tests: demonstrate obsmarker creation after discarding conflicting changes
Continued evolve creates an incorrect obsmarker that says 2 is a successor of
1. It's incorrect because 1 was dropped as it created no changes to commit
(after conflict resolution that discarded its changes).
If evolve does the same thing in one go (e.g. just by using --tool :local and
without subsequent need to continue) the obsmarker is correct.
Test that share-clones use the cache in the original repository.
$ . $TESTDIR/testlib/common.sh
$ hg init share-base
$ cd share-base/
$ cat >> .hg/hgrc <<EOF
> [extensions]
> evolve=
> share=
> EOF
$ hg debugbuilddag .+3:branchpoint+4*branchpoint+2
$ cd ..
$ hg --config extensions.share= share -U share-base share-client
$ cd share-client
$ hg debugupdatecache
$ test -d .hg/cache
[1]
$ test -d ../share-base/.hg/cache