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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