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commit-graph tests: split up corrupt_graph_and_verify()

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Split up the corrupt_graph_and_verify() function added in
d9b9f8a6fd ("commit-graph: verify catches corrupt signature",
2018-06-27) into its logical components of setting up the test itself,
doing the corruption in a particular way with "dd", and then finally
testing that stderr is what we expect.

This allows for re-using everything except the now slimmer
corrupt_graph_and_verify() to corrupt the graph in a way that doesn't
involve inserting a given byte sequence at a given position,
e.g. truncating it entirely to a custom value.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2019-02-21 23:37:46 +01:00 committed by Junio C Hamano
parent 35ee755a8c
commit f6761faaa1
1 changed files with 16 additions and 6 deletions
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22
t/t5318-commit-graph.sh
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@ -366,6 +366,19 @@ GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
corrupt_graph_setup() {
cd "$TRASH_DIRECTORY/full" &&
test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
cp $objdir/info/commit-graph commit-graph-backup
}
corrupt_graph_verify() {
grepstr=$1
test_must_fail git commit-graph verify 2>test_err &&
grep -v "^+" test_err >err &&
test_i18ngrep "$grepstr" err
}
# usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
# Manipulates the commit-graph file at the position
# by inserting the data, optionally zeroing the file
@ -376,17 +389,14 @@ corrupt_graph_and_verify() {
pos=$1
data="${2:-\0}"
grepstr=$3
cd "$TRASH_DIRECTORY/full" &&
corrupt_graph_setup &&
orig_size=$(wc -c < $objdir/info/commit-graph) &&
zero_pos=${4:-${orig_size}} &&
test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
cp $objdir/info/commit-graph commit-graph-backup &&
printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" count=0 &&
generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
test_must_fail git commit-graph verify 2>test_err &&
grep -v "^+" test_err >err &&
test_i18ngrep "$grepstr" err
corrupt_graph_verify "$grepstr"
}
test_expect_success 'detect bad signature' '