add--interactive: allow user to choose mode update

diff --git a/t/t7500-commit.sh b/t/t7500-commit.sh
index abbf54ba63693bbb3e839786bf97284c22912333..baed6ce96beb260a32e027dd573313c82202ea7b 100755 (executable)
--- a/t/t7500-commit.sh
+++ b/t/t7500-commit.sh
@@ -93,4 +93,49 @@ test_expect_success 'commit message from file should override template' '
        commit_msg_is "standard input msg"
 '
 
+test_expect_success 'using alternate GIT_INDEX_FILE (1)' '
+
+       cp .git/index saved-index &&
+       (
+               echo some new content >file &&
+               GIT_INDEX_FILE=.git/another_index &&
+               export GIT_INDEX_FILE &&
+               git add file &&
+               git commit -m "commit using another index" &&
+               git diff-index --exit-code HEAD &&
+               git diff-files --exit-code
+       ) &&
+       cmp .git/index saved-index >/dev/null
+
+'
+
+test_expect_success 'using alternate GIT_INDEX_FILE (2)' '
+
+       cp .git/index saved-index &&
+       (
+               rm -f .git/no-such-index &&
+               GIT_INDEX_FILE=.git/no-such-index &&
+               export GIT_INDEX_FILE &&
+               git commit -m "commit using nonexistent index" &&
+               test -z "$(git ls-files)" &&
+               test -z "$(git ls-tree HEAD)"
+
+       ) &&
+       cmp .git/index saved-index >/dev/null
+'
+
+cat > expect << EOF
+zort
+
+Signed-off-by: C O Mitter <committer@example.com>
+EOF
+
+test_expect_success '--signoff' '
+       echo "yet another content *narf*" >> foo &&
+       echo "zort" |
+               GIT_EDITOR=../t7500/add-content git commit -s -F - foo &&
+       git cat-file commit HEAD | sed "1,/^$/d" > output &&
+       diff expect output
+'
+
 test_done