git diff-files --quiet -- sub .gitmodules
'
+test_expect_success 'checking out a commit before submodule moved needs manual updates' '
+ git mv sub sub2 &&
+ git commit -m "moved sub to sub2" &&
+ git checkout -q HEAD^ 2>actual &&
+ echo "warning: unable to rmdir sub2: Directory not empty" >expected &&
+ test_i18ncmp expected actual &&
+ git status -s sub2 >actual &&
+ echo "?? sub2/" >expected &&
+ test_cmp expected actual &&
+ ! test -f sub/.git &&
+ test -f sub2/.git &&
+ git submodule update &&
+ test -f sub/.git &&
+ rm -rf sub2 &&
+ git diff-index --exit-code HEAD &&
+ git update-index --refresh &&
+ git diff-files --quiet -- sub .gitmodules &&
+ git status -s sub2 >actual &&
+ ! test -s actual
+'
+
+ test_expect_success 'mv -k does not accidentally destroy submodules' '
+ git checkout submodule &&
+ mkdir dummy dest &&
+ git mv -k dummy sub dest &&
+ git status --porcelain >actual &&
+ grep "^R sub -> dest/sub" actual &&
+ git reset --hard &&
+ git checkout .
+ '
+
test_done