# HG changeset patch
# User Pierre-Yves David <pierre-yves.da...@ens-lyon.org>
# Date 1492093419 -7200
#      Thu Apr 13 16:23:39 2017 +0200
# Node ID 28f833e962f797924e599da54c06ecf01a37a802
# Parent  51dce1178a92660974fe210eff66d43b91986a31
# EXP-Topic push.checkheads
# Available At https://www.mercurial-scm.org/repo/users/marmoute/mercurial/
#              hg pull 
https://www.mercurial-scm.org/repo/users/marmoute/mercurial/ -r 28f833e962f7
obsolescence: add test for the "branch replacement" logic during push, case A4

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.

diff --git a/tests/test-push-checkheads-superceed-A4.t 
b/tests/test-push-checkheads-superceed-A4.t
new file mode 100644
--- /dev/null
+++ b/tests/test-push-checkheads-superceed-A4.t
@@ -0,0 +1,74 @@
+====================================
+Testing head checking code: Case A-4
+====================================
+
+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 A: simple case involving a branch being superceeded by another.
+TestCase 4: New changeset as children of the successor
+
+.. old-state:
+..
+.. * 1-changeset branch
+..
+.. new-state:
+..
+.. * 2-changeset branch, first is a successor, but head is new
+..
+.. expected-result:
+..
+.. * push allowed
+..
+.. graph-summary:
+..
+..       ◔ B
+..       |
+..   A ø⇠◔ A'
+..     |/
+..     ●
+
+  $ . $TESTDIR/testlib/push-checkheads-util.sh
+
+Test setup
+----------
+
+  $ mkdir A4
+  $ cd A4
+  $ 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)"`
+  $ mkcommit B0
+  $ hg log -G --hidden
+  @  f40ded968333 (draft): B0
+  |
+  o  f6082bc4ffef (draft): A1
+  |
+  | x  8aaa48160adc (draft): A0
+  |/
+  o  1e4be0697311 (public): root
+  
+
+Actual testing
+--------------
+
+  $ hg push
+  pushing to $TESTTMP/A4/server (glob)
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 2 changesets with 2 changes to 2 files (+1 heads)
+  1 new obsolescence markers
+
+  $ cd ../../
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