git-commit-vandalism/t/t1414-reflog-walk.sh
Han-Wen Nienhuys 41e2e177c7 t1414: mark corruption test with REFFILES
The test checks what happens if reflog and ref database disagree on the state of
the latest commit. This seems to require accessing reflog storage directly.

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-06-02 10:01:55 +09:00

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#!/bin/sh
test_description='various tests of reflog walk (log -g) behavior'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
test_expect_success 'set up some reflog entries' '
test_commit one &&
test_commit two &&
git checkout -b side HEAD^ &&
test_commit three &&
git merge --no-commit main &&
echo evil-merge-content >>one.t &&
test_tick &&
git commit --no-edit -a
'
do_walk () {
git log -g --format="%gd %gs" "$@"
}
test_expect_success 'set up expected reflog' '
cat >expect.all <<-EOF
HEAD@{0} commit (merge): Merge branch ${SQ}main${SQ} into side
HEAD@{1} commit: three
HEAD@{2} checkout: moving from main to side
HEAD@{3} commit: two
HEAD@{4} commit (initial): one
EOF
'
test_expect_success 'reflog walk shows expected logs' '
do_walk >actual &&
test_cmp expect.all actual
'
test_expect_success 'reflog can limit with --no-merges' '
grep -v merge expect.all >expect &&
do_walk --no-merges >actual &&
test_cmp expect actual
'
test_expect_success 'reflog can limit with pathspecs' '
grep two expect.all >expect &&
do_walk -- two.t >actual &&
test_cmp expect actual
'
test_expect_success 'pathspec limiting handles merges' '
# we pick up:
# - the initial commit of one
# - the checkout back to commit one
# - the evil merge which touched one
sed -n "1p;3p;5p" expect.all >expect &&
do_walk -- one.t >actual &&
test_cmp expect actual
'
test_expect_success '--parents shows true parents' '
# convert newlines to spaces
echo $(git rev-parse HEAD HEAD^1 HEAD^2) >expect &&
git rev-list -g --parents -1 HEAD >actual &&
test_cmp expect actual
'
test_expect_success 'walking multiple reflogs shows all' '
# We expect to see all entries for all reflogs, but interleaved by
# date, with order on the command line breaking ties. We
# can use "sort" on the separate lists to generate this,
# but note two tricks:
#
# 1. We use "{" as the delimiter, which lets us skip to the reflog
# date specifier as our second field, and then our "-n" numeric
# sort ignores the bits after the timestamp.
#
# 2. POSIX leaves undefined whether this is a stable sort or not. So
# we use "-k 1" to ensure that we see HEAD before main before
# side when breaking ties.
{
do_walk --date=unix HEAD &&
do_walk --date=unix side &&
do_walk --date=unix main
} >expect.raw &&
sort -t "{" -k 2nr -k 1 <expect.raw >expect &&
do_walk --date=unix HEAD main side >actual &&
test_cmp expect actual
'
test_expect_success 'date-limiting does not interfere with other logs' '
do_walk HEAD@{1979-01-01} HEAD >actual &&
test_cmp expect.all actual
'
test_expect_success 'min/max age uses entry date to limit' '
# Flip between commits one and two so each ref update actually
# does something (and does not get optimized out). We know
# that the timestamps of those commits will be before our "min".
git update-ref -m before refs/heads/minmax one &&
test_tick &&
min=$test_tick &&
git update-ref -m min refs/heads/minmax two &&
test_tick &&
max=$test_tick &&
git update-ref -m max refs/heads/minmax one &&
test_tick &&
git update-ref -m after refs/heads/minmax two &&
cat >expect <<-\EOF &&
max
min
EOF
git log -g --since=$min --until=$max --format=%gs minmax >actual &&
test_cmp expect actual
'
# Create a situation where the reflog and ref database disagree about the latest
# state of HEAD.
test_expect_success REFFILES 'walk prefers reflog to ref tip' '
head=$(git rev-parse HEAD) &&
one=$(git rev-parse one) &&
ident="$GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE" &&
echo "$head $one $ident broken reflog entry" >>.git/logs/HEAD &&
echo $one >expect &&
git log -g --format=%H -1 >actual &&
test_cmp expect actual
'
test_expect_success 'rev-list -g complains when there are no reflogs' '
test_must_fail git rev-list -g
'
test_done