! test -s actual.err
'
+test_expect_success 'submodule update should fail due to local changes' '
+ (cd super/submodule &&
+ git reset --hard HEAD~1 &&
+ echo "local change" > file
+ ) &&
+ (cd super &&
+ (cd submodule &&
+ compare_head
+ ) &&
+ test_must_fail git submodule update submodule
+ )
+'
+test_expect_success 'submodule update should throw away changes with --force ' '
+ (cd super &&
+ (cd submodule &&
+ compare_head
+ ) &&
+ git submodule update --force submodule &&
+ cd submodule &&
+ ! compare_head
+ )
+'
+
test_expect_success 'submodule update --rebase staying on master' '
(cd super/submodule &&
git checkout master