annotate tests/test-evolve-content-divergent-case-A5.t @ 5781:613a144de642

divergence-resolution: add a buggy test case for resolution

Explained in more details in the test itself. This will be fixed
by next patch.

===============================================
Testing content-divergence resolution: Case A.5
===============================================

Independent rewrites of same changeset can lead to content-divergence. In most
common cases, it can occur when multiple users rewrite the same changeset
independently and push it.

This test belongs to a series of tests checking the resolution of content-divergent
changesets.

Category A: no parents are obsolete
Testcase 5: one side relocated backward and other rebased to parent's successor
Variants:
# a: "local" is relocated backward
# b: "other" is relocated backward

A.5 Relocated backward; Rebased to parent's successor
=====================================================

.. (Divergence reason):
..    local: relocated the changeset backward in the graph
..    other: rebased to the successor of parent
.. Since one side rebased to the successor of parent and other cset relocated backward,
.. the most reasonable behaviour is to set the parent of "backward-relocated" cset
.. as resolution parent of divergence.
..
.. (local):
..
..      C ø⇠○ C'
..        | |
..      B ○ |
..        | /
..      A ○
..        |
..      O ●
..
.. (other):
..
..      C ø⇠○ C''
..        | |
..      B ø⇠○ B'
..        | /
..      A ○
..        |
..      O ●
..
.. (Resolution):
XXX: current resolution is wrong and doesn't not do what we expect here, it will be fixed in next patch
..
..   B'○  ○ C'''
..     | /
..   A ○
..     |
..   O ●
..

Setup
-----
  $ . $TESTDIR/testlib/content-divergence-util.sh
  $ setuprepos A.5
  creating test repo for test case A.5
  - upstream
  - local
  - other
  cd into `local` and proceed with env setup

initial

  $ cd upstream
  $ mkcommit A
  $ mkcommit B
  $ mkcommit C
  $ cd ../local
  $ hg pull -qu
  $ hg rebase -r 'desc(C)' -d 'desc(A)'
  rebasing 3:d90aa47aa5d3 tip "C"

  $ cd ../other
  $ hg pull -qu
  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [2] B
  $ echo newB > B
  $ hg amend
  1 new orphan changesets
  $ hg next
  move:[3] C
  atop:[4] B
  working directory is now at f085ae420789
  $ hg push -q

  $ cd ../local
  $ hg push -fq
  2 new content-divergent changesets
  $ hg pull -q
  2 new content-divergent changesets


Actual test of resolution
-------------------------

Variant_a: when "local" is rebased backward
-------------------------------------------
  $ hg evolve -l
  b80b2bbeb664: C
    content-divergent: f085ae420789 (draft) (precursor d90aa47aa5d3)
  
  f085ae420789: C
    content-divergent: b80b2bbeb664 (draft) (precursor d90aa47aa5d3)
  
  $ hg log -G
  *  6:f085ae420789 (draft): C [content-divergent]
  |
  o  5:7db72af2e30d (draft): B
  |
  | @  4:b80b2bbeb664 (draft): C [content-divergent]
  |/
  o  1:f5bc6836db60 (draft): A
  |
  o  0:a9bdc8b26820 (public): O
  
  $ hg evolve --content-divergent
  merge:[4] C
  with: [6] C
  base: [3] C
  rebasing "divergent" content-divergent changeset b80b2bbeb664 on 7db72af2e30d
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  working directory is now at 43fe36f524e4

  $ hg log -G
  @  8:43fe36f524e4 (draft): C
  |
  o  5:7db72af2e30d (draft): B
  |
  o  1:f5bc6836db60 (draft): A
  |
  o  0:a9bdc8b26820 (public): O
  
  $ hg evolve -l


Variant_b: when "other" is rebased backward
-------------------------------------------

  $ cd ../other
  $ hg pull -q
  2 new content-divergent changesets
  $ hg evolve -l
  f085ae420789: C
    content-divergent: b80b2bbeb664 (draft) (precursor d90aa47aa5d3)
  
  b80b2bbeb664: C
    content-divergent: f085ae420789 (draft) (precursor d90aa47aa5d3)
  
  $ hg log -G
  *  6:b80b2bbeb664 (draft): C [content-divergent]
  |
  | @  5:f085ae420789 (draft): C [content-divergent]
  | |
  | o  4:7db72af2e30d (draft): B
  |/
  o  1:f5bc6836db60 (draft): A
  |
  o  0:a9bdc8b26820 (public): O
  
  $ hg evolve --content-divergent
  merge:[5] C
  with: [6] C
  base: [3] C
  rebasing "other" content-divergent changeset b80b2bbeb664 on 7db72af2e30d
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  working directory is now at 5844b6472deb

  $ hg log -G
  @  8:5844b6472deb (draft): C
  |
  o  4:7db72af2e30d (draft): B
  |
  o  1:f5bc6836db60 (draft): A
  |
  o  0:a9bdc8b26820 (public): O
  
  $ hg evolve -l