git/t/t4054-diff-bogus-tree.sh
Jeff King 34959d80db t: use hash-object --literally when created malformed objects
Many test scripts use hash-object to create malformed objects to see how
we handle the results in various commands. In some cases we already have
to use "hash-object --literally", because it does some rudimentary
quality checks. But let's use "--literally" more consistently to
future-proof these tests against hash-object learning to be more
careful.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-01-18 12:59:44 -08:00

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#!/bin/sh
test_description='test diff with a bogus tree containing the null sha1'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
test_expect_success 'create bogus tree' '
name=$(echo $ZERO_OID | sed -e "s/00/Q/g") &&
bogus_tree=$(
printf "100644 fooQ$name" |
q_to_nul |
git hash-object --literally -w --stdin -t tree
)
'
test_expect_success 'create tree with matching file' '
echo bar >foo &&
git add foo &&
good_tree=$(git write-tree) &&
blob=$(git rev-parse :foo)
'
test_expect_success 'raw diff shows null sha1 (addition)' '
echo ":000000 100644 $ZERO_OID $ZERO_OID A foo" >expect &&
git diff-tree $EMPTY_TREE $bogus_tree >actual &&
test_cmp expect actual
'
test_expect_success 'raw diff shows null sha1 (removal)' '
echo ":100644 000000 $ZERO_OID $ZERO_OID D foo" >expect &&
git diff-tree $bogus_tree $EMPTY_TREE >actual &&
test_cmp expect actual
'
test_expect_success 'raw diff shows null sha1 (modification)' '
echo ":100644 100644 $blob $ZERO_OID M foo" >expect &&
git diff-tree $good_tree $bogus_tree >actual &&
test_cmp expect actual
'
test_expect_success 'raw diff shows null sha1 (other direction)' '
echo ":100644 100644 $ZERO_OID $blob M foo" >expect &&
git diff-tree $bogus_tree $good_tree >actual &&
test_cmp expect actual
'
test_expect_success 'raw diff shows null sha1 (reverse)' '
echo ":100644 100644 $ZERO_OID $blob M foo" >expect &&
git diff-tree -R $good_tree $bogus_tree >actual &&
test_cmp expect actual
'
test_expect_success 'raw diff shows null sha1 (index)' '
echo ":100644 100644 $ZERO_OID $blob M foo" >expect &&
git diff-index $bogus_tree >actual &&
test_cmp expect actual
'
test_expect_success 'patch fails due to bogus sha1 (addition)' '
test_must_fail git diff-tree -p $EMPTY_TREE $bogus_tree
'
test_expect_success 'patch fails due to bogus sha1 (removal)' '
test_must_fail git diff-tree -p $bogus_tree $EMPTY_TREE
'
test_expect_success 'patch fails due to bogus sha1 (modification)' '
test_must_fail git diff-tree -p $good_tree $bogus_tree
'
test_expect_success 'patch fails due to bogus sha1 (other direction)' '
test_must_fail git diff-tree -p $bogus_tree $good_tree
'
test_expect_success 'patch fails due to bogus sha1 (reverse)' '
test_must_fail git diff-tree -R -p $good_tree $bogus_tree
'
test_expect_success 'patch fails due to bogus sha1 (index)' '
test_must_fail git diff-index -p $bogus_tree
'
test_done