contrib/python-zstandard/tests/test_estimate_sizes.py

githelp: clean up reflog help

This referenced commands that don't exist in core. The new help
isn't great since it references an experimental extension. But
it is better than nothing.

While we're here, also add test coverage.

Differential Revision: https://phab.mercurial-scm.org/D1727

try:
    import unittest2 as unittest
except ImportError:
    import unittest

import zstd

from . common import (
    make_cffi,
)


@make_cffi
class TestSizes(unittest.TestCase):
    def test_decompression_size(self):
        size = zstd.estimate_decompression_context_size()
        self.assertGreater(size, 100000)

    def test_compression_size(self):
        params = zstd.get_compression_parameters(3)
        size = zstd.estimate_compression_context_size(params)
        self.assertGreater(size, 100000)