def test_respects_writable_mode_of_files(self, fs):
fs = MemoryFS()
write_file(fs, "file", u"foo")
fs.chmod("file", stat.S_IRUSR)
assert_file_content_equal(fs, "file", u"foo")
assert_open_raises(fs, "file", errno.EACCES, "a")
assert_open_raises(fs, "file", errno.EACCES, "w")
def test_unlink(self, fs):
write_file(fs, "file")
fs.unlink("file")
assert_open_raises(fs, "file", errno.ENOENT)
