test_expect_success 'custom merge does not lock index' '
git reset --hard anchor &&
- write_script sleep-one-second.sh <<-\EOF &&
- sleep 1 &
+ write_script sleep-an-hour.sh <<-\EOF &&
+ sleep 3600 &
+ echo $! >sleep.pid
EOF
test_write_lines >.gitattributes \
- "* merge=ours" "text merge=sleep-one-second" &&
+ "* merge=ours" "text merge=sleep-an-hour" &&
test_config merge.ours.driver true &&
- test_config merge.sleep-one-second.driver ./sleep-one-second.sh &&
+ test_config merge.sleep-an-hour.driver ./sleep-an-hour.sh &&
+
+ # We are testing that the custom merge driver does not block
+ # index.lock on Windows due to an inherited file handle.
+ # To ensure that the backgrounded process ran sufficiently
+ # long (and has been started in the first place), we do not
+ # ignore the result of the kill command.
+ # By packaging the command in test_when_finished, we get both
+ # the correctness check and the clean-up.
+ test_when_finished "kill \$(cat sleep.pid)" &&
git merge master
'