From 92e2a91a77d89e4c12c1dea932197a682b94c80d Mon Sep 17 00:00:00 2001
From: Jiamu Sun <39@barroit.sh>
Date: Tue, 10 Mar 2026 20:41:07 +0900
Subject: [PATCH] help: add tests for subcommand autocorrection

These tests cover default behavior (help.autocorrect is unset), no
correction, immediate correction, delayed correction, and rejection
when the typo is too dissimilar.

Signed-off-by: Jiamu Sun <39@barroit.sh>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t9004-autocorrect-subcommand.sh | 51 +++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100755 t/t9004-autocorrect-subcommand.sh

diff --git a/t/t9004-autocorrect-subcommand.sh b/t/t9004-autocorrect-subcommand.sh
new file mode 100755
index 0000000000..d10031659b
--- /dev/null
+++ b/t/t9004-autocorrect-subcommand.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+
+test_description='subcommand auto-correction test
+
+Test autocorrection for subcommands with different
+help.autocorrect mode.'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' "
+	echo '^error: unknown subcommand: ' >grep_unknown
+"
+
+test_expect_success 'default is not to autocorrect' '
+	test_must_fail git worktree lsit 2>actual &&
+	head -n1 actual >first && test_grep -f grep_unknown first
+'
+
+for mode in false no off 0 show never
+do
+	test_expect_success "'$mode' disables autocorrection" "
+		test_config help.autocorrect $mode &&
+
+		test_must_fail git worktree lsit 2>actual &&
+		head -n1 actual >first && test_grep -f grep_unknown first
+	"
+done
+
+for mode in -39 immediate 1
+do
+	test_expect_success "autocorrect immediately with '$mode'" - <<-EOT
+		test_config help.autocorrect $mode &&
+
+		git worktree lsit 2>actual &&
+		test_grep "you meant 'list'\.$" actual
+	EOT
+done
+
+test_expect_success 'delay path is executed' - <<-\EOT
+	test_config help.autocorrect 2 &&
+
+	git worktree lsit 2>actual &&
+	test_grep '^Continuing in 0.2 seconds, ' actual
+EOT
+
+test_expect_success 'deny if too dissimilar' - <<-\EOT
+	test_must_fail git remote rensnr 2>actual &&
+	head -n1 actual >first && test_grep -f grep_unknown first
+EOT
+
+test_done