#!/bin/sh
#
# Copyright (c) 2006 Junio C Hamano
#

test_description='git-checkout tests.

Creates master, forks renamer and side branches from it.
Test switching across them.

  ! [master] Initial A one, A two
   * [renamer] Renamer R one->uno, M two
    ! [side] Side M one, D two, A three
  ---
    + [side] Side M one, D two, A three
   *  [renamer] Renamer R one->uno, M two
  +*+ [master] Initial A one, A two

'

. ./test-lib.sh

fill () {
        for i
        do
                echo "$i"
        done
}


test_expect_success setup '

        fill 1 2 3 4 5 6 7 8 >one &&
        fill a b c d e >two &&
        git add one two &&
        git commit -m "Initial A one, A two" &&

        git checkout -b renamer &&
        rm -f one &&
        fill 1 3 4 5 6 7 8 >uno &&
        git add uno &&
        fill a b c d e f >two &&
        git commit -a -m "Renamer R one->uno, M two" &&

        git checkout -b side master &&
        fill 1 2 3 4 5 6 7 >one &&
        fill A B C D E >three &&
        rm -f two &&
        git update-index --add --remove one two three &&
        git commit -m "Side M one, D two, A three" &&

        git checkout master
'

test_expect_success "checkout from non-existing branch" '

        git checkout -b delete-me master &&
        rm .git/refs/heads/delete-me &&
        test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
        git checkout master &&
        test refs/heads/master = "$(git symbolic-ref HEAD)"
'

test_expect_success "checkout with dirty tree without -m" '

        fill 0 1 2 3 4 5 6 7 8 >one &&
        if git checkout side
        then
                echo Not happy
                false
        else
                echo "happy - failed correctly"
        fi

'

test_expect_success "checkout -m with dirty tree" '

        git checkout -f master &&
        git clean -f &&

        fill 0 1 2 3 4 5 6 7 8 >one &&
        git checkout -m side &&

        test "$(git symbolic-ref HEAD)" = "refs/heads/side" &&

        fill "M one" "A three" "D       two" >expect.master &&
        git diff --name-status master >current.master &&
        diff expect.master current.master &&

        fill "M one" >expect.side &&
        git diff --name-status side >current.side &&
        diff expect.side current.side &&

        : >expect.index &&
        git diff --cached >current.index &&
        diff expect.index current.index
'

test_expect_success "checkout -m with dirty tree, renamed" '

        git checkout -f master && git clean -f &&

        fill 1 2 3 4 5 7 8 >one &&
        if git checkout renamer
        then
                echo Not happy
                false
        else
                echo "happy - failed correctly"
        fi &&

        git checkout -m renamer &&
        fill 1 3 4 5 7 8 >expect &&
        diff expect uno &&
        ! test -f one &&
        git diff --cached >current &&
        ! test -s current

'

test_expect_success 'checkout -m with merge conflict' '

        git checkout -f master && git clean -f &&

        fill 1 T 3 4 5 6 S 8 >one &&
        if git checkout renamer
        then
                echo Not happy
                false
        else
                echo "happy - failed correctly"
        fi &&

        git checkout -m renamer &&

        git diff master:one :3:uno |
        sed -e "1,/^@@/d" -e "/^ /d" -e "s/^-/d/" -e "s/^+/a/" >current &&
        fill d2 aT d7 aS >expect &&
        diff current expect &&
        git diff --cached two >current &&
        ! test -s current
'

test_expect_success 'checkout to detach HEAD' '

        git checkout -f renamer && git clean -f &&
        git checkout renamer^ &&
        H=$(git rev-parse --verify HEAD) &&
        M=$(git show-ref -s --verify refs/heads/master) &&
        test "z$H" = "z$M" &&
        if git symbolic-ref HEAD >/dev/null 2>&1
        then
                echo "OOPS, HEAD is still symbolic???"
                false
        else
                : happy
        fi
'

test_expect_success 'checkout to detach HEAD with branchname^' '

        git checkout -f master && git clean -f &&
        git checkout renamer^ &&
        H=$(git rev-parse --verify HEAD) &&
        M=$(git show-ref -s --verify refs/heads/master) &&
        test "z$H" = "z$M" &&
        if git symbolic-ref HEAD >/dev/null 2>&1
        then
                echo "OOPS, HEAD is still symbolic???"
                false
        else
                : happy
        fi
'

test_expect_success 'checkout to detach HEAD with HEAD^0' '

        git checkout -f master && git clean -f &&
        git checkout HEAD^0 &&
        H=$(git rev-parse --verify HEAD) &&
        M=$(git show-ref -s --verify refs/heads/master) &&
        test "z$H" = "z$M" &&
        if git symbolic-ref HEAD >/dev/null 2>&1
        then
                echo "OOPS, HEAD is still symbolic???"
                false
        else
                : happy
        fi
'

test_expect_success 'checkout with ambiguous tag/branch names' '

        git tag both side &&
        git branch both master &&
        git reset --hard &&
        git checkout master &&

        git checkout both &&
        H=$(git rev-parse --verify HEAD) &&
        M=$(git show-ref -s --verify refs/heads/master) &&
        test "z$H" = "z$M" &&
        name=$(git symbolic-ref HEAD 2>/dev/null) &&
        test "z$name" = zrefs/heads/both

'

test_expect_success 'checkout with ambiguous tag/branch names' '

        git reset --hard &&
        git checkout master &&

        git tag frotz side &&
        git branch frotz master &&
        git reset --hard &&
        git checkout master &&

        git checkout tags/frotz &&
        H=$(git rev-parse --verify HEAD) &&
        S=$(git show-ref -s --verify refs/heads/side) &&
        test "z$H" = "z$S" &&
        if name=$(git symbolic-ref HEAD 2>/dev/null)
        then
                echo "Bad -- should have detached"
                false
        else
                : happy
        fi

'

test_done