Mercurial > hg
view tests/test-fastannotate-protocol.t @ 41506:3e89736b98ce
py3: conditionalize test-demandimport.py for Python 3
The Python 3 lazy importer uses the LazyLoader that is part of
importlib.
On Python 3 and later, LazyLoader is implemented using a custom module
type that defines a __getattribute__ which triggers module loading.
Furthermore, there are additional differences as well. For example,
it appears that Python 3 will return an existing sys.modules
entry instead of constructing a new module object.
This commit adds additional test coverage for lazy importing
behavior to cover the differences between Python 2 and 3. This
reveals that the test and some lazy import functionality is kinda
busted. For example, the test assumes "contextlib" will be lazy.
But in reality an import before it has already imported contextlib!
There's definitely room to improve the behavior of the demand
importer code, both for Python 2 and 3. But at least the test
passes on Python 3 now.
Differential Revision: https://phab.mercurial-scm.org/D5796
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Fri, 01 Feb 2019 16:47:29 -0800 |
parents | d8a7690ccc74 |
children | 7116fc614cfc |
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$ cat >> $HGRCPATH << EOF > [ui] > ssh = "$PYTHON" "$TESTDIR/dummyssh" > [extensions] > fastannotate= > [fastannotate] > mainbranch=@ > EOF $ HGMERGE=true; export HGMERGE setup the server repo $ hg init repo-server $ cd repo-server $ cat >> .hg/hgrc << EOF > [fastannotate] > server=1 > EOF $ for i in 1 2 3 4; do > echo $i >> a > hg commit -A -m $i a > done $ [ -d .hg/fastannotate ] [1] $ hg bookmark @ $ cd .. setup the local repo $ hg clone 'ssh://user@dummy/repo-server' repo-local -q $ cd repo-local $ cat >> .hg/hgrc << EOF > [fastannotate] > client=1 > clientfetchthreshold=0 > EOF $ [ -d .hg/fastannotate ] [1] $ hg fastannotate a --debug running * (glob) sending hello command sending between command remote: * (glob) (?) remote: capabilities: * (glob) remote: * (glob) (?) sending protocaps command fastannotate: requesting 1 files sending getannotate command fastannotate: writing 112 bytes to fastannotate/default/a.l fastannotate: writing 94 bytes to fastannotate/default/a.m fastannotate: a: using fast path (resolved fctx: True) 0: 1 1: 2 2: 3 3: 4 the cache could be reused and no download is necessary $ hg fastannotate a --debug fastannotate: a: using fast path (resolved fctx: True) 0: 1 1: 2 2: 3 3: 4 if the client agrees where the head of the master branch is, no re-download happens even if the client has more commits $ echo 5 >> a $ hg commit -m 5 $ hg bookmark -r 3 @ -f $ hg fastannotate a --debug 0: 1 1: 2 2: 3 3: 4 4: 5 if the client has a different "@" (head of the master branch) and "@" is ahead of the server, the server can detect things are unchanged and does not return full contents (not that there is no "writing ... to fastannotate"), but the client can also build things up on its own (causing diverge) $ hg bookmark -r 4 @ -f $ hg fastannotate a --debug running * (glob) sending hello command sending between command remote: * (glob) (?) remote: capabilities: * (glob) remote: * (glob) (?) sending protocaps command fastannotate: requesting 1 files sending getannotate command fastannotate: a: 1 new changesets in the main branch 0: 1 1: 2 2: 3 3: 4 4: 5 if the client has a different "@" which is behind the server. no download is necessary $ hg fastannotate a --debug --config fastannotate.mainbranch=2 fastannotate: a: using fast path (resolved fctx: True) 0: 1 1: 2 2: 3 3: 4 4: 5 define fastannotate on-disk paths $ p1=.hg/fastannotate/default $ p2=../repo-server/.hg/fastannotate/default revert bookmark change so the client is behind the server $ hg bookmark -r 2 @ -f in the "fctx" mode with the "annotate" command, the client also downloads the cache. but not in the (default) "fastannotate" mode. $ rm $p1/a.l $p1/a.m $ hg annotate a --debug | grep 'fastannotate: writing' [1] $ hg annotate a --config fastannotate.modes=fctx --debug | grep 'fastannotate: writing' | sort fastannotate: writing 112 bytes to fastannotate/default/a.l fastannotate: writing 94 bytes to fastannotate/default/a.m the fastannotate cache (built server-side, downloaded client-side) in two repos have the same content (because the client downloads from the server) $ diff $p1/a.l $p2/a.l $ diff $p1/a.m $p2/a.m in the "fctx" mode, the client could also build the cache locally $ hg annotate a --config fastannotate.modes=fctx --debug --config fastannotate.mainbranch=4 | grep fastannotate fastannotate: requesting 1 files fastannotate: a: 1 new changesets in the main branch the server would rebuild broken cache automatically $ cp $p2/a.m $p2/a.m.bak $ echo BROKEN1 > $p1/a.m $ echo BROKEN2 > $p2/a.m $ hg fastannotate a --debug | grep 'fastannotate: writing' | sort fastannotate: writing 112 bytes to fastannotate/default/a.l fastannotate: writing 94 bytes to fastannotate/default/a.m $ diff $p1/a.m $p2/a.m $ diff $p2/a.m $p2/a.m.bak use the "debugbuildannotatecache" command to build annotate cache $ rm -rf $p1 $p2 $ hg --cwd ../repo-server debugbuildannotatecache a --debug fastannotate: a: 4 new changesets in the main branch $ hg --cwd ../repo-local debugbuildannotatecache a --debug running * (glob) sending hello command sending between command remote: * (glob) (?) remote: capabilities: * (glob) remote: * (glob) (?) sending protocaps command fastannotate: requesting 1 files sending getannotate command fastannotate: writing * (glob) fastannotate: writing * (glob) $ diff $p1/a.l $p2/a.l $ diff $p1/a.m $p2/a.m with the clientfetchthreshold config option, the client can build up the cache without downloading from the server $ rm -rf $p1 $ hg fastannotate a --debug --config fastannotate.clientfetchthreshold=10 fastannotate: a: 3 new changesets in the main branch 0: 1 1: 2 2: 3 3: 4 4: 5 if the fastannotate directory is not writable, the fctx mode still works $ rm -rf $p1 $ touch $p1 $ hg annotate a --debug --traceback --config fastannotate.modes=fctx fastannotate: a: cache broken and deleted fastannotate: prefetch failed: * (glob) fastannotate: a: cache broken and deleted fastannotate: falling back to the vanilla annotate: * (glob) 0: 1 1: 2 2: 3 3: 4 4: 5 with serverbuildondemand=False, the server will not build anything $ cat >> ../repo-server/.hg/hgrc <<EOF > [fastannotate] > serverbuildondemand=False > EOF $ rm -rf $p1 $p2 $ hg fastannotate a --debug | grep 'fastannotate: writing' [1]