t5510: add a bit more tests for fetch

diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
index e8ce7cdb833e3c0f45ffb52d85d7572839e3e34a..4fe3a41f07f2f05865b219ff00afaa5786c679d5 100755 (executable)
--- a/t/t7400-submodule-basic.sh
+++ b/t/t7400-submodule-basic.sh
@@ -152,6 +152,10 @@ test_expect_success 'the --cached sha1 should be rev1' '
        git-submodule --cached status | grep "^+$rev1"
 '
 
+test_expect_success 'git diff should report the SHA1 of the new submodule commit' '
+       git-diff | grep "^+Subproject commit $rev2"
+'
+
 test_expect_success 'update should checkout rev1' '
        git-submodule update &&
        head=$(cd lib && git rev-parse HEAD) &&
@@ -175,4 +179,21 @@ test_expect_success 'checkout superproject with subproject already present' '
        git-checkout master
 '
 
+test_expect_success 'apply submodule diff' '
+       git branch second &&
+       (
+               cd lib &&
+               echo s >s &&
+               git add s &&
+               git commit -m "change subproject"
+       ) &&
+       git update-index --add lib &&
+       git-commit -m "change lib" &&
+       git-format-patch -1 --stdout >P.diff &&
+       git checkout second &&
+       git apply --index P.diff &&
+       D=$(git diff --cached master) &&
+       test -z "$D"
+'
+
 test_done