \'Simon\']}>"',
d.__getitem__, 'lastname')
self.assertEqual(d.get('lastname'), None)
self.assertEqual(d.get('lastname', 'nonexistent'), 'nonexistent')
self.assertEqual(d.getlist('lastname'), [])
self.assertEqual(d.getlist('doesnotexist', ['Adrian', 'Simon']),
['Adrian', 'Simon'])
d.setlist('lastname', ['Holovaty', 'Willison'])
self.assertEqual(d.getlist('lastname'), ['Holovaty', 'Willison'])
self.assertEqual(d.values(), ['Developer', 'Simon', 'Willison'])
self.assertEqual(list(d.itervalues()),
['Developer', 'Simon', 'Willison'])
def test_copy(self):
for copy_func in [copy.copy, lambda d: d.copy()]:
d1 = MultiValueDict({
"developers": ["Carl", "Fred"]
})
self.assertEqual(d1["developers"], "Fred")
d2 = copy_func(d1)
d2.update({"developers": "Groucho"})
self.assertEqual(d2["developers"], "Groucho")
self.assertEqual(d1["developers"], "Fred")
d1 = MultiValueDict({
"key": [[]]
})
self.assertEqual(d1["key"], [])
d2 = copy_func(d1)
d2["key"].append("Penguin")
self.assertEqual(d1["key"], ["Penguin"])
self.assertEqual(d2["key"], ["Penguin"])
def test_dict_translation(self):
mvd = MultiValueDict({
'devs': ['Bob', 'Joe'],
'pm': ['Rory'],
})
d = mvd.dict()
self.assertEqual(d.keys(), mvd.keys())
for key in mvd.keys():
self.assertEqual(d[key], mvd[key])
self.assertEqual({}, MultiValueDict().dict())
class DotExpandedDictTests(SimpleTestCase):
def test_dotexpandeddict(self):
d = DotExpandedDict({'person.1.firstname': ['Simon'],
'person.1.lastname': ['Willison'],
'person.2.firstname': ['Adrian'],
'person.2.lastname': ['Holovaty']})
self.assertEqual(d['person']['1']['lastname'], ['Willison'])
self.assertEqual(d['person']['2']['lastname'], ['Holovaty'])
self.assertEqual(d['person']['2']['firstname'], ['Adrian'])
class ImmutableListTests(SimpleTestCase):
def test_sort(self):
d = ImmutableList(range(10))
# AttributeError: ImmutableList object is immutable.
self.assertRaisesMessage(AttributeError,
'ImmutableList object is immutable.', d.sort)
self.assertEqual(repr(d), '(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)')
def test_custom_warning(self):
d = ImmutableList(range(10), warning="Object is immutable!")
self.assertEqual(d[1], 1)
# AttributeError: Object is immutable!
self.assertRaisesMessage(AttributeError,
'Object is immutable!', d.__setitem__, 1, 'test')
class DictWrapperTests(SimpleTestCase):
def test_dictwrapper(self):
f = lambda x: "*%s" % x
d = DictWrapper({'a': 'a'}, f, 'xx_')
self.assertEqual("Normal: %(a)s. Modified: %(xx_a)s" % d,
'Normal: a. Modified: *a')