receive-pack: avoid duplicates between our refs and alternates

[thirdparty/git.git] / t / t5400-send-pack.sh

diff --git a/t/t5400-send-pack.sh b/t/t5400-send-pack.sh
index 305ca7a9308685c7d040ac254fd34cebbbc86cc8..3331e0f53443f9a8566d01ac08dd0cbc5aa2d33b 100755 (executable)
--- a/t/t5400-send-pack.sh
+++ b/t/t5400-send-pack.sh
@@ -255,4 +255,42 @@ test_expect_success 'deny pushing to delete current branch' '
        )
 '
 
+extract_ref_advertisement () {
+       perl -lne '
+               # \\ is there to skip capabilities after \0
+               /push< ([^\\]+)/ or next;
+               exit 0 if $1 eq "0000";
+               print $1;
+       '
+}
+
+test_expect_success 'receive-pack de-dupes .have lines' '
+       git init shared &&
+       git -C shared commit --allow-empty -m both &&
+       git clone -s shared fork &&
+       (
+               cd shared &&
+               git checkout -b only-shared &&
+               git commit --allow-empty -m only-shared &&
+               git update-ref refs/heads/foo HEAD
+       ) &&
+
+       # Notable things in this expectation:
+       #  - local refs are not de-duped
+       #  - .have does not duplicate locals
+       #  - .have does not duplicate itself
+       local=$(git -C fork rev-parse HEAD) &&
+       shared=$(git -C shared rev-parse only-shared) &&
+       cat >expect <<-EOF &&
+       $local refs/heads/master
+       $local refs/remotes/origin/HEAD
+       $local refs/remotes/origin/master
+       $shared .have
+       EOF
+
+       GIT_TRACE_PACKET=$(pwd)/trace git push fork HEAD:foo &&
+       extract_ref_advertisement <trace >refs &&
+       test_cmp expect refs
+'
+
 test_done