#!/usr/bin/env bash

# Licensed to the Apache Software Foundation (ASF) under one or more

# contributor license agreements. See the NOTICE file distributed with

# this work for additional information regarding copyright ownership.

# The ASF licenses this file to You under the Apache License, Version 2.0

# (the "License"); you may not use this file except in compliance with

# the License. You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

load functions_test_helper

TESTREPOS=()

init_test_repo() {

local repodir

repodir=$(mktemp -d /tmp/yetus-bats-XXXXXX)

TESTREPOS+=("${repodir}")

unset GIT_DIR GIT_WORK_TREE GIT_DISCOVERY_ACROSS_FILESYSTEM

export GIT_CEILING_DIRECTORIES=/tmp

pushd "${repodir}" >/dev/null || return 1

git init -q --initial-branch=main

git config user.email "test@test.com"

git config user.name "Test"

git config commit.gpgsign false

git config tag.gpgsign false

git config core.hooksPath /dev/null

}

teardown() {

popd >/dev/null 2>&1 || true

for d in "${TESTREPOS[@]}"; do

rm -rf "${d}"

done

TESTREPOS=()

if [[ -n "${TMP}" ]]; then

rm -rf "${TMP}"

fi

}

@test "git diff --binary round-trip preserves binary content" {

init_test_repo

echo "initial" > readme.txt

git add readme.txt

git commit -q -m "initial"

git checkout -q -b feature

printf '\x00\x01\x02\x03BINARY\xff\xfe' > binary.dat

echo "modified" > readme.txt

git add binary.dat readme.txt

git commit -q -m "add binary"

local merge_base

merge_base=$(git merge-base main feature)

git diff --binary "${merge_base}..feature" > "${TESTREPOS[0]}/test.diff"

git checkout -q main

git apply --binary "${TESTREPOS[0]}/test.diff"

[ -f binary.dat ]

local actual

actual=$(od -A n -t x1 binary.dat | tr -d ' \n')

[ "${actual}" = "0001020342494e415259fffe" ] # pragma: allowlist secret

[ "$(cat readme.txt)" = "modified" ]

}

@test "YETUS-983: format-patch leaves stale file after add-delete, cumulative diff does not" {

init_test_repo

echo "initial" > Helper.java

git add -A && git commit -q -m "initial"

git checkout -q -b feature

printf 'public class BigController {\n public void doStuff() {}\n}\n' > BigController.java

git add BigController.java && git commit -q -m "add BigController"

printf 'public class BigController {\n public void doStuff() {}\n public void doMore() {}\n}\n' > BigController.java

git add -A && git commit -q -m "modify BigController"

git rm -q BigController.java

printf 'public class SmallController {\n public void doStuff() {}\n}\n' > SmallController.java

git add -A && git commit -q -m "replace BigController with SmallController"

printf 'public class SmallController {\n public void doStuff() {}\n public void doExtra() {}\n}\n' > SmallController.java

git add -A && git commit -q -m "modify SmallController"

local merge_base patchfile difffile tmpfiles

merge_base=$(git merge-base main feature)

tmpfiles=$(mktemp -d /tmp/yetus-bats-XXXXXX)

TESTREPOS+=("${tmpfiles}")

patchfile="${tmpfiles}/multi.patch"

difffile="${tmpfiles}/cumulative.diff"

git format-patch --stdout "${merge_base}..feature" > "${patchfile}"

git diff --binary "${merge_base}..feature" > "${difffile}"

# format-patch dry-run passes (this is the YETUS-983 trap)

git checkout -q main

git apply --binary --check -p1 "${patchfile}"

# format-patch actual apply "succeeds" but leaves stale file

git apply --binary -p1 "${patchfile}"

[ -f BigController.java ]

# cumulative diff produces correct tree

git checkout -f -q main

git clean -fd -q

git apply --binary -p1 "${difffile}"

[ ! -f BigController.java ]

[ -f SmallController.java ]

}