git/t/t4116-apply-reverse.sh
SZEDER Gábor ec21ac8c18 tests: use 'test_must_be_empty' instead of 'test_cmp /dev/null <out>'
Using 'test_must_be_empty' is more idiomatic than 'test_cmp /dev/null
out', and its message on error is perhaps a bit more to the point.

This patch was basically created by running:

  sed -i -e 's%test_cmp /dev/null%test_must_be_empty%' t[0-9]*.sh

with the exception of the change in 'should not fail in an empty repo'
in 't7401-submodule-summary.sh', where it was 'test_cmp output
/dev/null'.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-21 11:48:34 -07:00

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#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
test_description='git apply in reverse
'
. ./test-lib.sh
test_expect_success setup '
for i in a b c d e f g h i j k l m n; do echo $i; done >file1 &&
perl -pe "y/ijk/\\000\\001\\002/" <file1 >file2 &&
git add file1 file2 &&
git commit -m initial &&
git tag initial &&
for i in a b c g h i J K L m o n p q; do echo $i; done >file1 &&
perl -pe "y/mon/\\000\\001\\002/" <file1 >file2 &&
git commit -a -m second &&
git tag second &&
git diff --binary initial second >patch
'
test_expect_success 'apply in forward' '
T0=$(git rev-parse "second^{tree}") &&
git reset --hard initial &&
git apply --index --binary patch &&
T1=$(git write-tree) &&
test "$T0" = "$T1"
'
test_expect_success 'apply in reverse' '
git reset --hard second &&
git apply --reverse --binary --index patch &&
git diff >diff &&
test_must_be_empty diff
'
test_expect_success 'setup separate repository lacking postimage' '
git archive --format=tar --prefix=initial/ initial | $TAR xf - &&
(
cd initial && git init && git add .
) &&
git archive --format=tar --prefix=second/ second | $TAR xf - &&
(
cd second && git init && git add .
)
'
test_expect_success 'apply in forward without postimage' '
T0=$(git rev-parse "second^{tree}") &&
(
cd initial &&
git apply --index --binary ../patch &&
T1=$(git write-tree) &&
test "$T0" = "$T1"
)
'
test_expect_success 'apply in reverse without postimage' '
T0=$(git rev-parse "initial^{tree}") &&
(
cd second &&
git apply --index --binary --reverse ../patch &&
T1=$(git write-tree) &&
test "$T0" = "$T1"
)
'
test_expect_success 'reversing a whitespace introduction' '
sed "s/a/a /" < file1 > file1.new &&
mv file1.new file1 &&
git diff | git apply --reverse --whitespace=error
'
test_done