t7600 (merge): test merge from branch yet to be born

Some people like to "git fetch origin && merge origin/master" from
the unborn branch provided when first initializing a repository.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t7600-merge.sh b/t/t7600-merge.sh
index 6e839a609c7fa255b2b48737ec446aebdb5e86b7..b4f40e4c3a53388e72347e8e3894edd05f17dab5 100755 (executable)
--- a/t/t7600-merge.sh
+++ b/t/t7600-merge.sh
@@ -173,6 +173,27 @@ test_expect_success 'merge c0 with c1 with --ff-only' '
 
 test_debug 'git log --graph --decorate --oneline --all'
 
+test_expect_success 'merge from unborn branch' '
+       git checkout -f master &&
+       test_might_fail git branch -D kid &&
+
+       echo "OBJID HEAD@{0}: initial pull" >reflog.expected &&
+
+       git checkout --orphan kid &&
+       test_when_finished "git checkout -f master" &&
+       git rm -fr . &&
+       test_tick &&
+       git merge --ff-only c1 &&
+       verify_merge file result.1 &&
+       verify_head "$c1" &&
+
+       git reflog -1 >reflog.actual &&
+       sed "s/$_x05[0-9a-f][0-9a-f]/OBJID/g" reflog.actual >reflog.fuzzy &&
+       test_cmp reflog.expected reflog.fuzzy
+'
+
+test_debug 'git log --graph --decorate --oneline --all'
+
 test_expect_success 'merge c1 with c2' '
        git reset --hard c1 &&
        test_tick &&