Re: [PATCH v4 1/1] contrib/subtree: Add a test for subtree rebase that loses commits

> On Sun, Jan 17, 2016 at 6:43 PM, David Greene <greened@obbligato.org> wrote:
>> This test merges an external tree in as a subtree, makes some commits
>> on top of it and splits it back out.  In the process the added commits
>> are lost or the rebase aborts with an internal error.  The tests are
>> marked to expect failure so that we don't forget to fix it.
>>
>> Signed-off-by: David A. Greene <greened@obbligato.org>
>> ---
>> diff --git a/t/t3427-rebase-subtree.sh b/t/t3427-rebase-subtree.sh
>> @@ -0,0 +1,70 @@
>> +# FAILURE: Does not preserve master4 and master5.
>> +test_expect_failure 'Rebase -Xsubtree --preserve-merges --onto' '
>> +       reset_rebase &&
>> +       git checkout -b rebase-preserve-merges master &&
>> +       git filter-branch --prune-empty -f --subdirectory-filter files_subtree &&
>> +       git commit -m "Empty commit" --allow-empty &&
>> +       git rebase -Xsubtree=files_subtree --preserve-merges --onto files-master master &&
>> +       verbose "$(last_commit_message)" "files_subtree/master5"
>
> Hmm, does this test succeed? If it does, it's only by accident.
> verbose() is just a helper for printing the the expression being
> tested upon failure, but you still need to supply a proper expression
> for testing. It is intended to be used like this:
>
>     verbose test "$(last_commit_message)" = files_subtree/master5
>
> Same comment applies to the remaining tests.