view tests/test-unamend.t @ 36534:5faeabb07cf5

debugcommands: support for triggering push protocol

The mechanism for pushing to a remote is a bit more complicated
than other commands. On SSH, we wait for a positive reply from
the server before we start sending the bundle payload.

This commit adds a mechanism to the "command" action in
`hg debugwireproto` to trigger the "push protocol" and to
specify a file whose contents should be submitted as the command
payload.

With this new feature, we implement a handful of tests for the
"unbundle" command. We try to cover various server failures and
hook/output scenarios so protocol behavior is as comprehensively
tested as possible. Even with so much test output, we only cover
bundle1 with Python hooks. There's still a lot of test coverage
that needs to be implemented. But this is certainly a good start.

Because there are so many new tests, we split these tests into their
own test file.

In order to make output deterministic, we need to disable the
doublepipe primitive. We add an option to `hg debugwireproto`
to do that. Because something in the bowels of the peer does a
read of stderr, we still capture read I/O from stderr. So there
is test coverage of what the server emits.

The tests around I/O capture some wonkiness. For example,
interleaved ui.write() and ui.write_err() calls are emitted in
order. However, (presumably due to buffering), print() to
sys.stdout and sys.stderr aren't in order.

We currently only test bundle1 because bundle2 is substantially
harder to test because it is more complicated (the server responds
with a stream containing a bundle2 instead of a frame).

Differential Revision: https://phab.mercurial-scm.org/D2471

Test for command `hg unamend` which lives in uncommit extension
===============================================================

  $ cat >> $HGRCPATH << EOF
  > [alias]
  > glog = log -G -T '{rev}:{node|short}  {desc}'
  > [experimental]
  > evolution = createmarkers, allowunstable
  > [extensions]
  > rebase =
  > amend =
  > uncommit =
  > EOF

Repo Setup

  $ hg init repo
  $ cd repo
  $ for ch in a b c d e f g h; do touch $ch; echo "foo" >> $ch; hg ci -Aqm "Added "$ch; done

  $ hg glog
  @  7:ec2426147f0e  Added h
  |
  o  6:87d6d6676308  Added g
  |
  o  5:825660c69f0c  Added f
  |
  o  4:aa98ab95a928  Added e
  |
  o  3:62615734edd5  Added d
  |
  o  2:28ad74487de9  Added c
  |
  o  1:29becc82797a  Added b
  |
  o  0:18d04c59bb5d  Added a
  
Trying to unamend when there was no amend done

  $ hg unamend
  abort: changeset must have one predecessor, found 0 predecessors
  [255]

Unamend on clean wdir and tip

  $ echo "bar" >> h
  $ hg amend

  $ hg exp
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID c9fa1a715c1b7661c0fafb362a9f30bd75878d7d
  # Parent  87d6d66763085b629e6d7ed56778c79827273022
  Added h
  
  diff -r 87d6d6676308 -r c9fa1a715c1b h
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/h	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,2 @@
  +foo
  +bar

  $ hg glog --hidden
  @  8:c9fa1a715c1b  Added h
  |
  | x  7:ec2426147f0e  Added h
  |/
  o  6:87d6d6676308  Added g
  |
  o  5:825660c69f0c  Added f
  |
  o  4:aa98ab95a928  Added e
  |
  o  3:62615734edd5  Added d
  |
  o  2:28ad74487de9  Added c
  |
  o  1:29becc82797a  Added b
  |
  o  0:18d04c59bb5d  Added a
  
  $ hg unamend
  $ hg glog --hidden
  @  9:46d02d47eec6  Added h
  |
  | x  8:c9fa1a715c1b  Added h
  |/
  | x  7:ec2426147f0e  Added h
  |/
  o  6:87d6d6676308  Added g
  |
  o  5:825660c69f0c  Added f
  |
  o  4:aa98ab95a928  Added e
  |
  o  3:62615734edd5  Added d
  |
  o  2:28ad74487de9  Added c
  |
  o  1:29becc82797a  Added b
  |
  o  0:18d04c59bb5d  Added a
  
  $ hg diff
  diff -r 46d02d47eec6 h
  --- a/h	Thu Jan 01 00:00:00 1970 +0000
  +++ b/h	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +1,2 @@
   foo
  +bar

  $ hg exp
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 46d02d47eec6ca096b8dcab3f8f5579c40c3dd9a
  # Parent  87d6d66763085b629e6d7ed56778c79827273022
  Added h
  
  diff -r 87d6d6676308 -r 46d02d47eec6 h
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/h	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +foo

  $ hg status
  M h

  $ hg log -r . -T '{extras % "{extra}\n"}' --config alias.log=log
  branch=default
  unamend_source=c9fa1a715c1b7661c0fafb362a9f30bd75878d7d

Using unamend to undo an unamed (intentional)

