[PATCH v3 4/7] push tests: add more testing for forced tag pushing

[Ævar Arnfjörð Bjarmason]

Improve the tests added in dbfeddb12e ("push: require force for refs
under refs/tags/", 2012-11-29) to assert that the same behavior
applies various other combinations of command-line option and
refspecs.

Supplying either "+" in refspec or "--force" is sufficient to clobber
the reference. With --no-force we still pay attention to "+" in the
refspec, and vice-versa with clobbering kicking in if there's no "+"
in the refspec but "+" is given.

This is consistent with how refspecs work for branches, where either
"+" or "--force" will enable clobbering, with neither taking priority
over the other.

Signed-off-by: Ævar Arnfjörð Bjarmason <ava...@gmail.com>
---
 t/t5516-fetch-push.sh | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/t/t5516-fetch-push.sh b/t/t5516-fetch-push.sh
index fbc44273d9..c7b0d2ba00 100755
--- a/t/t5516-fetch-push.sh
+++ b/t/t5516-fetch-push.sh
@@ -965,7 +965,7 @@ test_expect_success 'push into aliased refs (inconsistent)' 
'
        )
 '
 
-test_expect_success 'push requires --force to update lightweight tag' '
+test_expect_success 'force pushing required to update lightweight tag' '
        mk_test testrepo heads/master &&
        mk_child testrepo child1 &&
        mk_child testrepo child2 &&
@@ -981,7 +981,25 @@ test_expect_success 'push requires --force to update 
lightweight tag' '
                git push --force ../child2 testTag &&
                git tag -f testTag HEAD~ &&
                test_must_fail git push ../child2 testTag &&
-               git push --force ../child2 testTag
+               git push --force ../child2 testTag &&
+
+               # Clobbering without + in refspec needs --force
+               git tag -f testTag &&
+               test_must_fail git push ../child2 "refs/tags/*:refs/tags/*" &&
+               git push --force ../child2 "refs/tags/*:refs/tags/*" &&
+
+               # Clobbering with + in refspec does not need --force
+               git tag -f testTag HEAD~ &&
+               git push ../child2 "+refs/tags/*:refs/tags/*" &&
+
+               # Clobbering with --no-force still obeys + in refspec
+               git tag -f testTag &&
+               git push --no-force ../child2 "+refs/tags/*:refs/tags/*" &&
+
+               # Clobbering with/without --force and "tag <name>" format
+               git tag -f testTag HEAD~ &&
+               test_must_fail git push ../child2 tag testTag &&
+               git push --force ../child2 tag testTag
        )
 '
 
-- 
2.18.0.345.g5c9ce644c3