git-commit-vandalism/t/t3409-rebase-preserve-merges.sh

#!/bin/sh
#
# Copyright(C) 2008 Stephen Habermann & Andreas Ericsson
#
test_description='git rebase -p should preserve merges

Run "git rebase -p" and check that merges are properly carried along
'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

. ./test-lib.sh

if ! test_have_prereq REBASE_P; then
	skip_all='skipping git rebase -p tests, as asked for'
	test_done
fi

GIT_AUTHOR_EMAIL=bogus_email_address
export GIT_AUTHOR_EMAIL

# Clone 2 (conflicting merge):
#
# A1--A2--B3   <-- origin/main
#  \       \
#   B1------M  <-- topic
#    \
#     B2       <-- origin/topic
#
# Clone 3 (no-ff merge):
#
# A1--A2--B3   <-- origin/main
#  \
#   B1------M  <-- topic
#    \     /
#     \--A3    <-- topic2
#      \
#       B2     <-- origin/topic
#
# Clone 4 (same as Clone 3)

test_expect_success 'setup for merge-preserving rebase' \
	'echo First > A &&
	git add A &&
	git commit -m "Add A1" &&
	git checkout -b topic &&
	echo Second > B &&
	git add B &&
	git commit -m "Add B1" &&
	git checkout -f main &&
	echo Third >> A &&
	git commit -a -m "Modify A2" &&
	echo Fifth > B &&
	git add B &&
	git commit -m "Add different B" &&

	git clone ./. clone2 &&
	(
		cd clone2 &&
		git checkout -b topic origin/topic &&
		test_must_fail git merge origin/main &&
		echo Resolved >B &&
		git add B &&
		git commit -m "Merge origin/main into topic"
	) &&

	git clone ./. clone3 &&
	(
		cd clone3 &&
		git checkout -b topic2 origin/topic &&
		echo Sixth > A &&
		git commit -a -m "Modify A3" &&
		git checkout -b topic origin/topic &&
		git merge --no-ff topic2
	) &&

	git clone ./. clone4 &&
	(
		cd clone4 &&
		git checkout -b topic2 origin/topic &&
		echo Sixth > A &&
		git commit -a -m "Modify A3" &&
		git checkout -b topic origin/topic &&
		git merge --no-ff topic2
	) &&

	git checkout topic &&
	echo Fourth >> B &&
	git commit -a -m "Modify B2"
'

test_expect_success '--continue works after a conflict' '
	(
	cd clone2 &&
	git fetch &&
	test_must_fail git rebase -p origin/topic &&
	test 2 = $(git ls-files B | wc -l) &&
	echo Resolved again > B &&
	test_must_fail git rebase --continue &&
	grep "^@@@ " .git/rebase-merge/patch &&
	git add B &&
	git rebase --continue &&
	test 1 = $(git rev-list --all --pretty=oneline | grep "Modify A" | wc -l) &&
	test 1 = $(git rev-list --all --pretty=oneline | grep "Add different" | wc -l) &&
	test 1 = $(git rev-list --all --pretty=oneline | grep "Merge origin" | wc -l)
	)
'

test_expect_success 'rebase -p preserves no-ff merges' '
	(
	cd clone3 &&
	git fetch &&
	git rebase -p origin/topic &&
	test 3 = $(git rev-list --all --pretty=oneline | grep "Modify A" | wc -l) &&
	test 1 = $(git rev-list --all --pretty=oneline | grep "Merge branch" | wc -l)
	)
'

test_expect_success 'rebase -p ignores merge.log config' '
	(
	cd clone4 &&
	git fetch &&
	git -c merge.log=1 rebase -p origin/topic &&
	echo >expected &&
	git log --format="%b" -1 >current &&
	test_cmp expected current
	)
'

test_done