mirror of https://github.com/python/cpython
573 lines
16 KiB
Python
573 lines
16 KiB
Python
from collections import deque
|
|
import unittest
|
|
from test import test_support
|
|
import copy
|
|
import cPickle as pickle
|
|
from cStringIO import StringIO
|
|
import random
|
|
|
|
BIG = 100000
|
|
|
|
class TestBasic(unittest.TestCase):
|
|
|
|
def test_basics(self):
|
|
d = deque(xrange(100))
|
|
d.__init__(xrange(100, 200))
|
|
for i in xrange(200, 400):
|
|
d.append(i)
|
|
for i in reversed(xrange(-200, 0)):
|
|
d.appendleft(i)
|
|
self.assertEqual(list(d), range(-200, 400))
|
|
self.assertEqual(len(d), 600)
|
|
|
|
left = [d.popleft() for i in xrange(250)]
|
|
self.assertEqual(left, range(-200, 50))
|
|
self.assertEqual(list(d), range(50, 400))
|
|
|
|
right = [d.pop() for i in xrange(250)]
|
|
right.reverse()
|
|
self.assertEqual(right, range(150, 400))
|
|
self.assertEqual(list(d), range(50, 150))
|
|
|
|
def test_comparisons(self):
|
|
d = deque('xabc'); d.popleft()
|
|
for e in [d, deque('abc'), deque('ab'), deque(), list(d)]:
|
|
self.assertEqual(d==e, type(d)==type(e) and list(d)==list(e))
|
|
self.assertEqual(d!=e, not(type(d)==type(e) and list(d)==list(e)))
|
|
|
|
args = map(deque, ('', 'a', 'b', 'ab', 'ba', 'abc', 'xba', 'xabc', 'cba'))
|
|
for x in args:
|
|
for y in args:
|
|
self.assertEqual(x == y, list(x) == list(y), (x,y))
|
|
self.assertEqual(x != y, list(x) != list(y), (x,y))
|
|
self.assertEqual(x < y, list(x) < list(y), (x,y))
|
|
self.assertEqual(x <= y, list(x) <= list(y), (x,y))
|
|
self.assertEqual(x > y, list(x) > list(y), (x,y))
|
|
self.assertEqual(x >= y, list(x) >= list(y), (x,y))
|
|
self.assertEqual(cmp(x,y), cmp(list(x),list(y)), (x,y))
|
|
|
|
def test_extend(self):
|
|
d = deque('a')
|
|
self.assertRaises(TypeError, d.extend, 1)
|
|
d.extend('bcd')
|
|
self.assertEqual(list(d), list('abcd'))
|
|
|
|
def test_extendleft(self):
|
|
d = deque('a')
|
|
self.assertRaises(TypeError, d.extendleft, 1)
|
|
d.extendleft('bcd')
|
|
self.assertEqual(list(d), list(reversed('abcd')))
|
|
|
|
def test_getitem(self):
|
|
n = 200
|
|
d = deque(xrange(n))
|
|
l = range(n)
|
|
for i in xrange(n):
|
|
d.popleft()
|
|
l.pop(0)
|
|
if random.random() < 0.5:
|
|
d.append(i)
|
|
l.append(i)
|
|
for j in xrange(1-len(l), len(l)):
|
|
assert d[j] == l[j]
|
|
|
|
d = deque('superman')
|
|
self.assertEqual(d[0], 's')
|
|
self.assertEqual(d[-1], 'n')
|
|
d = deque()
|
|
self.assertRaises(IndexError, d.__getitem__, 0)
|
|
self.assertRaises(IndexError, d.__getitem__, -1)
|
|
|
|
def test_setitem(self):
|
|
n = 200
|
|
d = deque(xrange(n))
|
|
for i in xrange(n):
|
|
d[i] = 10 * i
|
|
self.assertEqual(list(d), [10*i for i in xrange(n)])
|
|
l = list(d)
|
|
for i in xrange(1-n, 0, -1):
|
|
d[i] = 7*i
|
|
l[i] = 7*i
|
|
self.assertEqual(list(d), l)
|
|
|
|
def test_delitem(self):
|
|
n = 500 # O(n**2) test, don't make this too big
|
|
d = deque(xrange(n))
|
|
self.assertRaises(IndexError, d.__delitem__, -n-1)
|
|
