Method _test_sparse_file

Lib/test/test_tarfile.py:1252–1262

(self, name)

    # an all platforms, and after that a test that will work only on
    # platforms/filesystems that prove to support sparse files.
    def _test_sparse_file(self, name):
        self.tar.extract(name, TEMPDIR, filter='data')
        filename = os.path.join(TEMPDIR, name)
        with open(filename, "rb") as fobj:
            data = fobj.read()
        self.assertEqual(sha256sum(data), sha256_sparse,
                "wrong sha256sum for %s" % name)

        if self._fs_supports_holes():
            s = os.stat(filename)
            self.assertLess(s.st_blocks * 512, s.st_size)

    def test_sparse_file_old(self):
        self._test_sparse_file("gnu/sparse")