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"""
Tests for stuff in django.utils.datastructures.
"""
import pickle
import unittest
from django.utils.datastructures import *
class DatastructuresTestCase(unittest.TestCase):
def assertRaisesErrorWithMessage(self, error, message, callable,
*args, **kwargs):
self.assertRaises(error, callable, *args, **kwargs)
try:
callable(*args, **kwargs)
except error, e:
self.assertEqual(message, str(e))
class SortedDictTests(DatastructuresTestCase):
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.assertEquals(self.d1.keys(), [7, 1, 9])
self.assertEquals(self.d1.values(), ['seven', 'one', 'nine'])
self.assertEquals(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.assertEquals(self.d1.values(), ['seven', 'ONE', 'nine'])
def test_append_items(self):
""" New items go to the end. """
self.d1[0] = 'nil'
self.assertEquals(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.assertEquals(self.d2.keys(), [1, 9, 0])
self.d2[7] = 'lucky number 7'
self.assertEquals(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.assertEquals(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.assertEquals(d.keys(), [2, 1])
real_dict = dict(tuples)
self.assertEquals(sorted(real_dict.values()), ['one', 'second-two'])
# Here the order of SortedDict values *is* what we are testing
self.assertEquals(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.assertEquals(
repr(self.d1),
"{7: 'seven', 1: 'one', 9: 'nine', 13: 'thirteen'}"
)
def test_pop(self):
self.assertEquals(self.d1.pop(1, 'missing'), 'one')
self.assertEquals(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.assertEquals(l - len(self.d1), 1)
def test_dict_equality(self):
d = SortedDict((i, i) for i in xrange(3))
self.assertEquals(d, {0: 0, 1: 1, 2: 2})
def test_tuple_init(self):
d = SortedDict(((1, "one"), (0, "zero"), (2, "two")))
self.assertEquals(repr(d), "{1: 'one', 0: 'zero', 2: 'two'}")
def test_pickle(self):
self.assertEquals(
pickle.loads(pickle.dumps(self.d1, 2)),
{7: 'seven', 1: 'one', 9: 'nine'}
)
def test_clear(self):
self.d1.clear()
self.assertEquals(self.d1, {})
self.assertEquals(self.d1.keyOrder, [])
class MergeDictTests(DatastructuresTestCase):
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.assertEquals(md['chris'], 'cool')
self.assertEquals(md['camri'], 'cute')
self.assertEquals(md['twoofme'], 'firstone')
md2 = md.copy()
self.assertEquals(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.assertEquals(mm.getlist('key2'), ['value2', 'value3'])
self.assertEquals(mm.getlist('key4'), ['value5', 'value6'])
self.assertEquals(mm.getlist('undefined'), [])
self.assertEquals(sorted(mm.keys()), ['key1', 'key2', 'key4'])
self.assertEquals(len(mm.values()), 3)
self.assertTrue('value1' in mm.values())
self.assertEquals(sorted(mm.items(), key=lambda k: k[0]),
[('key1', 'value1'), ('key2', 'value3'),
('key4', 'value6')])
self.assertEquals([(k,mm.getlist(k)) for k in sorted(mm)],
[('key1', ['value1']),
('key2', ['value2', 'value3']),
('key4', ['value5', 'value6'])])
class MultiValueDictTests(DatastructuresTestCase):
def test_multivaluedict(self):
d = MultiValueDict({'name': ['Adrian', 'Simon'],
'position': ['Developer']})
self.assertEquals(d['name'], 'Simon')
self.assertEquals(d.get('name'), 'Simon')
self.assertEquals(d.getlist('name'), ['Adrian', 'Simon'])
self.assertEquals(list(d.iteritems()),
[('position', 'Developer'), ('name', 'Simon')])
self.assertEquals(list(d.iterlists()),
[('position', ['Developer']),
('name', ['Adrian', 'Simon'])])
# MultiValueDictKeyError: "Key 'lastname' not found in
# <MultiValueDict: {'position': ['Developer'],
# 'name': ['Adrian', 'Simon']}>"
self.assertRaisesErrorWithMessage(MultiValueDictKeyError,
'"Key \'lastname\' not found in <MultiValueDict: {\'position\':'\
' [\'Developer\'], \'name\': [\'Adrian\', \'Simon\']}>"',
d.__getitem__, 'lastname')
self.assertEquals(d.get('lastname'), None)
self.assertEquals(d.get('lastname', 'nonexistent'), 'nonexistent')
self.assertEquals(d.getlist('lastname'), [])
d.setlist('lastname', ['Holovaty', 'Willison'])
self.assertEquals(d.getlist('lastname'), ['Holovaty', 'Willison'])
self.assertEquals(d.values(), ['Developer', 'Simon', 'Willison'])
self.assertEquals(list(d.itervalues()),
['Developer', 'Simon', 'Willison'])
class DotExpandedDictTests(DatastructuresTestCase):
def test_dotexpandeddict(self):
d = DotExpandedDict({'person.1.firstname': ['Simon'],
'person.1.lastname': ['Willison'],
'person.2.firstname': ['Adrian'],
'person.2.lastname': ['Holovaty']})
self.assertEquals(d['person']['1']['lastname'], ['Willison'])
self.assertEquals(d['person']['2']['lastname'], ['Holovaty'])
self.assertEquals(d['person']['2']['firstname'], ['Adrian'])
class ImmutableListTests(DatastructuresTestCase):
def test_sort(self):
d = ImmutableList(range(10))
# AttributeError: ImmutableList object is immutable.
self.assertRaisesErrorWithMessage(AttributeError,
'ImmutableList object is immutable.', d.sort)
self.assertEquals(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.assertEquals(d[1], 1)
# AttributeError: Object is immutable!
self.assertRaisesErrorWithMessage(AttributeError,
'Object is immutable!', d.__setitem__, 1, 'test')
class DictWrapperTests(DatastructuresTestCase):
def test_dictwrapper(self):
f = lambda x: "*%s" % x
d = DictWrapper({'a': 'a'}, f, 'xx_')
self.assertEquals("Normal: %(a)s. Modified: %(xx_a)s" % d,
'Normal: a. Modified: *a')
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