def test_lru_basic():
lru = LRU(max_size=1)
repr(lru) # sanity
lru['hi'] = 0
lru['bye'] = 1
assert len(lru) == 1
lru['bye']
assert lru.get('hi') is None
del lru['bye']
assert 'bye' not in lru
assert len(lru) == 0
assert not lru
try:
lru.pop('bye')
except KeyError:
pass
else:
assert False
default = object()
assert lru.pop('bye', default) is default
try:
lru.popitem()
except KeyError:
pass
else:
assert False
lru['another'] = 1
assert lru.popitem() == ('another', 1)
lru['yet_another'] = 2
assert lru.pop('yet_another') == 2
lru['yet_another'] = 3
assert lru.pop('yet_another', default) == 3
lru['yet_another'] = 4
lru.clear()
assert not lru
lru['yet_another'] = 5
second_lru = LRU(max_size=1)
assert lru.copy() == lru
second_lru['yet_another'] = 5
assert second_lru == lru
assert lru == second_lru
lru.update(LRU(max_size=2, values=[('a', 1),
('b', 2)]))
assert len(lru) == 1
assert 'yet_another' not in lru
lru.setdefault('x', 2)
assert dict(lru) == {'x': 2}
lru.setdefault('x', 3)
assert dict(lru) == {'x': 2}
assert lru != second_lru
assert second_lru != lru
def test_lru_basic():
lru = LRU(max_size=1)
repr(lru) # sanity
lru['hi'] = 0
lru['bye'] = 1
assert len(lru) == 1
lru['bye']
assert lru.get('hi') is None
del lru['bye']
assert 'bye' not in lru
assert len(lru) == 0
assert not lru
try:
lru.pop('bye')
except KeyError:
pass
else:
assert False
default = object()
assert lru.pop('bye', default) is default
try:
lru.popitem()
except KeyError:
pass
else:
assert False
lru['another'] = 1
assert lru.popitem() == ('another', 1)
lru['yet_another'] = 2
assert lru.pop('yet_another') == 2
lru['yet_another'] = 3
assert lru.pop('yet_another', default) == 3
lru['yet_another'] = 4
lru.clear()
assert not lru
lru['yet_another'] = 5
second_lru = LRU(max_size=1)
assert lru.copy() == lru
second_lru['yet_another'] = 5
assert second_lru == lru
assert lru == second_lru
lru.update(LRU(max_size=2, values=[('a', 1), ('b', 2)]))
assert len(lru) == 1
assert 'yet_another' not in lru
lru.setdefault('x', 2)
assert dict(lru) == {'x': 2}
lru.setdefault('x', 3)
assert dict(lru) == {'x': 2}
assert lru != second_lru
assert second_lru != lru
def test_popitem_should_return_a_tuple():
cache = LRU()
cache['t'] = 42
assert cache.popitem() == ('t', 42)
