git-commit-vandalism/t/t5307-pack-missing-commit.sh
Derrick Stolee 859fdc0c3c commit-graph: define GIT_TEST_COMMIT_GRAPH
The commit-graph feature is tested in isolation by
t5318-commit-graph.sh and t6600-test-reach.sh, but there are many
more interesting scenarios involving commit walks. Many of these
scenarios are covered by the existing test suite, but we need to
maintain coverage when the optional commit-graph structure is not
present.

To allow running the full test suite with the commit-graph present,
add a new test environment variable, GIT_TEST_COMMIT_GRAPH. Similar
to GIT_TEST_SPLIT_INDEX, this variable makes every Git command try
to load the commit-graph when parsing commits, and writes the
commit-graph file after every 'git commit' command.

There are a few tests that rely on commits not existing in
pack-files to trigger important events, so manually set
GIT_TEST_COMMIT_GRAPH to false for the necessary commands.

There is one test in t6024-recursive-merge.sh that relies on the
merge-base algorithm picking one of two ambiguous merge-bases, and
the commit-graph feature changes which merge-base is picked.

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-29 10:44:31 -07:00

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#!/bin/sh
test_description='pack should notice missing commit objects'
. ./test-lib.sh
test_expect_success setup '
for i in 1 2 3 4 5
do
echo "$i" >"file$i" &&
git add "file$i" &&
test_tick &&
git commit -m "$i" &&
git tag "tag$i"
done &&
obj=$(git rev-parse --verify tag3) &&
fanout=$(expr "$obj" : "\(..\)") &&
remainder=$(expr "$obj" : "..\(.*\)") &&
rm -f ".git/objects/$fanout/$remainder"
'
test_expect_success 'check corruption' '
test_must_fail git fsck
'
test_expect_success 'rev-list notices corruption (1)' '
test_must_fail env GIT_TEST_COMMIT_GRAPH=0 git rev-list HEAD
'
test_expect_success 'rev-list notices corruption (2)' '
test_must_fail env GIT_TEST_COMMIT_GRAPH=0 git rev-list --objects HEAD
'
test_expect_success 'pack-objects notices corruption' '
echo HEAD |
test_must_fail git pack-objects --revs pack
'
test_done