diff tests/test-push-checkheads-unpushed-D1.t @ 31986:f4d5d4f7aee1

obsolescence: add test for the "branch replacement" logic during push, case D1

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

The current code for this logic is very basic (eg: issue4354) and was poorly
tested. We have a better implementation coming in the evolve extension fixing
these issues and with more serious tests coverage. In the process of upstreaming
this improved logic, we start with adding the test case that are already passing
with the current implementation. Once they are all in, we'll upstream the better
implementation and the extra test cases.

See inline documentation for details about the test case added in this
changeset.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-push-checkheads-unpushed-D1.t	Thu Apr 13 16:27:28 2017 +0200
@@ -0,0 +1,77 @@
+====================================
+Testing head checking code: Case D-1
+====================================
+
+Mercurial checks for the introduction of new heads on push. Evolution comes
+into play to detect if existing branches on the server are being replaced by
+some of the new one we push.
+
+This case is part of a series of tests checking this behavior.
+
+Category D: remote head is "obs-affected" locally, but result is not part of the push
+TestCase 1: remote head is rewritten, but successors is not part of the push
+
+.. old-state:
+..
+.. * 1 changeset branch
+..
+.. new-state:
+..
+.. * 1 changeset branch succeeding the old branch
+.. * 1 new unrelated branch
+..
+.. expected-result:
+..
+.. * pushing only the unrelated branch: denied
+..
+.. graph-summary:
+..
+..   A ø⇠○ A'
+..     |/
+..     | ◔ B
+..     |/
+..     ●
+
+  $ . $TESTDIR/testlib/push-checkheads-util.sh
+
+Test setup
+----------
+
+  $ mkdir D1
+  $ cd D1
+  $ setuprepos
+  creating basic server and client repo
+  updating to branch default
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cd client
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit A1
+  created new head
+  $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit B0
+  created new head
+  $ hg log -G --hidden
+  @  74ff5441d343 (draft): B0
+  |
+  | o  f6082bc4ffef (draft): A1
+  |/
+  | x  8aaa48160adc (draft): A0
+  |/
+  o  1e4be0697311 (public): root
+  
+
+Actual testing
+--------------
+
+  $ hg push -r 'desc(B0)'
+  pushing to $TESTTMP/D1/server (glob)
+  searching for changes
+  abort: push creates new remote head 74ff5441d343!
+  (merge or see 'hg help push' for details about pushing new heads)
+  [255]
+
+  $ cd ../..
+