  $ hg unamend
  $ hg exp
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 850ddfc1bc662997ec6094ada958f01f0cc8070a
  # Parent  87d6d66763085b629e6d7ed56778c79827273022
  Added h
  
  diff -r 87d6d6676308 -r 850ddfc1bc66 h
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/h	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,2 @@
  +foo
  +bar
  $ hg diff

Unamend on a dirty working directory

  $ echo "bar" >> a
  $ hg amend
  $ echo "foobar" >> a
  $ echo "bar" >> b
  $ hg status
  M a
  M b

  $ hg unamend

  $ hg status
  M a
  M b

  $ hg diff
  diff -r ec338db45d51 a
  --- a/a	Thu Jan 01 00:00:00 1970 +0000
  +++ b/a	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +1,3 @@
   foo
  +bar
  +foobar
  diff -r ec338db45d51 b
  --- a/b	Thu Jan 01 00:00:00 1970 +0000
  +++ b/b	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +1,2 @@
   foo
  +bar

Unamending an added file

  $ hg ci -m "Added things to a and b"
  $ echo foo > bar
  $ hg add bar
  $ hg amend

  $ hg unamend
  $ hg status
  A bar

  $ hg revert --all
  forgetting bar

Unamending a removed file

  $ hg remove a
  $ hg amend

  $ hg unamend
  $ hg status
  R a
  ? bar

  $ hg revert --all
  undeleting a

Unamending an added file with dirty wdir status

  $ hg add bar
  $ hg amend
  $ echo bar >> bar
  $ hg status
  M bar

  $ hg unamend
  $ hg status
  A bar
  $ hg diff
  diff -r 7f79409af972 bar
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/bar	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,2 @@
  +foo
  +bar

  $ hg revert --all
  forgetting bar

Unamending in middle of a stack

  $ hg glog
  @  19:7f79409af972  Added things to a and b
  |
  o  12:ec338db45d51  Added h
  |
  o  6:87d6d6676308  Added g
  |
  o  5:825660c69f0c  Added f
  |
  o  4:aa98ab95a928  Added e
  |
  o  3:62615734edd5  Added d
  |
  o  2:28ad74487de9  Added c
  |
  o  1:29becc82797a  Added b
  |
  o  0:18d04c59bb5d  Added a
  
  $ hg up 5
  2 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo bar >> f
  $ hg amend
  3 new orphan changesets
  $ hg rebase -s 6 -d . -q

  $ hg glog
  o  23:03ddd6fc5af1  Added things to a and b
  |
  o  22:3e7b64ee157b  Added h
  |
  o  21:49635b68477e  Added g
  |
  @  20:93f0e8ffab32  Added f
  |
  o  4:aa98ab95a928  Added e
  |
  o  3:62615734edd5  Added d
  |
  o  2:28ad74487de9  Added c
  |
  o  1:29becc82797a  Added b
  |
  o  0:18d04c59bb5d  Added a
  

  $ hg --config experimental.evolution=createmarkers unamend
  abort: cannot unamend changeset with children
  [255]

  $ hg unamend
  3 new orphan changesets

Trying to unamend a public changeset

  $ hg up -C 23
  5 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg phase -r . -p
  1 new phase-divergent changesets
  $ hg unamend
  abort: cannot unamend public changesets
  (see 'hg help phases' for details)
  [255]

Testing whether unamend retains copies or not

  $ hg status
  ? bar

  $ hg mv a foo

  $ hg ci -m "Moved a to foo"
  $ hg exp --git
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID cfef290346fbee5126313d7e1aab51d877679b09
  # Parent  03ddd6fc5af19e028c44a2fd6d790dd22712f231
  Moved a to foo
  
  diff --git a/a b/foo
  rename from a
  rename to foo

  $ hg mv b foobar
  $ hg diff --git
  diff --git a/b b/foobar
  rename from b
  rename to foobar
  $ hg amend

  $ hg exp --git
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID eca050985275bb271ce3092b54e56ea5c85d29a3
  # Parent  03ddd6fc5af19e028c44a2fd6d790dd22712f231
  Moved a to foo
  
  diff --git a/a b/foo
  rename from a
  rename to foo
  diff --git a/b b/foobar
  rename from b
  rename to foobar

  $ hg mv c wat
  $ hg unamend

Retained copies in new prdecessor commit

  $ hg exp --git
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 552e3af4f01f620f88ca27be1f898316235b736a
  # Parent  03ddd6fc5af19e028c44a2fd6d790dd22712f231
  Moved a to foo
  
  diff --git a/a b/foo
  rename from a
  rename to foo

Retained copies in working directoy

  $ hg diff --git
  diff --git a/b b/foobar
  rename from b
  rename to foobar
  diff --git a/c b/wat
  rename from c
  rename to wat