self.assertRaises(IndexError, d.__delitem__, n)
|
|
for i in xrange(n):
|
|
self.assertEqual(len(d), n-i)
|
|
j = random.randrange(-len(d), len(d))
|
|
val = d[j]
|
|
self.assert_(val in d)
|
|
del d[j]
|
|
self.assert_(val not in d)
|
|
self.assertEqual(len(d), 0)
|
|
|
|
def test_rotate(self):
|
|
s = tuple('abcde')
|
|
n = len(s)
|
|
|
|
d = deque(s)
|
|
d.rotate(1) # verify rot(1)
|
|
self.assertEqual(''.join(d), 'eabcd')
|
|
|
|
d = deque(s)
|
|
d.rotate(-1) # verify rot(-1)
|
|
self.assertEqual(''.join(d), 'bcdea')
|
|
d.rotate() # check default to 1
|
|
self.assertEqual(tuple(d), s)
|
|
|
|
for i in xrange(n*3):
|
|
d = deque(s)
|
|
e = deque(d)
|
|
d.rotate(i) # check vs. rot(1) n times
|
|
for j in xrange(i):
|
|
e.rotate(1)
|
|
self.assertEqual(tuple(d), tuple(e))
|
|
d.rotate(-i) # check that it works in reverse
|
|
self.assertEqual(tuple(d), s)
|
|
e.rotate(n-i) # check that it wraps forward
|
|
self.assertEqual(tuple(e), s)
|
|
|
|
for i in xrange(n*3):
|
|
d = deque(s)
|
|
e = deque(d)
|
|
d.rotate(-i)
|
|
for j in xrange(i):
|
|
e.rotate(-1) # check vs. rot(-1) n times
|
|
self.assertEqual(tuple(d), tuple(e))
|
|
d.rotate(i) # check that it works in reverse
|
|
self.assertEqual(tuple(d), s)
|
|
e.rotate(i-n) # check that it wraps backaround
|
|
self.assertEqual(tuple(e), s)
|
|
|
|
d = deque(s)
|
|
e = deque(s)
|
|
e.rotate(BIG+17) # verify on long series of rotates
|
|
dr = d.rotate
|
|
for i in xrange(BIG+17):
|
|
dr()
|
|
self.assertEqual(tuple(d), tuple(e))
|
|
|
|
def test_len(self):
|
|
d = deque('ab')
|
|
self.assertEqual(len(d), 2)
|
|
d.popleft()
|
|
self.assertEqual(len(d), 1)
|
|
d.pop()
|
|
self.assertEqual(len(d), 0)
|
|
self.assertRaises(IndexError, d.pop)
|
|
self.assertEqual(len(d), 0)
|
|
d.append('c')
|
|
self.assertEqual(len(d), 1)
|
|
d.appendleft('d')
|
|
self.assertEqual(len(d), 2)
|
|
d.clear()
|
|
self.assertEqual(len(d), 0)
|
|
|
|
def test_underflow(self):
|
|
d = deque()
|
|
self.assertRaises(IndexError, d.pop)
|
|
self.assertRaises(IndexError, d.popleft)
|
|
|
|
def test_clear(self):
|
|
d = deque(xrange(100))
|
|
self.assertEqual(len(d), 100)
|
|
d.clear()
|
|
self.assertEqual(len(d), 0)
|
|
self.assertEqual(list(d), [])
|
|
|
|
def test_repr(self):
|
|
d = deque(xrange(200))
|
|
e = eval(repr(d))
|
|
self.assertEqual(list(d), list(e))
|
|
d.append(d)
|
|
self.assert_('...' in repr(d))
|
|
|
|
def test_print(self):
|
|
d = deque(xrange(200))
|
|
d.append(d)
|
|
f = StringIO()
|
|
print >> f, d,
|
|
self.assertEqual(f.getvalue(), repr(d))
|
|
f.close()
|
|
|
|
def test_hash(self):
|
|
self.assertRaises(TypeError, hash, deque('abc'))
|
|
|
|
def test_long_steadystate_queue_popleft(self):
|
|
for size in (0, 1, 2, 100, 1000):
|
|
d = deque(xrange(size))
|
|
append, pop = d.append, d.popleft
|
|
for i in xrange(size, BIG):
|
|
append(i)
|
|
x = pop()
|
|
if x != i - size:
|
|
self.assertEqual(x, i-size)
|
|
self.assertEqual(list(d), range(BIG-size, BIG))
|
|
|
|
def test_long_steadystate_queue_popright(self):
|
|
