diff tests/test-evolve-content-divergent-case-A4.t @ 5392:5c08b3bec031

evolve: add test for content-div case A4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-evolve-content-divergent-case-A4.t	Sat Jun 20 11:24:14 2020 +0530
@@ -0,0 +1,197 @@
+===============================================
+Testing content-divergence resolution: Case A.4
+===============================================
+
+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 4: both sides relocated forward to different location but aligned
+Variants:
+# a: local is ahead of other
+# b: other is ahead of local
+
+A.4 Both relocated forward
+==========================
+
+.. (Divergence reason):
+..    local: relocated the changeset forward in the graph but on the same topo branch
+..    other: relocated the changeset forward in the graph but on the same topo branch
+.. Where we show that since both changesets relocated forward in the graph,
+.. we can assume the reason for ahead one being ahead is that it's rebased on the latest changes and
+.. its parent should be the resolution parent. So, we will relocate the other changeset to resolution
+.. parent and perform 3-way merge.
+..
+.. (local):
+..
+..    D ø⇠○ D'
+..      | |
+..      | ○ C
+..      | |
+..      | ○ B
+..      \ |
+..        ○ A
+..        |
+..        ● O
+..
+.. (other):
+..
+..    D ø⇠○ D''
+..      | |  ○ C
+..      | | /
+..      | ○ B
+..      \ |
+..        ○ A
+..        |
+..        ● O
+..
+.. (Resolution):
+..     ○ D'''
+..     |
+..     ○ C
+..     |
+..     ○ B
+..     |
+..     ○ A
+..     |
+..     ● O
+..
+
+Setup
+-----
+  $ . $TESTDIR/testlib/content-divergence-util.sh
+  $ setuprepos A.4
+  creating test repo for test case A.4
+  - upstream
+  - local
+  - other
+  cd into `local` and proceed with env setup
+
+initial
+
+  $ cd upstream
+  $ mkcommit A
+  $ mkcommit B
+  $ mkcommit C
+  $ hg co -r 'desc(A)'
+  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
+  $ mkcommit D
+  created new head
+  $ cd ../local
+  $ hg pull -qu
+  $ hg rebase -r 'desc(D)' -d 'desc(C)'
+  rebasing 4:6a418860e87b "D" (tip)
+
+  $ cd ../other
+  $ hg pull -qu
+  $ hg rebase -r 'desc(D)' -d 'desc(B)'
+  rebasing 4:6a418860e87b "D" (tip)
+  $ hg push -q
+
+  $ cd ../local
+  $ hg push -q
+  2 new content-divergent changesets
+  $ hg pull -q
+  2 new content-divergent changesets
+
+Actual test of resolution
+-------------------------
+
+Variant_a: when local is ahead of other
+---------------------------------------
+
+  $ hg evolve -l
+  d203ddccc9cc: D
+    content-divergent: 5d3fd66cb347 (draft) (precursor 6a418860e87b)
+  
+  5d3fd66cb347: D
+    content-divergent: d203ddccc9cc (draft) (precursor 6a418860e87b)
+  
+  $ hg log -G --hidden
+  *  6:5d3fd66cb347 (draft): D [content-divergent]
+  |
+  | @  5:d203ddccc9cc (draft): D [content-divergent]
+  | |
+  | | x  4:6a418860e87b (draft): D
+  | | |
+  | o |  3:d90aa47aa5d3 (draft): C
+  |/ /
+  o /  2:f6fbb35d8ac9 (draft): B
+  |/
+  o  1:f5bc6836db60 (draft): A
+  |
+  o  0:a9bdc8b26820 (public): O
+  
+  $ hg evolve --content-divergent
+  merge:[5] D
+  with: [6] D
+  base: [4] D
+  rebasing "other" content-divergent changeset 5d3fd66cb347 on d90aa47aa5d3
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  working directory is now at 898f6bbfb21e
+
+  $ hg log -G
+  @  8:898f6bbfb21e (draft): D
+  |
+  o  3:d90aa47aa5d3 (draft): C
+  |
+  o  2:f6fbb35d8ac9 (draft): B
+  |
+  o  1:f5bc6836db60 (draft): A
+  |
+  o  0:a9bdc8b26820 (public): O
+  
+  $ hg evolve -l
+
+Variant_b: when other is ahead of local
+---------------------------------------
+
+  $ cd ../other
+  $ hg pull -q
+  2 new content-divergent changesets
+
+  $ hg evolve -l
+  5d3fd66cb347: D
+    content-divergent: d203ddccc9cc (draft) (precursor 6a418860e87b)
+  
+  d203ddccc9cc: D
+    content-divergent: 5d3fd66cb347 (draft) (precursor 6a418860e87b)
+  
+  $ hg log -G --hidden
+  *  6:d203ddccc9cc (draft): D [content-divergent]
+  |
+  | @  5:5d3fd66cb347 (draft): D [content-divergent]
+  | |
+  | | x  4:6a418860e87b (draft): D
+  | | |
+  o | |  3:d90aa47aa5d3 (draft): C
+  |/ /
+  o /  2:f6fbb35d8ac9 (draft): B
+  |/
+  o  1:f5bc6836db60 (draft): A
+  |
+  o  0:a9bdc8b26820 (public): O
+  
+  $ hg evolve --content-divergent
+  merge:[6] D
+  with: [5] D
+  base: [4] D
+  rebasing "other" content-divergent changeset 5d3fd66cb347 on d90aa47aa5d3
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  working directory is now at 898f6bbfb21e
+
+  $ hg log -G
+  @  8:898f6bbfb21e (draft): D
+  |
+  o  3:d90aa47aa5d3 (draft): C
+  |
+  o  2:f6fbb35d8ac9 (draft): B
+  |
+  o  1:f5bc6836db60 (draft): A
+  |
+  o  0:a9bdc8b26820 (public): O
+