t2020-checkout-detach: check for the number of orphaned commits

Change the test that orphans commits to leave 2 commits behind. Add a test
that leaves only one of these behind.

The next patch will truncate the list of orphaned commits earlier. With
this preliminary update, its effect will become more obvious.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t2020-checkout-detach.sh b/t/t2020-checkout-detach.sh
index 068fba4c8e8706aa615d0401da1da47901113156..202ca90c3483837fbbae45c6527c4d55c721dca9 100755 (executable)
--- a/t/t2020-checkout-detach.sh
+++ b/t/t2020-checkout-detach.sh
@@ -11,14 +11,13 @@ check_not_detached () {
        git symbolic-ref -q HEAD >/dev/null
 }
 
-ORPHAN_WARNING='you are leaving .* commit.*behind'
 PREV_HEAD_DESC='Previous HEAD position was'
 check_orphan_warning() {
-       test_i18ngrep "$ORPHAN_WARNING" "$1" &&
+       test_i18ngrep "you are leaving $2 behind" "$1" &&
        test_i18ngrep ! "$PREV_HEAD_DESC" "$1"
 }
 check_no_orphan_warning() {
-       test_i18ngrep ! "$ORPHAN_WARNING" "$1" &&
+       test_i18ngrep ! "you are leaving .* commit.*behind" "$1" &&
        test_i18ngrep "$PREV_HEAD_DESC" "$1"
 }
 
@@ -110,12 +109,24 @@ test_expect_success 'checkout warns on orphan commits' '
        git checkout --detach two &&
        echo content >orphan &&
        git add orphan &&
-       git commit -a -m orphan &&
+       git commit -a -m orphan1 &&
+       echo new content >orphan &&
+       git commit -a -m orphan2 &&
+       orphan2=$(git rev-parse HEAD) &&
        git checkout master 2>stderr
 '
 
 test_expect_success 'checkout warns on orphan commits: output' '
-       check_orphan_warning stderr
+       check_orphan_warning stderr "2 commits"
+'
+
+test_expect_success 'checkout warns orphaning 1 of 2 commits' '
+       git checkout "$orphan2" &&
+       git checkout HEAD^ 2>stderr
+'
+
+test_expect_success 'checkout warns orphaning 1 of 2 commits: output' '
+       check_orphan_warning stderr "2 commits"
 '
 
 test_expect_success 'checkout does not warn leaving ref tip' '