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"Test sortedcollections.OrderedDict"
import pickle
import pytest
from sortedcollections import OrderedDict
pairs = dict(enumerate(range(10)))
def test_init():
od = OrderedDict()
assert len(od) == 0
od._check()
od = OrderedDict(enumerate(range(10)))
assert len(od) == 10
od._check()
od = OrderedDict(a=0, b=1, c=2)
assert len(od) == 3
od._check()
od = OrderedDict(pairs)
assert len(od) == 10
od._check()
def test_setitem():
od = OrderedDict()
od['alice'] = 0
od['bob'] = 1
od['carol'] = 2
assert len(od) == 3
od['carol'] = 2
assert len(od) == 3
od._check()
def test_delitem():
od = OrderedDict(pairs)
assert len(od) == 10
for value in range(10):
del od[value]
assert len(od) == 0
od._check()
def test_iter_reversed():
od = OrderedDict([('b', 0), ('a', 1), ('c', 2)])
assert list(od) == ['b', 'a', 'c']
assert list(reversed(od)) == ['c', 'a', 'b']
od._check()
def test_clear():
od = OrderedDict(pairs)
assert len(od) == 10
od.clear()
assert len(od) == 0
od._check()
def test_popitem():
od = OrderedDict(enumerate(range(10)))
for num in reversed(range(10)):
key, value = od.popitem()
assert num == key == value
od._check()
od = OrderedDict(enumerate(range(10)))
for num in range(10):
key, value = od.popitem(last=False)
assert num == key == value
od._check()
def test_keys():
od = OrderedDict(enumerate(range(10)))
assert list(reversed(od.keys())) == list(reversed(range(10)))
assert od.keys()[:3] == [0, 1, 2]
od._check()
def test_items():
items = list(enumerate(range(10)))
od = OrderedDict(enumerate(range(10)))
assert list(reversed(od.items())) == list(reversed(items))
assert od.items()[:3] == [(0, 0), (1, 1), (2, 2)]
od._check()
def test_values():
od = OrderedDict(enumerate(range(10)))
assert list(reversed(od.values())) == list(reversed(range(10)))
assert od.values()[:3] == [0, 1, 2]
od._check()
def test_iloc():
od = OrderedDict(enumerate(range(10)))
iloc = od.keys()
for num in range(10):
assert iloc[num] == num
iloc[-1] == 9
assert len(iloc) == 10
od._check()
def test_pop():
od = OrderedDict(enumerate(range(10)))
for num in range(10):
assert od.pop(num) == num
od._check()
assert od.pop(0, 'thing') == 'thing'
assert od.pop(1, default='thing') == 'thing'
od._check()
def test_pop_error():
od = OrderedDict()
with pytest.raises(KeyError):
od.pop(0)
def test_setdefault():
od = OrderedDict()
od.setdefault(0, False)
assert od[0] is False
od.setdefault(1, default=True)
assert od[1] is True
od.setdefault(2)
assert od[2] is None
assert od.setdefault(0) is False
assert od.setdefault(1) is True
def test_repr():
od = OrderedDict()
assert repr(od) == 'OrderedDict([])'
assert str(od) == 'OrderedDict([])'
def test_reduce():
od = OrderedDict(enumerate(range(10)))
data = pickle.dumps(od)
copy = pickle.loads(data)
assert od == copy
def test_copy():
od = OrderedDict(enumerate(range(10)))
copy = od.copy()
assert od == copy
def test_fromkeys():
od = OrderedDict.fromkeys('abc')
assert od == {'a': None, 'b': None, 'c': None}
od._check()
def test_equality():
od = OrderedDict.fromkeys('abc')
assert od == {'a': None, 'b': None, 'c': None}
assert od != {}
assert od != OrderedDict()
od._check()
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