view tests/test-push-checkheads-partial-C1.t @ 6336:453861da6922

topic: use fully qualified branch name during exchange

For the entire duration of exchange process, we now use branch//namespace/topic
format for branchmap, head checking, etc.

Sometimes we still need to disable this feature (e.g. when pushing to a repo
that doesn't have topic extension enabled), but every other case should be
handled using the new fqbn format. This applies both to internal API, such as
having fqbn as branchmap keys and even making ctx.branch() return fqbn, and to
UI, such as users seeing fqbn in hg branches output and messages from hg push.

Things to note: now we're wrapping revbranchcache.branchinfo() during the
extension setup, instead of doing it only in one place in _headssummary().
We're also using override_context_branch context manager that makes
ctx.branch() return fqbn also in cases when we call the original
_headssummary().

There are still places in the UI where branch names are not in fqbn format,
because they don't take part in the exchange process.

====================================
Testing head checking code: Case C-1
====================================

Mercurial checks for the introduction of multiple heads on push. Evolution
comes into play to detect if existing heads on the server are being replaced by
some of the new heads we push.

This test file is part of a series of tests checking this behavior.

Category C: checking case were the branch is only partially obsoleted.
TestCase 1: 2 changeset branch, only the head is rewritten

.. old-state:
..
.. * 2 changeset branch
..
.. new-state:
..
.. * 1 new changesets branches superseding only the head of the old one
.. * base of the old branch is still alive
..
.. expected-result:
..
.. * push denied
..
.. graph-summary:
..
..   B ø⇠◔ B'
..     | |
..   A ○ |
..     |/
..     ○

  $ . $TESTDIR/testlib/push-checkheads-util.sh

Test setup
----------

  $ setuprepos
  creating basic server and client repo
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd server
  $ mkcommit B0
  $ cd ../client
  $ hg pull
  pulling from $TESTTMP/server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets d73caddc5533 (1 drafts)
  (run 'hg update' to get a working copy)
  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ mkcommit B1
  created new head
  $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
  1 new obsolescence markers
  obsoleted 1 changesets
  $ hg log -G --hidden
  @  25c56d33e4c4 [default] (draft): B1
  |
  | x  d73caddc5533 [default] (draft): B0
  | |
  | o  8aaa48160adc [default] (draft): A0
  |/
  o  1e4be0697311 [default] (public): root
  


Actual testing
--------------

  $ hg push
  pushing to $TESTTMP/server
  searching for changes
  abort: push creates new remote head 25c56d33e4c4
  (merge or see 'hg help push' for details about pushing new heads)
  [20]