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from rpython.rlib.buffer import *
from rpython.annotator.annrpython import RPythonAnnotator
from rpython.annotator.model import SomeInteger
def test_string_buffer():
buf = StringBuffer('hello world')
assert buf.getitem(4) == 'o'
assert buf.getitem(4) == buf[4]
assert buf.getlength() == 11
assert buf.getlength() == len(buf)
assert buf.getslice(1, 6, 1, 5) == 'ello '
assert buf.getslice(1, 6, 1, 5) == buf[1:6]
assert buf.getslice(1, 6, 2, 3) == 'el '
assert buf.as_str() == 'hello world'
def test_len_nonneg():
# This test needs a buffer subclass whose getlength() isn't guaranteed to
# return a non-neg integer.
class DummyBuffer(Buffer):
def __init__(self, s):
self.size = s
def getlength(self):
return self.size
def func(n):
buf = DummyBuffer(n)
return len(buf)
a = RPythonAnnotator()
s = a.build_types(func, [int])
assert s == SomeInteger(nonneg=True)
def test_as_str_and_offset_maybe():
buf = StringBuffer('hello world')
assert buf.as_str_and_offset_maybe() == ('hello world', 0)
#
sbuf = SubBuffer(buf, 6, 5)
assert sbuf.getslice(0, 5, 1, 5) == 'world'
assert sbuf.as_str_and_offset_maybe() == ('hello world', 6)
#
ssbuf = SubBuffer(sbuf, 3, 2)
assert ssbuf.getslice(0, 2, 1, 2) == 'ld'
assert ssbuf.as_str_and_offset_maybe() == ('hello world', 9)
#
ss2buf = SubBuffer(sbuf, 1, -1)
assert ss2buf.as_str() == 'orld'
assert ss2buf.getlength() == 4
ss3buf = SubBuffer(ss2buf, 1, -1)
assert ss3buf.as_str() == 'rld'
assert ss3buf.getlength() == 3
#
ss4buf = SubBuffer(buf, 3, 4)
assert ss4buf.as_str() == 'lo w'
ss5buf = SubBuffer(ss4buf, 1, -1)
assert ss5buf.as_str() == 'o w'
assert ss5buf.getlength() == 3
def test_repeated_subbuffer():
buf = StringBuffer('x' * 10000)
for i in range(9999, 9, -1):
buf = SubBuffer(buf, 1, i)
assert buf.getlength() == 10
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