1 files changed, 72 insertions, 0 deletions
diff --git a/t/t1413-reflog-detach.sh b/t/t1413-reflog-detach.sh
new file mode 100755
index 0000000..934688a
--- /dev/null
+++ b/t/t1413-reflog-detach.sh
@@ -0,0 +1,72 @@
+#!/bin/sh
+
+test_description='Test reflog interaction with detached HEAD'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
+. ./test-lib.sh
+
+reset_state () {
+	rm -rf .git && "$TAR" xf .git-saved.tar
+}
+
+test_expect_success setup '
+	test_tick &&
+	git commit --allow-empty -m initial &&
+	git branch side &&
+	test_tick &&
+	git commit --allow-empty -m second &&
+	"$TAR" cf .git-saved.tar .git
+'
+
+test_expect_success baseline '
+	reset_state &&
+	git rev-parse main main^ >expect &&
+	git log -g --format=%H >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'switch to branch' '
+	reset_state &&
+	git rev-parse side main main^ >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 main side main main^ >expect &&
+	git checkout side &&
+	git checkout main^0 &&
+	git log -g --format=%H >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'detach to self' '
+	reset_state &&
+	git rev-parse main main main^ >expect &&
+	git checkout main^0 &&
+	git log -g --format=%H >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'attach to self' '
+	reset_state &&
+	git rev-parse main main main main^ >expect &&
+	git checkout main^0 &&
+	git checkout main &&
+	git log -g --format=%H >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'attach to other' '
+	reset_state &&
+	git rev-parse side main main main^ >expect &&
+	git checkout main^0 &&
+	git checkout side &&
+	git log -g --format=%H >actual &&
+	test_cmp expect actual
+'
+
+test_done