#!/bin/sh

test_description='test cherry-picking an empty commit'

. ./test-lib.sh

test_expect_success setup '

        echo first > file1 &&
        git add file1 &&
        test_tick &&
        git commit -m "first" &&

        git checkout -b empty-message-branch &&
        echo third >> file1 &&
        git add file1 &&
        test_tick &&
        git commit --allow-empty-message -m "" &&

        git checkout master &&
        git checkout -b empty-change-branch &&
        test_tick &&
        git commit --allow-empty -m "empty"

'

test_expect_success 'cherry-pick an empty commit' '
        git checkout master &&
        test_expect_code 1 git cherry-pick empty-change-branch
'

test_expect_success 'index lockfile was removed' '
        test ! -f .git/index.lock
'

test_expect_success 'cherry-pick a commit with an empty message' '
        test_when_finished "git reset --hard empty-message-branch~1" &&
        git checkout master &&
        git cherry-pick empty-message-branch
'

test_expect_success 'index lockfile was removed' '
        test ! -f .git/index.lock
'

test_expect_success 'cherry-pick a commit with an empty message with --allow-empty-message' '
        git checkout -f master &&
        git cherry-pick --allow-empty-message empty-message-branch
'

test_expect_success 'cherry pick an empty non-ff commit without --allow-empty' '
        git checkout master &&
        echo fourth >>file2 &&
        git add file2 &&
        git commit -m "fourth" &&
        test_must_fail git cherry-pick empty-change-branch
'

test_expect_success 'cherry pick an empty non-ff commit with --allow-empty' '
        git checkout master &&
        git cherry-pick --allow-empty empty-change-branch
'

test_expect_success 'cherry pick with --keep-redundant-commits' '
        git checkout master &&
        git cherry-pick --keep-redundant-commits HEAD^
'

test_expect_success 'cherry-pick a commit that becomes no-op (prep)' '
        git checkout master &&
        git branch fork &&
        echo foo >file2 &&
        git add file2 &&
        test_tick &&
        git commit -m "add file2 on master" &&

        git checkout fork &&
        echo foo >file2 &&
        git add file2 &&
        test_tick &&
        git commit -m "add file2 on the side"
'

test_expect_success 'cherry-pick a no-op without --keep-redundant' '
        git reset --hard &&
        git checkout fork^0 &&
        test_must_fail git cherry-pick master
'

test_expect_success 'cherry-pick a no-op with --keep-redundant' '
        git reset --hard &&
        git checkout fork^0 &&
        git cherry-pick --keep-redundant-commits master &&
        git show -s --format=%s >actual &&
        echo "add file2 on master" >expect &&
        test_cmp expect actual
'

test_done