test_debug 'gitk --all'
+test_expect_success 'merge c0 with c1 with --ff-only' '
+ git reset --hard c0 &&
+ git merge --ff-only c1 &&
+ git merge --ff-only HEAD c0 c1 &&
+ verify_merge file result.1 &&
+ verify_head "$c1"
+'
+
+test_debug 'gitk --all'
+
test_expect_success 'merge c1 with c2' '
git reset --hard c1 &&
test_tick &&
test_debug 'gitk --all'
+test_expect_success 'failing merges with --ff-only' '
+ git reset --hard c1 &&
+ test_tick &&
+ test_must_fail git merge --ff-only c2 &&
+ test_must_fail git merge --ff-only c3 &&
+ test_must_fail git merge --ff-only c2 c3
+'
+
test_expect_success 'merge c0 with c1 (no-commit)' '
git reset --hard c0 &&
git merge --no-commit c1 &&
test_debug 'gitk --all'
+test_expect_success 'merge c0 with c1 (squash, ff-only)' '
+ git reset --hard c0 &&
+ git merge --squash --ff-only c1 &&
+ verify_merge file result.1 &&
+ verify_head $c0 &&
+ verify_no_mergehead &&
+ verify_diff squash.1 .git/SQUASH_MSG "[OOPS] bad squash message"
+'
+
+test_debug 'gitk --all'
+
test_expect_success 'merge c1 with c2 (squash)' '
git reset --hard c1 &&
git merge --squash c2 &&
test_debug 'gitk --all'
+test_expect_success 'unsuccesful merge of c1 with c2 (squash, ff-only)' '
+ git reset --hard c1 &&
+ test_must_fail git merge --squash --ff-only c2
+'
+
+test_debug 'gitk --all'
+
test_expect_success 'merge c1 with c2 and c3 (squash)' '
git reset --hard c1 &&
git merge --squash c2 c3 &&
test_must_fail git merge --no-ff --squash c1
'
+test_expect_success 'combining --ff-only and --no-ff is refused' '
+ test_must_fail git merge --ff-only --no-ff c1 &&
+ test_must_fail git merge --no-ff --ff-only c1
+'
+
test_expect_success 'merge c0 with c1 (ff overrides no-ff)' '
git reset --hard c0 &&
git config branch.master.mergeoptions "--no-ff" &&