def test_zip_extract_ro(self):
    src = os.path.join(self.tmp, "src")
    os.mkdir(src)
    # Create a empty dir called a, and two files named
    # b and c
    a = os.path.join(src, "a")
    os.mkdir(a)
    ro = os.path.join(a, "ro")
    with open(ro, "w") as fp:
        fp.write("ro\n")
    # 200:
    os.chmod(ro, stat.S_IRUSR)
    archive = qibuild.archive.zip(a)
    dest = os.path.join(self.tmp, "dest")
    os.mkdir(dest)
    qibuild.archive.extract(archive, dest)
    ls_r = qibuild.sh.ls_r(dest)
    self.assertEquals(ls_r, ["a/ro"])
    dest_ro = os.path.join(dest, "a", "ro")
    # check that the dest is readonly:
    error = None
    try:
        open(dest_ro, "w")
    except IOError as e:
        error = e
    self.assertFalse(error is None)
    self.assertEquals(error.errno,  errno.EACCES)