Mercurial > hg
view tests/test-cappedreader.py @ 47349:7138c863d0a1
dirstate-v2: Skip readdir in status based on directory mtime
When calling `read_dir` during `status` and the directory is found to be
eligible for caching (see code comments), write the directory’s mtime to the
dirstate. The presence of a directory mtime in the dirstate is meaningful
and indicates eligibility.
When an eligible directory mtime is found in the dirstate and `stat()` shows
that the mtime has not changed, `status` can skip calling `read_dir` again
and instead rely on the names of child nodes in the dirstate tree.
The `tempfile` crate is used to create a temporary file in order to use its
modification time as "current time" with the same truncation as other files
and directories would have in their own modification time.
Differential Revision: https://phab.mercurial-scm.org/D10826
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Fri, 28 May 2021 11:48:59 +0200 |
parents | 2372284d9457 |
children | 6000f5b25c9b |
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from __future__ import absolute_import, print_function import io import unittest from mercurial import util class CappedReaderTests(unittest.TestCase): def testreadfull(self): source = io.BytesIO(b'x' * 100) reader = util.cappedreader(source, 10) res = reader.read(10) self.assertEqual(res, b'x' * 10) self.assertEqual(source.tell(), 10) source.seek(0) reader = util.cappedreader(source, 15) res = reader.read(16) self.assertEqual(res, b'x' * 15) self.assertEqual(source.tell(), 15) source.seek(0) reader = util.cappedreader(source, 100) res = reader.read(100) self.assertEqual(res, b'x' * 100) self.assertEqual(source.tell(), 100) source.seek(0) reader = util.cappedreader(source, 50) res = reader.read() self.assertEqual(res, b'x' * 50) self.assertEqual(source.tell(), 50) source.seek(0) def testreadnegative(self): source = io.BytesIO(b'x' * 100) reader = util.cappedreader(source, 20) res = reader.read(-1) self.assertEqual(res, b'x' * 20) self.assertEqual(source.tell(), 20) source.seek(0) reader = util.cappedreader(source, 100) res = reader.read(-1) self.assertEqual(res, b'x' * 100) self.assertEqual(source.tell(), 100) source.seek(0) def testreadmultiple(self): source = io.BytesIO(b'x' * 100) reader = util.cappedreader(source, 10) for i in range(10): res = reader.read(1) self.assertEqual(res, b'x') self.assertEqual(source.tell(), i + 1) self.assertEqual(source.tell(), 10) res = reader.read(1) self.assertEqual(res, b'') self.assertEqual(source.tell(), 10) source.seek(0) reader = util.cappedreader(source, 45) for i in range(4): res = reader.read(10) self.assertEqual(res, b'x' * 10) self.assertEqual(source.tell(), (i + 1) * 10) res = reader.read(10) self.assertEqual(res, b'x' * 5) self.assertEqual(source.tell(), 45) def readlimitpasteof(self): source = io.BytesIO(b'x' * 100) reader = util.cappedreader(source, 1024) res = reader.read(1000) self.assertEqual(res, b'x' * 100) self.assertEqual(source.tell(), 100) res = reader.read(1000) self.assertEqual(res, b'') self.assertEqual(source.tell(), 100) if __name__ == '__main__': import silenttestrunner silenttestrunner.main(__name__)