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from .lib import TestBase, FileCreator
from smmap.util import ( MapWindow, MapRegion, MapRegionList, ALLOCATIONGRANULARITY, is_64_bit, align_to_mmap )
import os import sys
class TestMMan(TestBase):
def test_window(self): wl = MapWindow(0, 1) # left wc = MapWindow(1, 1) # center wc2 = MapWindow(10, 5) # another center wr = MapWindow(8000, 50) # right
assert wl.ofs_end() == 1 assert wc.ofs_end() == 2 assert wr.ofs_end() == 8050
# extension does nothing if already in place maxsize = 100 wc.extend_left_to(wl, maxsize) assert wc.ofs == 1 and wc.size == 1 wl.extend_right_to(wc, maxsize) wl.extend_right_to(wc, maxsize) assert wl.ofs == 0 and wl.size == 1
# an actual left extension pofs_end = wc2.ofs_end() wc2.extend_left_to(wc, maxsize) assert wc2.ofs == wc.ofs_end() and pofs_end == wc2.ofs_end()
# respects maxsize wc.extend_right_to(wr, maxsize) assert wc.ofs == 1 and wc.size == maxsize wc.extend_right_to(wr, maxsize) assert wc.ofs == 1 and wc.size == maxsize
# without maxsize wc.extend_right_to(wr, sys.maxsize) assert wc.ofs_end() == wr.ofs and wc.ofs == 1
# extend left wr.extend_left_to(wc2, maxsize) wr.extend_left_to(wc2, maxsize) assert wr.size == maxsize
wr.extend_left_to(wc2, sys.maxsize) assert wr.ofs == wc2.ofs_end()
wc.align() assert wc.ofs == 0 and wc.size == align_to_mmap(wc.size, True)
def test_region(self): with FileCreator(self.k_window_test_size, "window_test") as fc: half_size = fc.size // 2 rofs = align_to_mmap(4200, False) rfull = MapRegion(fc.path, 0, fc.size) rhalfofs = MapRegion(fc.path, rofs, fc.size) rhalfsize = MapRegion(fc.path, 0, half_size)
# offsets assert rfull.ofs_begin() == 0 and rfull.size() == fc.size assert rfull.ofs_end() == fc.size # if this method works, it works always
assert rhalfofs.ofs_begin() == rofs and rhalfofs.size() == fc.size - rofs assert rhalfsize.ofs_begin() == 0 and rhalfsize.size() == half_size
assert rfull.includes_ofs(0) and rfull.includes_ofs(fc.size - 1) and rfull.includes_ofs(half_size) assert not rfull.includes_ofs(-1) and not rfull.includes_ofs(sys.maxsize)
# auto-refcount assert rfull.client_count() == 1 rfull2 = rfull assert rfull.client_count() == 1, "no auto-counting"
# window constructor w = MapWindow.from_region(rfull) assert w.ofs == rfull.ofs_begin() and w.ofs_end() == rfull.ofs_end()
def test_region_list(self): with FileCreator(100, "sample_file") as fc: fd = os.open(fc.path, os.O_RDONLY) try: for item in (fc.path, fd): ml = MapRegionList(item)
assert len(ml) == 0 assert ml.path_or_fd() == item assert ml.file_size() == fc.size finally: os.close(fd)
def test_util(self): assert isinstance(is_64_bit(), bool) # just call it assert align_to_mmap(1, False) == 0 assert align_to_mmap(1, True) == ALLOCATIONGRANULARITY
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