tests/test-fileset-generated.t

wireproto: implement basic frame reading and processing

We just implemented support for writing frames. Now let's implement
support for reading them.

The bulk of the new code is for a class that maintains the state of
a server. Essentially, you construct an instance, feed frames to it,
and it tells you what you should do next. The design is inspired by
the "sans I/O" movement and the reactor pattern. We don't want to
perform I/O or any major blocking event during frame ingestion because
this arbitrarily limits ways that server pieces can be implemented.
For example, it makes it much harder to swap in an alternate
implementation based on asyncio or do crazy things like have requests
dispatch to other processes.

We do still implement readframe() which does I/O. But it is decoupled
from the server reactor. And important parsing of frame headers is
a standalone function. So I/O is only needed to obtain frame data.

Because testing server-side ingest is useful and difficult on running
servers, we create a new "debugreflect" endpoint that will echo back
to the client what was received and how it was interpreted. This could
be useful for a server admin, someone implementing a client. But
immediately, it is useful for testing: we're able to demonstrate that
frames are parsed correctly and turned into requests to run commands
without having to implement command dispatch on the server!

In addition, we implement Python level unit tests for the reactor.
This is vastly more efficient than sending requests to the
"debugreflect" endpoint and vastly more powerful for advanced
testing.

Differential Revision: https://phab.mercurial-scm.org/D2852

  $ hg init

Set up history and working copy

  $ $PYTHON $TESTDIR/generate-working-copy-states.py state 2 1
  $ hg addremove -q --similarity 0
  $ hg commit -m first

  $ $PYTHON $TESTDIR/generate-working-copy-states.py state 2 2
  $ hg addremove -q --similarity 0
  $ hg commit -m second

  $ $PYTHON $TESTDIR/generate-working-copy-states.py state 2 wc
  $ hg addremove -q --similarity 0
  $ hg forget *_*_*-untracked
  $ rm *_*_missing-*

Test status

  $ hg st -A 'set:modified()'
  M content1_content1_content3-tracked
  M content1_content2_content1-tracked
  M content1_content2_content3-tracked
  M missing_content2_content3-tracked

  $ hg st -A 'set:added()'
  A content1_missing_content1-tracked
  A content1_missing_content3-tracked
  A missing_missing_content3-tracked

  $ hg st -A 'set:removed()'
  R content1_content1_content1-untracked
  R content1_content1_content3-untracked
  R content1_content1_missing-untracked
  R content1_content2_content1-untracked
  R content1_content2_content2-untracked
  R content1_content2_content3-untracked
  R content1_content2_missing-untracked
  R missing_content2_content2-untracked
  R missing_content2_content3-untracked
  R missing_content2_missing-untracked

  $ hg st -A 'set:deleted()'
  ! content1_content1_missing-tracked
  ! content1_content2_missing-tracked
  ! content1_missing_missing-tracked
  ! missing_content2_missing-tracked
  ! missing_missing_missing-tracked

  $ hg st -A 'set:missing()'
  ! content1_content1_missing-tracked
  ! content1_content2_missing-tracked
  ! content1_missing_missing-tracked
  ! missing_content2_missing-tracked
  ! missing_missing_missing-tracked

  $ hg st -A 'set:unknown()'
  ? content1_missing_content1-untracked
  ? content1_missing_content3-untracked
  ? missing_missing_content3-untracked

  $ hg st -A 'set:clean()'
  C content1_content1_content1-tracked
  C content1_content2_content2-tracked
  C missing_content2_content2-tracked

Test log

  $ hg log -T '{rev}\n' --stat 'set:modified()'
  1
   content1_content2_content1-tracked |  2 +-
   content1_content2_content3-tracked |  2 +-
   missing_content2_content3-tracked  |  1 +
   3 files changed, 3 insertions(+), 2 deletions(-)
  
  0
   content1_content1_content3-tracked |  1 +
   content1_content2_content1-tracked |  1 +
   content1_content2_content3-tracked |  1 +
   3 files changed, 3 insertions(+), 0 deletions(-)
  
Largefiles doesn't crash
  $ hg log -T '{rev}\n' --stat 'set:modified()' --config extensions.largefiles=
  The fsmonitor extension is incompatible with the largefiles extension and has been disabled. (fsmonitor !)
  1
   content1_content2_content1-tracked |  2 +-
   content1_content2_content3-tracked |  2 +-
   missing_content2_content3-tracked  |  1 +
   3 files changed, 3 insertions(+), 2 deletions(-)
  
