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git/t/t4104-apply-boundary.sh
Junio C Hamano ee5a317e01 Fix "git apply" to correctly enforce "match at the beginning"
An earlier commit 4be6096 (apply --unidiff-zero: loosen sanity checks for
--unidiff=0 patches, 2006-09-17) made match_beginning and match_end
computed incorrectly.  If a hunk inserts at the beginning, old position
recorded at the hunk is line 0, and if a hunk changes at the beginning, it
is line 1.  The new test added to t4104 exposes that the old code did not
insist on matching at the beginning for a patch to add a line to an empty
file.

An even older 65aadb9 (apply: force matching at the beginning.,
2006-05-24) was equally wrong in that it tried to take hints from the
number of leading context lines, to decide if the hunk must match at the
beginning, but we can just look at the line number in the hunk to decide.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-04-06 19:21:45 -07:00

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#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
test_description='git apply boundary tests
'
. ./test-lib.sh
L="c d e f g h i j k l m n o p q r s t u v w x"
test_expect_success setup '
for i in b '"$L"' y
do
echo $i
done >victim &&
cat victim >original &&
git update-index --add victim &&
: add to the head
for i in a b '"$L"' y
do
echo $i
done >victim &&
cat victim >add-a-expect &&
git diff victim >add-a-patch.with &&
git diff --unified=0 >add-a-patch.without &&
: modify at the head
for i in a '"$L"' y
do
echo $i
done >victim &&
cat victim >mod-a-expect &&
git diff victim >mod-a-patch.with &&
git diff --unified=0 >mod-a-patch.without &&
: remove from the head
for i in '"$L"' y
do
echo $i
done >victim &&
cat victim >del-a-expect &&
git diff victim >del-a-patch.with
git diff --unified=0 >del-a-patch.without &&
: add to the tail
for i in b '"$L"' y z
do
echo $i
done >victim &&
cat victim >add-z-expect &&
git diff victim >add-z-patch.with &&
git diff --unified=0 >add-z-patch.without &&
: modify at the tail
for i in a '"$L"' y
do
echo $i
done >victim &&
cat victim >mod-z-expect &&
git diff victim >mod-z-patch.with &&
git diff --unified=0 >mod-z-patch.without &&
: remove from the tail
for i in b '"$L"'
do
echo $i
done >victim &&
cat victim >del-z-expect &&
git diff victim >del-z-patch.with
git diff --unified=0 >del-z-patch.without &&
: done
'
for with in with without
do
case "$with" in
with) u= ;;
without) u='--unidiff-zero ' ;;
esac
for kind in add-a add-z mod-a mod-z del-a del-z
do
test_expect_success "apply $kind-patch $with context" '
cat original >victim &&
git update-index victim &&
git apply --index '"$u$kind-patch.$with"' || {
cat '"$kind-patch.$with"'
(exit 1)
} &&
git diff '"$kind"'-expect victim
'
done
done
for kind in add-a add-z mod-a mod-z del-a del-z
do
rm -f $kind-ng.without
sed -e "s/^diff --git /diff /" \
-e '/^index /d' \
<$kind-patch.without >$kind-ng.without
test_expect_success "apply non-git $kind-patch without context" '
cat original >victim &&
git update-index victim &&
git apply --unidiff-zero --index '"$kind-ng.without"' || {
cat '"$kind-ng.without"'
(exit 1)
} &&
git diff '"$kind"'-expect victim
'
done
test_expect_success 'two lines' '
>file &&
git add file &&
echo aaa >file &&
git diff >patch &&
git add file &&
echo bbb >file &&
git add file &&
test_must_fail git apply --check patch
'
test_done