for size in (0, 1, 2, 100, 1000):
|
|
d = deque(reversed(xrange(size)))
|
|
append, pop = d.appendleft, d.pop
|
|
for i in xrange(size, BIG):
|
|
append(i)
|
|
x = pop()
|
|
if x != i - size:
|
|
self.assertEqual(x, i-size)
|
|
self.assertEqual(list(reversed(list(d))), range(BIG-size, BIG))
|
|
|
|
def test_big_queue_popleft(self):
|
|
pass
|
|
d = deque()
|
|
append, pop = d.append, d.popleft
|
|
for i in xrange(BIG):
|
|
append(i)
|
|
for i in xrange(BIG):
|
|
x = pop()
|
|
if x != i:
|
|
self.assertEqual(x, i)
|
|
|
|
def test_big_queue_popright(self):
|
|
d = deque()
|
|
append, pop = d.appendleft, d.pop
|
|
for i in xrange(BIG):
|
|
append(i)
|
|
for i in xrange(BIG):
|
|
x = pop()
|
|
if x != i:
|
|
self.assertEqual(x, i)
|
|
|
|
def test_big_stack_right(self):
|
|
d = deque()
|
|
append, pop = d.append, d.pop
|
|
for i in xrange(BIG):
|
|
append(i)
|
|
for i in reversed(xrange(BIG)):
|
|
x = pop()
|
|
if x != i:
|
|
self.assertEqual(x, i)
|
|
self.assertEqual(len(d), 0)
|
|
|
|
def test_big_stack_left(self):
|
|
d = deque()
|
|
append, pop = d.appendleft, d.popleft
|
|
for i in xrange(BIG):
|
|
append(i)
|
|
for i in reversed(xrange(BIG)):
|
|
x = pop()
|
|
if x != i:
|
|
self.assertEqual(x, i)
|
|
self.assertEqual(len(d), 0)
|
|
|
|
def test_roundtrip_iter_init(self):
|
|
d = deque(xrange(200))
|
|
e = deque(d)
|
|
self.assertNotEqual(id(d), id(e))
|
|
self.assertEqual(list(d), list(e))
|
|
|
|
def test_pickle(self):
|
|
d = deque(xrange(200))
|
|
s = pickle.dumps(d)
|
|
e = pickle.loads(s)
|
|
self.assertNotEqual(id(d), id(e))
|
|
self.assertEqual(list(d), list(e))
|
|
|
|
def test_deepcopy(self):
|
|
mut = [10]
|
|
d = deque([mut])
|
|
e = copy.deepcopy(d)
|
|
self.assertEqual(list(d), list(e))
|
|
mut[0] = 11
|
|
self.assertNotEqual(id(d), id(e))
|
|
self.assertNotEqual(list(d), list(e))
|
|
|
|
def test_copy(self):
|
|
mut = [10]
|
|
d = deque([mut])
|
|
e = copy.copy(d)
|
|
self.assertEqual(list(d), list(e))
|
|
mut[0] = 11
|
|
self.assertNotEqual(id(d), id(e))
|
|
self.assertEqual(list(d), list(e))
|
|
|
|
def test_reversed(self):
|
|
for s in ('abcd', xrange(2000)):
|
|
self.assertEqual(list(reversed(deque(s))), list(reversed(s)))
|
|
|
|
def R(seqn):
|
|
'Regular generator'
|
|
for i in seqn:
|
|
yield i
|
|
|
|
class G:
|
|
'Sequence using __getitem__'
|
|
def __init__(self, seqn):
|
|
self.seqn = seqn
|
|
def __getitem__(self, i):
|
|
return self.seqn[i]
|
|
|
|
class I:
|
|
'Sequence using iterator protocol'
|
|
def __init__(self, seqn):
|
|
self.seqn = seqn
|
|
self.i = 0
|
|
def __iter__(self):
|
|
return self
|
|
def next(self):
|
|
if self.i >= len(self.seqn): raise StopIteration
|
|
v = self.seqn[self.i]
|
|
self.i += 1
|
|
return v
|
|
|
|
class Ig:
|
|
'Sequence using iterator protocol defined with a generator'
|
|
def __init__(self, seqn):
|
|
self.seqn = seqn
|
|
self.i = 0
|
|
def __iter__(self):
|
|
for val in self.seqn:
|
|
yield val
|
|
|
|
class X:
|
|
'Missing __getitem__ and __iter__'
|
|
def __init__(self, seqn):
|