  0
   content1_content1_content3-tracked |  1 +
   content1_content2_content1-tracked |  1 +
   content1_content2_content3-tracked |  1 +
   3 files changed, 3 insertions(+), 0 deletions(-)
  
  $ hg log -T '{rev}\n' --stat 'set:added()'
  1
   content1_missing_content1-tracked |  1 -
   content1_missing_content3-tracked |  1 -
   2 files changed, 0 insertions(+), 2 deletions(-)
  
  0
   content1_missing_content1-tracked |  1 +
   content1_missing_content3-tracked |  1 +
   2 files changed, 2 insertions(+), 0 deletions(-)
  
  $ hg log -T '{rev}\n' --stat 'set:removed()'
  1
   content1_content2_content1-untracked |  2 +-
   content1_content2_content2-untracked |  2 +-
   content1_content2_content3-untracked |  2 +-
   content1_content2_missing-untracked  |  2 +-
   missing_content2_content2-untracked  |  1 +
   missing_content2_content3-untracked  |  1 +
   missing_content2_missing-untracked   |  1 +
   7 files changed, 7 insertions(+), 4 deletions(-)
  
  0
   content1_content1_content1-untracked |  1 +
   content1_content1_content3-untracked |  1 +
   content1_content1_missing-untracked  |  1 +
   content1_content2_content1-untracked |  1 +
   content1_content2_content2-untracked |  1 +
   content1_content2_content3-untracked |  1 +
   content1_content2_missing-untracked  |  1 +
   7 files changed, 7 insertions(+), 0 deletions(-)
  
  $ hg log -T '{rev}\n' --stat 'set:deleted()'
  1
   content1_content2_missing-tracked |  2 +-
   content1_missing_missing-tracked  |  1 -
   missing_content2_missing-tracked  |  1 +
   3 files changed, 2 insertions(+), 2 deletions(-)
  
  0
   content1_content1_missing-tracked |  1 +
   content1_content2_missing-tracked |  1 +
   content1_missing_missing-tracked  |  1 +
   3 files changed, 3 insertions(+), 0 deletions(-)
  
  $ hg log -T '{rev}\n' --stat 'set:unknown()'
  1
   content1_missing_content1-untracked |  1 -
   content1_missing_content3-untracked |  1 -
   2 files changed, 0 insertions(+), 2 deletions(-)
  
  0
   content1_missing_content1-untracked |  1 +
   content1_missing_content3-untracked |  1 +
   2 files changed, 2 insertions(+), 0 deletions(-)
  
  $ hg log -T '{rev}\n' --stat 'set:clean()'
  1
   content1_content2_content2-tracked |  2 +-
   missing_content2_content2-tracked  |  1 +
   2 files changed, 2 insertions(+), 1 deletions(-)
  
  0
   content1_content1_content1-tracked |  1 +
   content1_content2_content2-tracked |  1 +
   2 files changed, 2 insertions(+), 0 deletions(-)
  
Test revert

  $ hg revert 'set:modified()'
  reverting content1_content1_content3-tracked
  reverting content1_content2_content1-tracked
  reverting content1_content2_content3-tracked
  reverting missing_content2_content3-tracked

  $ hg revert 'set:added()'
  forgetting content1_missing_content1-tracked
  forgetting content1_missing_content3-tracked
  forgetting missing_missing_content3-tracked

  $ hg revert 'set:removed()'
  undeleting content1_content1_content1-untracked
  undeleting content1_content1_content3-untracked
  undeleting content1_content1_missing-untracked
  undeleting content1_content2_content1-untracked
  undeleting content1_content2_content2-untracked
  undeleting content1_content2_content3-untracked
  undeleting content1_content2_missing-untracked
  undeleting missing_content2_content2-untracked
  undeleting missing_content2_content3-untracked
  undeleting missing_content2_missing-untracked

  $ hg revert 'set:deleted()'
  reverting content1_content1_missing-tracked
  reverting content1_content2_missing-tracked
  forgetting content1_missing_missing-tracked
  reverting missing_content2_missing-tracked
  forgetting missing_missing_missing-tracked

  $ hg revert 'set:unknown()'

  $ hg revert 'set:clean()'