changeset 3537:8b5093f333dc

tests: add a test about evolve stabilizing orphan caused by splits

There are some similar tests lying around in the test suite but they are not
well arranged. I wanted the test suite to be a goto reference for all the
behaviors till the time we get all of them documented.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-evolve-orphan-split.t	Wed Mar 14 17:20:20 2018 +0530
@@ -0,0 +1,192 @@
+** Testing resolution of orphans by `hg evolve` where an obsolete changeset has
+multiple successors **
+
+  $ cat >> $HGRCPATH <<EOF
+  > [ui]
+  > interactive = True
+  > [alias]
+  > glog = log -GT "{rev}:{node|short} {desc}\n ({bookmarks}) {phase}"
+  > [extensions]
+  > rebase =
+  > EOF
+  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH
+
+Repo Setup
+
+  $ hg init repo
+  $ cd repo
+  $ echo ".*\.orig" > .hgignore
+  $ hg add .hgignore
+  $ hg ci -m "added hgignore"
+
+An orphan changeset with parent got splitted
+--------------------------------------------
+
+  $ for ch in a b c; do echo foo > $ch; done;
+
+  $ hg add a b
+  $ hg ci -m "added a and b"
+  $ hg add c
+  $ hg ci -m "added c"
+
+  $ hg glog
+  @  2:86e1ebf1ca61 added c
+  |   () draft
+  o  1:d0ddb614efbd added a and b
+  |   () draft
+  o  0:8fa14d15e168 added hgignore
+      () draft
+
+  $ hg split -r 1 <<EOF
+  > y
+  > y
+  > n
+  > y
+  > EOF
+  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
+  adding a
+  adding b
+  diff --git a/a b/a
+  new file mode 100644
+  examine changes to 'a'? [Ynesfdaq?] y
+  
+  @@ -0,0 +1,1 @@
+  +foo
+  record change 1/2 to 'a'? [Ynesfdaq?] y
+  
+  diff --git a/b b/b
+  new file mode 100644
+  examine changes to 'b'? [Ynesfdaq?] n
+  
+  created new head
+  Done splitting? [yN] y
+  1 new orphan changesets
+
+  $ hg glog
+  @  4:8b179cffc81c added a and b
+  |   () draft
+  o  3:bd3735d4dab0 added a and b
+  |   () draft
+  | *  2:86e1ebf1ca61 added c
+  | |   () draft
+  | x  1:d0ddb614efbd added a and b
+  |/    () draft
+  o  0:8fa14d15e168 added hgignore
+      () draft
+
+  $ hg evolve
+  move:[2] added c
+  atop:[4] added a and b
+  working directory is now at af13f0560b31
+
+  $ hg glog
+  @  5:af13f0560b31 added c
+  |   () draft
+  o  4:8b179cffc81c added a and b
+  |   () draft
+  o  3:bd3735d4dab0 added a and b
+  |   () draft
+  o  0:8fa14d15e168 added hgignore
+      () draft
+
+When the successors does not form a linear chain and are multiple heads
+-----------------------------------------------------------------------
+
+  $ hg fold -r .^^::. --exact -m "added a b c"
+  3 changesets folded
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+
+  $ hg glog
+  @  6:f89e4764f2ed added a b c
+  |   () draft
+  o  0:8fa14d15e168 added hgignore
+      () draft
+  $ echo foo > d
+  $ hg ci -Aqm "added d"
+
+  $ hg glog
+  @  7:d48a30875f01 added d
+  |   () draft
+  o  6:f89e4764f2ed added a b c
+  |   () draft
+  o  0:8fa14d15e168 added hgignore
+      () draft
+  $ hg prev
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  [6] added a b c
+  $ hg split -r . <<EOF
+  > y
+  > n
+  > y
+  > y
+  > y
+  > y
+  > y
+  > EOF
+  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
+  adding a
+  adding b
+  adding c
+  diff --git a/a b/a
+  new file mode 100644
+  examine changes to 'a'? [Ynesfdaq?] y
+  
+  @@ -0,0 +1,1 @@
+  +foo
+  record change 1/3 to 'a'? [Ynesfdaq?] n
+  
+  diff --git a/b b/b
+  new file mode 100644
+  examine changes to 'b'? [Ynesfdaq?] y
+  
+  @@ -0,0 +1,1 @@
+  +foo
+  record change 2/3 to 'b'? [Ynesfdaq?] y
+  
+  diff --git a/c b/c
+  new file mode 100644
+  examine changes to 'c'? [Ynesfdaq?] y
+  
+  @@ -0,0 +1,1 @@
+  +foo
+  record change 3/3 to 'c'? [Ynesfdaq?] y
+  
+  created new head
+  Done splitting? [yN] y
+  1 new orphan changesets
+
+  $ hg glog
+  @  9:c0fbf8aaf6c4 added a b c
+  |   () draft
+  o  8:f2632392aefe added a b c
+  |   () draft
+  | *  7:d48a30875f01 added d
+  | |   () draft
+  | x  6:f89e4764f2ed added a b c
+  |/    () draft
+  o  0:8fa14d15e168 added hgignore
+      () draft
+
+  $ hg rebase -r . -d 8fa14d15e168
+  rebasing 9:c0fbf8aaf6c4 "added a b c" (tip)
+  $ hg glog
+  @  10:7f87764e5b64 added a b c
+  |   () draft
+  | o  8:f2632392aefe added a b c
+  |/    () draft
+  | *  7:d48a30875f01 added d
+  | |   () draft
+  | x  6:f89e4764f2ed added a b c
+  |/    () draft
+  o  0:8fa14d15e168 added hgignore
+      () draft
+
+  $ hg evolve --dry-run
+  cannot solve split across two branches
+
+XXX: this sounds like a good thing, maybe we should suggest using commands like
+grab or rebase to resolve this. Moreover showing the branch heads or list of
+successors on different branches will be good.
+
+  $ hg evolve --all
+  cannot solve split across two branches