|
self.seqn = seqn
|
|
self.i = 0
|
|
def next(self):
|
|
if self.i >= len(self.seqn): raise StopIteration
|
|
v = self.seqn[self.i]
|
|
self.i += 1
|
|
return v
|
|
|
|
class N:
|
|
'Iterator missing next()'
|
|
def __init__(self, seqn):
|
|
self.seqn = seqn
|
|
self.i = 0
|
|
def __iter__(self):
|
|
return self
|
|
|
|
class E:
|
|
'Test propagation of exceptions'
|
|
def __init__(self, seqn):
|
|
self.seqn = seqn
|
|
self.i = 0
|
|
def __iter__(self):
|
|
return self
|
|
def next(self):
|
|
3/0
|
|
|
|
class S:
|
|
'Test immediate stop'
|
|
def __init__(self, seqn):
|
|
pass
|
|
def __iter__(self):
|
|
return self
|
|
def next(self):
|
|
raise StopIteration
|
|
|
|
from itertools import chain, imap
|
|
def L(seqn):
|
|
'Test multiple tiers of iterators'
|
|
return chain(imap(lambda x:x, R(Ig(G(seqn)))))
|
|
|
|
|
|
class TestVariousIteratorArgs(unittest.TestCase):
|
|
|
|
def test_constructor(self):
|
|
for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
|
|
for g in (G, I, Ig, S, L, R):
|
|
self.assertEqual(list(deque(g(s))), list(g(s)))
|
|
self.assertRaises(TypeError, deque, X(s))
|
|
self.assertRaises(TypeError, deque, N(s))
|
|
self.assertRaises(ZeroDivisionError, deque, E(s))
|
|
|
|
def test_iter_with_altered_data(self):
|
|
d = deque('abcdefg')
|
|
it = iter(d)
|
|
d.pop()
|
|
self.assertRaises(RuntimeError, it.next)
|
|
|
|
class Deque(deque):
|
|
pass
|
|
|
|
class TestSubclass(unittest.TestCase):
|
|
|
|
def test_basics(self):
|
|
d = Deque(xrange(100))
|
|
d.__init__(xrange(100, 200))
|
|
for i in xrange(200, 400):
|
|
d.append(i)
|
|
for i in reversed(xrange(-200, 0)):
|
|
d.appendleft(i)
|
|
self.assertEqual(list(d), range(-200, 400))
|
|
self.assertEqual(len(d), 600)
|
|
|
|
left = [d.popleft() for i in xrange(250)]
|
|
self.assertEqual(left, range(-200, 50))
|
|
self.assertEqual(list(d), range(50, 400))
|
|
|
|
right = [d.pop() for i in xrange(250)]
|
|
right.reverse()
|
|
self.assertEqual(right, range(150, 400))
|
|
self.assertEqual(list(d), range(50, 150))
|
|
|
|
d.clear()
|
|
self.assertEqual(len(d), 0)
|
|
|
|
def test_copy_pickle(self):
|
|
|
|
d = Deque('abc')
|
|
|
|
e = d.__copy__()
|
|
self.assertEqual(type(d), type(e))
|
|
self.assertEqual(list(d), list(e))
|
|
|
|
e = Deque(d)
|
|
self.assertEqual(type(d), type(e))
|
|
self.assertEqual(list(d), list(e))
|
|
|
|
s = pickle.dumps(d)
|
|
e = pickle.loads(s)
|
|
self.assertNotEqual(id(d), id(e))
|
|
self.assertEqual(type(d), type(e))
|
|
self.assertEqual(list(d), list(e))
|
|
|
|
|
|
#==============================================================================
|
|
|
|
libreftest = """
|
|
Example from the Library Reference: Doc/lib/libcollections.tex
|
|
|
|
>>> from collections import deque
|
|
>>> d = deque('ghi') # make a new deque with three items
|
|
>>> for elem in d: # iterate over the deque's elements
|
|
... print elem.upper()
|
|
G
|
|
H
|
|
I
|
|
>>> d.append('j') # add a new entry to the right side
|
|
>>> d.appendleft('f') # add a new entry to the left side
