filter-branch: Extend test to show rewriting bug

This extends the --subdirectory-filter test in t7003 to demonstrate a
rewriting bug: when rewriting two refs A and B such that B is an
ancestor of A, it fails to rewrite B.

The underlying issue is that the rev-list invocation at
git-filter-branch.sh:332 more or less boils down to

  git rev-list B --boundary ^A

which outputs nothing because B is an ancestor of A.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t7003-filter-branch.sh b/t/t7003-filter-branch.sh
index a0ab096c8fdee153a89a1428f85c9bf107badada..4382baa27dae7c9ba9d51551dbfbb6efb74e91bd 100755 (executable)
--- a/t/t7003-filter-branch.sh
+++ b/t/t7003-filter-branch.sh
@@ -96,13 +96,17 @@ test_expect_success 'filter subdirectory only' '
        test_tick &&
        git commit -m "again not subdir" &&
        git branch sub &&
-       git-filter-branch -f --subdirectory-filter subdir refs/heads/sub
+       git branch sub-earlier HEAD~2 &&
+       git-filter-branch -f --subdirectory-filter subdir \
+               refs/heads/sub refs/heads/sub-earlier
 '
 
-test_expect_success 'subdirectory filter result looks okay' '
+test_expect_failure 'subdirectory filter result looks okay' '
        test 2 = $(git rev-list sub | wc -l) &&
        git show sub:new &&
-       test_must_fail git show sub:subdir
+       test_must_fail git show sub:subdir &&
+       git show sub-earlier:new &&
+       test_must_fail git show sub-earlier:subdir
 '
 
 test_expect_success 'more setup' '