git/t/t6401-merge-criss-cross.sh

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#!/bin/sh
#
# Copyright (c) 2005 Fredrik Kuivinen
#
# See https://lore.kernel.org/git/Pine.LNX.4.44.0504271254120.4678-100000@wax.eds.org/ for a
# nice description of what this is about.
test_description='Test criss-cross merge'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
test_expect_success 'prepare repository' '
test_write_lines 1 2 3 4 5 6 7 8 9 >file &&
git add file &&
git commit -m "Initial commit" file &&
git branch A &&
git branch B &&
git checkout A &&
test_write_lines 1 2 3 4 5 6 7 "8 changed in B8, branch A" 9 >file &&
git commit -m "B8" file &&
git checkout B &&
test_write_lines 1 2 "3 changed in C3, branch B" 4 5 6 7 8 9 >file &&
git commit -m "C3" file &&
git branch C3 &&
git merge -m "pre E3 merge" A &&
test_write_lines 1 2 "3 changed in E3, branch B. New file size" 4 5 6 7 "8 changed in B8, branch A" 9 >file &&
git commit -m "E3" file &&
git checkout A &&
git merge -m "pre D8 merge" C3 &&
test_write_lines 1 2 "3 changed in C3, branch B" 4 5 6 7 "8 changed in D8, branch A. New file size 2" 9 >file &&
git commit -m D8 file
'
test_expect_success 'Criss-cross merge' '
git merge -m "final merge" B
'
test_expect_success 'Criss-cross merge result' '
cat <<-\EOF >file-expect &&
1
2
3 changed in E3, branch B. New file size
4
5
6
7
8 changed in D8, branch A. New file size 2
9
EOF
test_cmp file-expect file
'
test_expect_success 'Criss-cross merge fails (-s resolve)' '
git reset --hard A^ &&
test_must_fail git merge -s resolve -m "final merge" B
'
test_done