diff -r 099e0ca8285e -r de9089514833 tests/test-unstable-orphan.t
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-unstable-orphan.t	Thu Apr 11 22:13:55 2019 +0200
@@ -0,0 +1,131 @@
+==================================
+Test for "orphan" type instability
+==================================
+
+This file gather test case around the "orphan" changeset instability. This
+instability happens when a changesets has obsolete ancestors.
+
+  $ cat >> $HGRCPATH <<EOF
+  > [defaults]
+  > amend=-d "0 0"
+  > fold=-d "0 0"
+  > [web]
+  > push_ssl = false
+  > allow_push = *
+  > [phases]
+  > publish = False
+  > [diff]
+  > git = 1
+  > unified = 0
+  > [ui]
+  > logtemplate = {rev}:{node|short}@{branch}({phase}) {desc|firstline}\n
+  > [extensions]
+  > EOF
+  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH
+  $ mkcommit() {
+  >    echo "$1" > "$1"
+  >    hg add "$1"
+  >    hg ci -m "add $1"
+  > }
+
+  $ mkstack() {
+  >    # Creates a stack of commit based on $1 with messages from $2, $3 ..
+  >    hg update "$1" -C
+  >    shift
+  >    mkcommits $*
+  > }
+
+  $ mkcommits() {
+  >   for i in $@; do mkcommit $i ; done
+  > }
+
+orphan parent is obsolete with a single successor
+=================================================
+
+Test orphan resolution for a changeset orphan because its parent is obsolete
+with one successor.
+
+  $ hg init test1
+  $ cd test1
+  $ mkcommits _a _b _c
+  $ hg up "desc(_b)"
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg amend -m "bprime"
+  1 new orphan changesets
+  $ hg log -G
+  @  3:36050226a9b9@default(draft) bprime
+  |
+  | *  2:102002290587@default(draft) add _c
+  | |
+  | x  1:37445b16603b@default(draft) add _b
+  |/
+  o  0:135f39f4bd78@default(draft) add _a
+  
+
+  $ hg evo --all --any --orphan
+  move:[2] add _c
+  atop:[3] bprime
+  working directory is now at fdcf3523a74d
+  $ hg log -G
+  @  4:fdcf3523a74d@default(draft) add _c
+  |
+  o  3:36050226a9b9@default(draft) bprime
+  |
+  o  0:135f39f4bd78@default(draft) add _a
+  
+
+  $ cd ..
+
+
+orphan parent is obsolete with a multiple successors (reversed order)
+=====================================================================
+
+Test orphan resolution for a changeset orphan because its parent is obsolete
+with multiple successors on the same branch but in reverse order (cross-split).
+
+  $ hg init test5
+  $ cd test5
+  $ mkcommits _a _b _c
+  $ hg up "desc(_a)"
+  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
+  $ mkcommits bprimesplit1 bprimesplit2
+  created new head
+  $ hg prune "desc(_b)" -s "desc(bprimesplit1) + desc(bprimesplit2)" --split
+  1 changesets pruned
+  1 new orphan changesets
+  $ hg up "desc(_a)"
+  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
+  $ mkcommits bsecondsplit1 bsecondsplit2
+  created new head
+  $ hg prune "desc(bprimesplit1)" -s "desc(bsecondsplit2)"
+  1 changesets pruned
+  1 new orphan changesets
+  $ hg prune "desc(bprimesplit2)" -s "desc(bsecondsplit1)"
+  1 changesets pruned
+  $ hg log -G
+  @  6:59b942dbda14@default(draft) add bsecondsplit2
+  |
+  o  5:8ffdae67d696@default(draft) add bsecondsplit1
+  |
+  | *  2:102002290587@default(draft) add _c
+  | |
+  | x  1:37445b16603b@default(draft) add _b
+  |/
+  o  0:135f39f4bd78@default(draft) add _a
+  
+
+  $ hg evo --all --any --orphan
+  move:[2] add _c
+  atop:[6] add bsecondsplit2
+  working directory is now at 98e3f21461ff
+  $ hg log -G
+  @  7:98e3f21461ff@default(draft) add _c
+  |
+  o  6:59b942dbda14@default(draft) add bsecondsplit2
+  |
+  o  5:8ffdae67d696@default(draft) add bsecondsplit1
+  |
+  o  0:135f39f4bd78@default(draft) add _a
+  
+
+  $ cd ..