view tests/test-annotate.py @ 34940:c2b30348930f stable

dirstate: clean up when restoring identical backups

When a dirstate backup is restored, it is possible that no actual changes to
the dirstate have been made.  In this case, the backup is still a hardlink
to the original dirstate.

Unfortunately, `os.rename` silently fails (nothing happens, and no error
occurs) when `src` and `dst` are hardlinks to the same file.  As a result,
the backup is left lying around.  Over time, these files accumulate.

When restoring dirstate backups, check if the backup and the dirstate are
the same file, and if so, just delete the backup.

Differential Revision: https://phab.mercurial-scm.org/D1201

from __future__ import absolute_import
from __future__ import print_function

import unittest

from mercurial import (
    mdiff,
)
from mercurial.context import (
    annotateline,
    _annotatepair,
)

class AnnotateTests(unittest.TestCase):
    """Unit tests for annotate code."""

    def testannotatepair(self):
        self.maxDiff = None # camelcase-required

        oldfctx = b'old'
        p1fctx, p2fctx, childfctx = b'p1', b'p2', b'c'
        olddata = b'a\nb\n'
        p1data = b'a\nb\nc\n'
        p2data = b'a\nc\nd\n'
        childdata = b'a\nb2\nc\nc2\nd\n'
        diffopts = mdiff.diffopts()

        def decorate(text, rev):
            return ([annotateline(fctx=rev, lineno=i)
                     for i in xrange(1, text.count(b'\n') + 1)],
                    text)

        # Basic usage

        oldann = decorate(olddata, oldfctx)
        p1ann = decorate(p1data, p1fctx)
        p1ann = _annotatepair([oldann], p1fctx, p1ann, False, diffopts)
        self.assertEqual(p1ann[0], [
            annotateline('old', 1),
            annotateline('old', 2),
            annotateline('p1', 3),
        ])

        p2ann = decorate(p2data, p2fctx)
        p2ann = _annotatepair([oldann], p2fctx, p2ann, False, diffopts)
        self.assertEqual(p2ann[0], [
            annotateline('old', 1),
            annotateline('p2', 2),
            annotateline('p2', 3),
        ])

        # Test with multiple parents (note the difference caused by ordering)

        childann = decorate(childdata, childfctx)
        childann = _annotatepair([p1ann, p2ann], childfctx, childann, False,
                                 diffopts)
        self.assertEqual(childann[0], [
            annotateline('old', 1),
            annotateline('c', 2),
            annotateline('p2', 2),
            annotateline('c', 4),
            annotateline('p2', 3),
        ])

        childann = decorate(childdata, childfctx)
        childann = _annotatepair([p2ann, p1ann], childfctx, childann, False,
                                 diffopts)
        self.assertEqual(childann[0], [
            annotateline('old', 1),
            annotateline('c', 2),
            annotateline('p1', 3),
            annotateline('c', 4),
            annotateline('p2', 3),
        ])

        # Test with skipchild (note the difference caused by ordering)

        childann = decorate(childdata, childfctx)
        childann = _annotatepair([p1ann, p2ann], childfctx, childann, True,
                                 diffopts)
        self.assertEqual(childann[0], [
            annotateline('old', 1),
            annotateline('old', 2, True),
            # note that this line was carried over from earlier so it is *not*
            # marked skipped
            annotateline('p2', 2),
            annotateline('p2', 2, True),
            annotateline('p2', 3),
        ])

        childann = decorate(childdata, childfctx)
        childann = _annotatepair([p2ann, p1ann], childfctx, childann, True,
                                 diffopts)
        self.assertEqual(childann[0], [
            annotateline('old', 1),
            annotateline('old', 2, True),
            annotateline('p1', 3),
            annotateline('p1', 3, True),
            annotateline('p2', 3),
        ])

if __name__ == '__main__':
    import silenttestrunner
    silenttestrunner.main(__name__)