git-commit-vandalism/t/t2015-checkout-unborn.sh
Junio C Hamano abe199808c git checkout -b: allow switching out of an unborn branch
Running "git checkout -b another" immediately after "git init" when you do
not even have a commit on 'master' fails with:

    $ git checkout -b another
    fatal: You are on a branch yet to be born

This is unnecessary, if we redefine "git checkout -b $name" that does not
take any $start_point (which has to be a commit) as "I want to check out a
new branch $name from the state I am in".

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-06 16:32:15 -08:00

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#!/bin/sh
test_description='checkout from unborn branch'
. ./test-lib.sh
test_expect_success 'setup' '
mkdir parent &&
(cd parent &&
git init &&
echo content >file &&
git add file &&
git commit -m base
) &&
git fetch parent master:origin
'
test_expect_success 'checkout from unborn preserves untracked files' '
echo precious >expect &&
echo precious >file &&
test_must_fail git checkout -b new origin &&
test_cmp expect file
'
test_expect_success 'checkout from unborn preserves index contents' '
echo precious >expect &&
echo precious >file &&
git add file &&
test_must_fail git checkout -b new origin &&
test_cmp expect file &&
git show :file >file &&
test_cmp expect file
'
test_expect_success 'checkout from unborn merges identical index contents' '
echo content >file &&
git add file &&
git checkout -b new origin
'
test_expect_success 'checking out another branch from unborn state' '
git checkout --orphan newroot &&
git checkout -b anothername &&
test_must_fail git show-ref --verify refs/heads/newroot &&
git symbolic-ref HEAD >actual &&
echo refs/heads/anothername >expect &&
test_cmp expect actual
'
test_done