view tests/test-hg-parseurl.py @ 49568:da48f170d203

rust-status: query fs traversal metadata lazily

Currently, any time the status algorithm needs to read a directory from the
filesystem (because the stat-only optimization is not available), it also
stats each directory entry eagerly.

Stat'ing the entries is only needed in a few cases (like when checking
the mtime of a directory for caching): this patch creates a wrapper struct
`DirEntry` that only stats the directory entry it represents when needed.

Excerpt of an `strace` before this change on Mozilla Central:

```
openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=3540, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x55dc970bd440 /* 139 entries */, 32768) = 5072
statx(3, ".hg", AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_ALL, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=772, ...}) = 0

[... 135 other successful `statx` calls]

getdents64(3, 0x55dc970bd440 /* 0 entries */, 32768) = 0
close(3)                                = 0
```

After this change:

```
openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=3540, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x561567c10190 /* 139 entries */, 32768) = 5072
getdents64(3, 0x561567c10190 /* 0 entries */, 32768) = 0
close(3)                                = 0
```

import unittest

from mercurial.utils import urlutil


class ParseRequestTests(unittest.TestCase):
    def testparse(self):

        self.assertEqual(
            urlutil.parseurl(b'http://example.com/no/anchor'),
            (b'http://example.com/no/anchor', (None, [])),
        )
        self.assertEqual(
            urlutil.parseurl(b'http://example.com/an/anchor#foo'),
            (b'http://example.com/an/anchor', (b'foo', [])),
        )
        self.assertEqual(
            urlutil.parseurl(
                b'http://example.com/no/anchor/branches', [b'foo']
            ),
            (b'http://example.com/no/anchor/branches', (None, [b'foo'])),
        )
        self.assertEqual(
            urlutil.parseurl(
                b'http://example.com/an/anchor/branches#bar', [b'foo']
            ),
            (b'http://example.com/an/anchor/branches', (b'bar', [b'foo'])),
        )
        self.assertEqual(
            urlutil.parseurl(
                b'http://example.com/an/anchor/branches-None#foo', None
            ),
            (b'http://example.com/an/anchor/branches-None', (b'foo', [])),
        )
        self.assertEqual(
            urlutil.parseurl(b'http://example.com/'),
            (b'http://example.com/', (None, [])),
        )
        self.assertEqual(
            urlutil.parseurl(b'http://example.com'),
            (b'http://example.com/', (None, [])),
        )
        self.assertEqual(
            urlutil.parseurl(b'http://example.com#foo'),
            (b'http://example.com/', (b'foo', [])),
        )


if __name__ == '__main__':
    import silenttestrunner

    silenttestrunner.main(__name__)