Re: [PATCH v2 7/7] t/helper/simple-ipc: convert test-simple-ipc to use start_bg_command

[Ramsay Jones <ramsay@ramsayjones.plus.com>]

On 10/11/2021 12:27, Johannes Schindelin wrote:
[snip]
>> I cannot give the change any better test than they can, and it is
>> their platform to improve, or break by accident while trying to do
>> so.
> 
> Right. I tested this as well as I could, via the `--stress` option, and am
> fairly confident that it is correct. Since the patch touches only
> `simply-ipc` code, the only test that could possibly affected is t0052,
> and it passes with `--stress` over here (when it failed without the
> patch).
> 
> Ciao,
> Dscho
> 
> P.S.: in case you wondered, no, I did not run the entire test suite. With
> the performance characteristics of the POSIX emulation provided by the
> Cygwin runtime, this would simply take too long. It's not the first time I
> wish our test suite was more efficient, across _all_ supported platforms.


[I seem to have lost Adam's reply about this now being Hunky-Dory, but ...]

I ran the test-suite on -rc2 on thursday night (note _not_ rc2 + this patch)
and it deadlocked on me; I didn't notice for 4 hours, so (in the early hours)
I simply Ctl+C-ed it and went to bed. I haven't had the test-suite deadlock
for many many years - I've been spoilt! ;-)

I tried -rc2 again last night; this time it finished, but I gained another
test failure: t0301-credential-cache.sh. I have _never_ had this test fail
before, so that was unexpected. :(

[Yes, t0052-simple-ipc.sh failed as expected, since this patch was not
applied].

Also, I was half expecting a small speed-up due to the new pipe code in
v3.3.2 of the cygwin dll, but it actually took an hour longer than normal. :(

The only change to my setup, between -rc1 and -rc2, was the cygwin update
to v3.3.2, so this may point to some more fallout from the new pipe code
(maybe?).

Anyway, I haven't even looked at the new failure (see below), which we will
probably not have time to fix before release, so I am just now building
current master (v2.34.0-rc2-16-g5a73c6bdc7) to give that a try. (So, I won't
have anything to report until tomorrow).

Just FYI:

  $ ./t0301-credential-cache.sh
  ...
  not ok 13 - socket defaults to ~/.cache/git/credential/socket
  #
  #               test_when_finished "
  #                       git credential-cache exit &&
  #                       rmdir -p .cache/git/credential/
  #               " &&
  #               test_path_is_missing "$HOME/.git-credential-cache" &&
  #               test_path_is_socket "$HOME/.cache/git/credential/socket"
  #
  ...
  not ok 26 - use custom XDG_CACHE_HOME if set and default sockets are not created
  #
  #               test_when_finished "git credential-cache exit" &&
  #               test_path_is_socket "$XDG_CACHE_HOME/git/credential/socket" &&
  #               test_path_is_missing "$HOME/.git-credential-cache/socket" &&
  #               test_path_is_missing "$HOME/.cache/git/credential/socket"
  #
  not ok 27 - credential-cache --socket option overrides default location
  #
  #               test_when_finished "
  #                       git credential-cache exit --socket \"\$HOME/dir/socket\" &&
  #                       rmdir \"\$HOME/dir\"
  #               " &&
  #               check approve "cache --socket \"\$HOME/dir/socket\"" <<-\EOF &&
  #               protocol=https
  #               host=example.com
  #               username=store-user
  #               password=store-pass
  #               EOF
  #               test_path_is_socket "$HOME/dir/socket"
  #
  not ok 28 - use custom XDG_CACHE_HOME even if xdg socket exists
  #
  #               test_when_finished "
  #                       git credential-cache exit &&
  #                       sane_unset XDG_CACHE_HOME
  #               " &&
  #               check approve cache <<-\EOF &&
  #               protocol=https
  #               host=example.com
  #               username=store-user
  #               password=store-pass
  #               EOF
  #               test_path_is_socket "$HOME/.cache/git/credential/socket" &&
  #               XDG_CACHE_HOME="$HOME/xdg" &&
  #               export XDG_CACHE_HOME &&
  #               check approve cache <<-\EOF &&
  #               protocol=https
  #               host=example.com
  #               username=store-user
  #               password=store-pass
  #               EOF
  #               test_path_is_socket "$XDG_CACHE_HOME/git/credential/socket"
  #
  not ok 29 - use user socket if user directory exists
  #
  #               test_when_finished "
  #                       git credential-cache exit &&
  #                       rmdir \"\$HOME/.git-credential-cache/\"
  #               " &&
  #               mkdir -p "$HOME/.git-credential-cache/" &&
  #               chmod 700 "$HOME/.git-credential-cache/" &&
  #               check approve cache <<-\EOF &&
  #               protocol=https
  #               host=example.com
  #               username=store-user
  #               password=store-pass
  #               EOF
  #               test_path_is_socket "$HOME/.git-credential-cache/socket"
  #
  not ok 30 - use user socket if user directory is a symlink to a directory
  #
  #               test_when_finished "
  #                       git credential-cache exit &&
  #                       rmdir \"\$HOME/dir/\" &&
  #                       rm \"\$HOME/.git-credential-cache\"
  #               " &&
  #               mkdir -p -m 700 "$HOME/dir/" &&
  #               ln -s "$HOME/dir" "$HOME/.git-credential-cache" &&
  #               check approve cache <<-\EOF &&
  #               protocol=https
  #               host=example.com
  #               username=store-user
  #               password=store-pass
  #               EOF
  #               test_path_is_socket "$HOME/.git-credential-cache/socket"
  #
  ok 31 - helper (cache --timeout=1) times out
  # failed 6 among 31 test(s)
  1..31
  $
  
ATB,
Ramsay Jones