#!/bin/sh

test_description='Test reflog interaction with detached HEAD'
. ./test-lib.sh

reset_state () {
        git checkout master &&
        cp saved_reflog .git/logs/HEAD
}

test_expect_success setup '
        test_tick &&
        git commit --allow-empty -m initial &&
        git branch side &&
        test_tick &&
        git commit --allow-empty -m second &&
        cat .git/logs/HEAD >saved_reflog
'

test_expect_success baseline '
        reset_state &&
        git rev-parse master master^ >expect &&
        git log -g --format=%H >actual &&
        test_cmp expect actual
'

test_expect_success 'switch to branch' '
        reset_state &&
        git rev-parse side master master^ >expect &&
        git checkout side &&
        git log -g --format=%H >actual &&
        test_cmp expect actual
'

test_expect_success 'detach to other' '
        reset_state &&
        git rev-parse master side master master^ >expect &&
        git checkout side &&
        git checkout master^0 &&
        git log -g --format=%H >actual &&
        test_cmp expect actual
'

test_expect_success 'detach to self' '
        reset_state &&
        git rev-parse master master master^ >expect &&
        git checkout master^0 &&
        git log -g --format=%H >actual &&
        test_cmp expect actual
'

test_expect_success 'attach to self' '
        reset_state &&
        git rev-parse master master master master^ >expect &&
        git checkout master^0 &&
        git checkout master &&
        git log -g --format=%H >actual &&
        test_cmp expect actual
'

test_expect_success 'attach to other' '
        reset_state &&
        git rev-parse side master master master^ >expect &&
        git checkout master^0 &&
        git checkout side &&
        git log -g --format=%H >actual &&
        test_cmp expect actual
'

test_done