1 files changed, 75 insertions, 0 deletions
diff --git a/third_party/git/t/t2013-checkout-submodule.sh b/third_party/git/t/t2013-checkout-submodule.sh
new file mode 100755
index 0000000000..8f86b5f4b2
--- /dev/null
+++ b/third_party/git/t/t2013-checkout-submodule.sh
@@ -0,0 +1,75 @@
+#!/bin/sh
+
+test_description='checkout can handle submodules'
+
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-submodule-update.sh
+
+test_expect_success 'setup' '
+	mkdir submodule &&
+	(cd submodule &&
+	 git init &&
+	 test_commit first) &&
+	git add submodule &&
+	test_tick &&
+	git commit -m superproject &&
+	(cd submodule &&
+	 test_commit second) &&
+	git add submodule &&
+	test_tick &&
+	git commit -m updated.superproject
+'
+
+test_expect_success '"reset <submodule>" updates the index' '
+	git update-index --refresh &&
+	git diff-files --quiet &&
+	git diff-index --quiet --cached HEAD &&
+	git reset HEAD^ submodule &&
+	test_must_fail git diff-files --quiet &&
+	git reset submodule &&
+	git diff-files --quiet
+'
+
+test_expect_success '"checkout <submodule>" updates the index only' '
+	git update-index --refresh &&
+	git diff-files --quiet &&
+	git diff-index --quiet --cached HEAD &&
+	git checkout HEAD^ submodule &&
+	test_must_fail git diff-files --quiet &&
+	git checkout HEAD submodule &&
+	git diff-files --quiet
+'
+
+test_expect_success '"checkout <submodule>" honors diff.ignoreSubmodules' '
+	git config diff.ignoreSubmodules dirty &&
+	echo x> submodule/untracked &&
+	git checkout HEAD >actual 2>&1 &&
+	test_must_be_empty actual
+'
+
+test_expect_success '"checkout <submodule>" honors submodule.*.ignore from .gitmodules' '
+	git config diff.ignoreSubmodules none &&
+	git config -f .gitmodules submodule.submodule.path submodule &&
+	git config -f .gitmodules submodule.submodule.ignore untracked &&
+	git checkout HEAD >actual 2>&1 &&
+	test_must_be_empty actual
+'
+
+test_expect_success '"checkout <submodule>" honors submodule.*.ignore from .git/config' '
+	git config -f .gitmodules submodule.submodule.ignore none &&
+	git config submodule.submodule.path submodule &&
+	git config submodule.submodule.ignore all &&
+	git checkout HEAD >actual 2>&1 &&
+	test_must_be_empty actual
+'
+
+KNOWN_FAILURE_DIRECTORY_SUBMODULE_CONFLICTS=1
+test_submodule_switch_recursing_with_args "checkout"
+
+test_submodule_forced_switch_recursing_with_args "checkout -f"
+
+test_submodule_switch "git checkout"
+
+test_submodule_forced_switch "git checkout -f"
+
+test_done