|
|
>>> d # show the representation of the deque
|
|
deque(['f', 'g', 'h', 'i', 'j'])
|
|
>>> d.pop() # return and remove the rightmost item
|
|
'j'
|
|
>>> d.popleft() # return and remove the leftmost item
|
|
'f'
|
|
>>> list(d) # list the contents of the deque
|
|
['g', 'h', 'i']
|
|
>>> d[0] # peek at leftmost item
|
|
'g'
|
|
>>> d[-1] # peek at rightmost item
|
|
'i'
|
|
>>> list(reversed(d)) # list the contents of a deque in reverse
|
|
['i', 'h', 'g']
|
|
>>> 'h' in d # search the deque
|
|
True
|
|
>>> d.extend('jkl') # add multiple elements at once
|
|
>>> d
|
|
deque(['g', 'h', 'i', 'j', 'k', 'l'])
|
|
>>> d.rotate(1) # right rotation
|
|
>>> d
|
|
deque(['l', 'g', 'h', 'i', 'j', 'k'])
|
|
>>> d.rotate(-1) # left rotation
|
|
>>> d
|
|
deque(['g', 'h', 'i', 'j', 'k', 'l'])
|
|
>>> deque(reversed(d)) # make a new deque in reverse order
|
|
deque(['l', 'k', 'j', 'i', 'h', 'g'])
|
|
>>> d.clear() # empty the deque
|
|
>>> d.pop() # cannot pop from an empty deque
|
|
Traceback (most recent call last):
|
|
File "<pyshell#6>", line 1, in -toplevel-
|
|
d.pop()
|
|
IndexError: pop from an empty deque
|
|
|
|
>>> d.extendleft('abc') # extendleft() reverses the input order
|
|
>>> d
|
|
deque(['c', 'b', 'a'])
|
|
|
|
|
|
|
|
>>> def delete_nth(d, n):
|
|
... d.rotate(-n)
|
|
... d.popleft()
|
|
... d.rotate(n)
|
|
...
|
|
>>> d = deque('abcdef')
|
|
>>> delete_nth(d, 2) # remove the entry at d[2]
|
|
>>> d
|
|
deque(['a', 'b', 'd', 'e', 'f'])
|
|
|
|
|
|
|
|
>>> def roundrobin(*iterables):
|
|
... pending = deque(iter(i) for i in iterables)
|
|
... while pending:
|
|
... task = pending.popleft()
|
|
... try:
|
|
... yield task.next()
|
|
... except StopIteration:
|
|
... continue
|
|
... pending.append(task)
|
|
...
|
|
|
|
>>> for value in roundrobin('abc', 'd', 'efgh'):
|
|
... print value
|
|
...
|
|
a
|
|
d
|
|
e
|
|
b
|
|
f
|
|
c
|
|
g
|
|
h
|
|
|
|
|
|
>>> def maketree(iterable):
|
|
... d = deque(iterable)
|
|
... while len(d) > 1:
|
|
... pair = [d.popleft(), d.popleft()]
|
|
... d.append(pair)
|
|
... return list(d)
|
|
...
|
|
>>> print maketree('abcdefgh')
|
|
[[[['a', 'b'], ['c', 'd']], [['e', 'f'], ['g', 'h']]]]
|
|
|
|
"""
|
|
|
|
|
|
#==============================================================================
|
|
|
|
__test__ = {'libreftest' : libreftest}
|
|
|
|
def test_main(verbose=None):
|
|
import sys
|
|
from test import test_sets
|
|
test_classes = (
|
|
TestBasic,
|
|
TestVariousIteratorArgs,
|
|
TestSubclass,
|
|
)
|
|
|
|
test_support.run_unittest(*test_classes)
|
|
|
|
# verify reference counting
|
|
if verbose and hasattr(sys, "gettotalrefcount"):
|
|
import gc
|
|
counts = [None] * 5
|
|
for i in xrange(len(counts)):
|
|
test_support.run_unittest(*test_classes)
|
|
gc.collect()
|
|
counts[i] = sys.gettotalrefcount()
|
|
print counts
|
|
|
|
# doctests
|
|
from test import test_deque
|
|
test_support.run_doctest(test_deque, verbose)
|
|
|
|
if __name__ == "__main__":
|
|
test_main(verbose=True)
|