t4200: fix rerere test

The test used "diff-files -q" which is not about reporting if there is
a difference at all.  Instead, make sure that the path remains as
conflicting in the index after rerere autoresolves it, as we will be
adding rerere.autoupdate configuration with the next patch.

diff --git a/t/t4200-rerere.sh b/t/t4200-rerere.sh
index 85d7e3edcd04be761167ca87cb39a1597908201e..afb3e3d17619786cce89334e9f8afee0e93d792f 100755 (executable)
--- a/t/t4200-rerere.sh
+++ b/t/t4200-rerere.sh
@@ -193,9 +193,9 @@ test_expect_success 'resolution was recorded properly' '
        echo Bello > file3 &&
        git add file3 &&
        git commit -m version2 &&
-       ! git merge fifth &&
-       git diff-files -q &&
-       test Cello = "$(cat file3)"
+       test_must_fail git merge fifth &&
+       test Cello = "$(cat file3)" &&
+       test 0 != $(git ls-files -u | wc -l)
 '
 
 test_done