test_expect_success "virtual trees were processed" "git diff expect out"
+git reset --hard
+test_expect_success 'refuse to merge binary files' '
+ printf "\0" > binary-file &&
+ git add binary-file &&
+ git commit -m binary &&
+ git checkout G &&
+ printf "\0\0" > binary-file &&
+ git add binary-file &&
+ git commit -m binary2 &&
+ ! git merge F > merge.out 2> merge.err &&
+ grep "Cannot merge binary files: HEAD:binary-file vs. F:binary-file" \
+ merge.err
+'
+
test_done