#!/bin/sh

test_description='test cherry-picking many commits'

. ./test-lib.sh

check_head_differs_from() {
        head=$(git rev-parse --verify HEAD) &&
        arg=$(git rev-parse --verify "$1") &&
        test "$head" != "$arg"
}

check_head_equals() {
        head=$(git rev-parse --verify HEAD) &&
        arg=$(git rev-parse --verify "$1") &&
        test "$head" = "$arg"
}

test_expect_success setup '
        echo first > file1 &&
        git add file1 &&
        test_tick &&
        git commit -m "first" &&
        git tag first &&

        git checkout -b other &&
        for val in second third fourth
        do
                echo $val >> file1 &&
                git add file1 &&
                test_tick &&
                git commit -m "$val" &&
                git tag $val
        done
'

test_expect_success 'cherry-pick first..fourth works' '
        git checkout -f master &&
        git reset --hard first &&
        test_tick &&
        git cherry-pick first..fourth &&
        git diff --quiet other &&
        git diff --quiet HEAD other &&
        check_head_differs_from fourth
'

test_expect_success 'cherry-pick three one two works' '
        git checkout -f first &&
        test_commit one &&
        test_commit two &&
        test_commit three &&
        git checkout -f master &&
        git reset --hard first &&
        git cherry-pick three one two &&
        git diff --quiet three &&
        git diff --quiet HEAD three &&
        test "$(git log --reverse --format=%s first..)" = "three
one
two"
'

test_expect_success 'output to keep user entertained during multi-pick' '
        cat <<-\EOF >expected &&
        [master OBJID] second
         Author: A U Thor <author@example.com>
         1 file changed, 1 insertion(+)
        [master OBJID] third
         Author: A U Thor <author@example.com>
         1 file changed, 1 insertion(+)
        [master OBJID] fourth
         Author: A U Thor <author@example.com>
         1 file changed, 1 insertion(+)
        EOF

        git checkout -f master &&
        git reset --hard first &&
        test_tick &&
        git cherry-pick first..fourth >actual &&
        sed -e "s/$_x05[0-9a-f][0-9a-f]/OBJID/" <actual >actual.fuzzy &&
        test_line_count -ge 3 actual.fuzzy &&
        test_i18ncmp expected actual.fuzzy
'

test_expect_success 'cherry-pick --strategy resolve first..fourth works' '
        git checkout -f master &&
        git reset --hard first &&
        test_tick &&
        git cherry-pick --strategy resolve first..fourth &&
        git diff --quiet other &&
        git diff --quiet HEAD other &&
        check_head_differs_from fourth
'

test_expect_success 'output during multi-pick indicates merge strategy' '
        cat <<-\EOF >expected &&
        Trying simple merge.
        [master OBJID] second
         Author: A U Thor <author@example.com>
         1 file changed, 1 insertion(+)
        Trying simple merge.
        [master OBJID] third
         Author: A U Thor <author@example.com>
         1 file changed, 1 insertion(+)
        Trying simple merge.
        [master OBJID] fourth
         Author: A U Thor <author@example.com>
         1 file changed, 1 insertion(+)
        EOF

        git checkout -f master &&
        git reset --hard first &&
        test_tick &&
        git cherry-pick --strategy resolve first..fourth >actual &&
        sed -e "s/$_x05[0-9a-f][0-9a-f]/OBJID/" <actual >actual.fuzzy &&
        test_i18ncmp expected actual.fuzzy
'

test_expect_success 'cherry-pick --ff first..fourth works' '
        git checkout -f master &&
        git reset --hard first &&
        test_tick &&
        git cherry-pick --ff first..fourth &&
        git diff --quiet other &&
        git diff --quiet HEAD other &&
        check_head_equals fourth
'

test_expect_success 'cherry-pick -n first..fourth works' '
        git checkout -f master &&
        git reset --hard first &&
        test_tick &&
        git cherry-pick -n first..fourth &&
        git diff --quiet other &&
        git diff --cached --quiet other &&
        git diff --quiet HEAD first
'

test_expect_success 'revert first..fourth works' '
        git checkout -f master &&
        git reset --hard fourth &&
        test_tick &&
        git revert first..fourth &&
        git diff --quiet first &&
        git diff --cached --quiet first &&
        git diff --quiet HEAD first
'

test_expect_success 'revert ^first fourth works' '
        git checkout -f master &&
        git reset --hard fourth &&
        test_tick &&
        git revert ^first fourth &&
        git diff --quiet first &&
        git diff --cached --quiet first &&
        git diff --quiet HEAD first
'

test_expect_success 'revert fourth fourth~1 fourth~2 works' '
        git checkout -f master &&
        git reset --hard fourth &&
        test_tick &&
        git revert fourth fourth~1 fourth~2 &&
        git diff --quiet first &&
        git diff --cached --quiet first &&
        git diff --quiet HEAD first
'

test_expect_success 'cherry-pick -3 fourth works' '
        git checkout -f master &&
        git reset --hard first &&
        test_tick &&
        git cherry-pick -3 fourth &&
        git diff --quiet other &&
        git diff --quiet HEAD other &&
        check_head_differs_from fourth
'

test_expect_success 'cherry-pick --stdin works' '
        git checkout -f master &&
        git reset --hard first &&
        test_tick &&
        git rev-list --reverse first..fourth | git cherry-pick --stdin &&
        git diff --quiet other &&
        git diff --quiet HEAD other &&
        check_head_differs_from fourth
'

test_done