tests: add extension to emulate invoking internalpatch at the specific time
This extension fakes "mtime" of patched files to emulate invoking
'patch.internalpatch()' at the specific time.
This is useful to reproduce timing critical issues fixed in subsequent
patches.
$ rm -rf a
$ hg init a
$ cd a
$ echo a > a
$ hg ci -Am0
adding a
$ hg tag t1 # 1
$ hg tag --remove t1 # 2
$ hg co 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg tag -f -r0 t1
$ hg tags
tip 3:a49829c4fc11
t1 0:f7b1eb17ad24
$ cd ..