tests: add tests and document expectations from visit_children_set in rust
The tests this patch are adding have the form of formal spec in
invariants::visit_children_set::holds,
and then a series of checks that all examples must satisfy this
formal spec.
I tried to make the spec consistent with how this function is used
and how it was originally conceived. This is in conflict with how it's
documented in Rust. Some of the implementations also fail to implement
this spec, which leads to bugs, in particular when complicated patterns
are used with `hg status`.
#require unix-permissions no-root no-windows
Prepare
$ hg init a
$ echo a > a/a
$ hg -R a ci -A -m a
adding a
$ hg clone a b
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
Test that raising an exception in the release function doesn't cause the lock to choke
$ cat > testlock.py << EOF
> from mercurial import error, registrar
>
> cmdtable = {}
> command = registrar.command(cmdtable)
>
> def acquiretestlock(repo, releaseexc):
> def unlock():
> if releaseexc:
> raise error.Abort(b'expected release exception')
> l = repo._lock(repo.vfs, b'testlock', False, unlock, None, b'test lock')
> return l
>
> @command(b'testlockexc')
> def testlockexc(ui, repo):
> testlock = acquiretestlock(repo, True)
> try:
> testlock.release()
> finally:
> try:
> testlock = acquiretestlock(repo, False)
> except error.LockHeld:
> raise error.Abort(b'lockfile on disk even after releasing!')
> testlock.release()
> EOF
$ cat >> $HGRCPATH << EOF
> [extensions]
> testlock=$TESTTMP/testlock.py
> EOF
$ hg -R b testlockexc
abort: expected release exception
[255]
One process waiting for another
$ SYNC_FILE_LOCKED="$TESTTMP/sync-file-locked"
$ export SYNC_FILE_LOCKED
$ SYNC_FILE_TRYING_LOCK="$TESTTMP/sync-file-trying-lock"
$ export SYNC_FILE_TRYING_LOCK
$ cat << EOF > locker.sh
> $RUNTESTDIR/testlib/wait-on-file 10 $SYNC_FILE_TRYING_LOCK $SYNC_FILE_LOCKED;
> EOF
$ cat << EOF > waiter.sh
> $RUNTESTDIR/testlib/wait-on-file 10 $SYNC_FILE_LOCKED;
> EOF
$ clean_sync() {
> rm -f "$SYNC_FILE_LOCKED"
> rm -f "$SYNC_FILE_TRYING_LOCK"
> }
$ clean_sync
$ echo b > b/b
$ hg -R b ci -A -m b \
> --config hooks.precommit="sh $TESTTMP/locker.sh" \
> > stdout &
$ hg -R b up -q \
> --config ui.timeout.warn=0 \
> --config hooks.pre-update="sh $TESTTMP/waiter.sh" \
> --config devel.lock-wait-sync-file="$SYNC_FILE_TRYING_LOCK" \
> > preup-stdout 2> preup-stderr
$ wait
$ cat preup-stdout
$ cat preup-stderr
waiting for lock on working directory of b held by process '*' on host '*' (glob)
got lock after * seconds (glob)
$ cat stdout
adding b
On processs waiting on another, warning after a long time.
$ clean_sync
$ echo b > b/c
$ hg -R b ci -A -m b \
> --config hooks.precommit="sh $TESTTMP/locker.sh" \
> > stdout &
$ hg -R b up -q \
> --config hooks.pre-update="sh $TESTTMP/waiter.sh" \
> --config devel.lock-wait-sync-file="$SYNC_FILE_TRYING_LOCK" \
> --config ui.timeout.warn=250 \
> > preup-stdout 2> preup-stderr
$ wait
$ cat preup-stdout
$ cat preup-stderr
$ cat stdout
adding c
On processs waiting on another, warning disabled.
$ clean_sync
$ echo b > b/d
$ hg -R b ci -A -m b \
> --config hooks.precommit="sh $TESTTMP/locker.sh" \
> > stdout &
$ hg -R b up -q \
> --config hooks.pre-update="sh $TESTTMP/waiter.sh" \
> --config devel.lock-wait-sync-file="$SYNC_FILE_TRYING_LOCK" \
> --config ui.timeout.warn=-1 \
> > preup-stdout 2>preup-stderr
$ wait
$ cat preup-stdout
$ cat preup-stderr
$ cat stdout
adding d
check we still print debug output
On processs waiting on another, warning after a long time (debug output on)
$ clean_sync
$ echo b > b/e
$ hg -R b ci -A -m b \
> --config hooks.precommit="sh $TESTTMP/locker.sh" \
> > stdout &
$ hg -R b up \
> --config hooks.pre-update="sh $TESTTMP/waiter.sh" \
> --config devel.lock-wait-sync-file="$SYNC_FILE_TRYING_LOCK" \
> --config ui.timeout.warn=250 --debug \
> > preup-stdout 2>preup-stderr
$ wait
$ cat preup-stdout
running hook pre-update: sh $TESTTMP/waiter.sh
waiting for lock on working directory of b held by process '*' on host '*' (glob)
got lock after * seconds (glob)
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cat preup-stderr
$ cat stdout
adding e
On processs waiting on another, warning disabled, (debug output on)
$ clean_sync
$ echo b > b/f
$ hg -R b ci -A -m b \
> --config hooks.precommit="sh $TESTTMP/locker.sh" \
> > stdout &
$ hg -R b up \
> --config hooks.pre-update="sh $TESTTMP/waiter.sh" \
> --config devel.lock-wait-sync-file="$SYNC_FILE_TRYING_LOCK" \
> --config ui.timeout.warn=-1 --debug\
> > preup-stdout 2>preup-stderr
$ wait
$ cat preup-stdout
running hook pre-update: sh $TESTTMP/waiter.sh
waiting for lock on working directory of b held by process '*' on host '*' (glob)
got lock after * seconds (glob)
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cat preup-stderr
$ cat stdout
adding f
Pushing to a local read-only repo that can't be locked
$ chmod 100 a/.hg/store
$ hg -R b push a
pushing to a
searching for changes
abort: could not lock repository a: $EACCES$
[20]
$ chmod 700 a/.hg/store