[PATCH 4/9] t1508 (at-combinations): increase coverage

[Ramkumar Ramachandra <artagnon@gmail.com>]

Add more tests exercising documented functionality.

It is worth nothing that HEAD@{-<n>} is senseless because @{-<n>}
cannot be used with anything other than HEAD anyway.

[fc: contribute a couple of tests]

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
---
 t/t1508-at-combinations.sh | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/t/t1508-at-combinations.sh b/t/t1508-at-combinations.sh
index 55fdd0f..eaa5337 100755
--- a/t/t1508-at-combinations.sh
+++ b/t/t1508-at-combinations.sh
@@ -42,13 +42,21 @@ test_expect_success 'setup' '
 
 check HEAD refs/heads/new-branch
 check "@{1}" commit new-one
+check "HEAD@{1}" commit new-one
+check "@{now}" commit new-two
+check "HEAD@{now}" commit new-two
 check "@{-1}" refs/heads/old-branch
+check "@{-1}@{0}" commit old-two
 check "@{-1}@{1}" commit old-one
 check "@{u}" refs/heads/upstream-branch
+check "HEAD@{u}" refs/heads/upstream-branch
 check "@{u}@{1}" commit upstream-one
 check "@{-1}@{u}" refs/heads/master
 check "@{-1}@{u}@{1}" commit master-one
 nonsense "@{u}@{-1}"
+nonsense "@{0}@{0}"
 nonsense "@{1}@{u}"
+nonsense "HEAD@{-1}"
+nonsense "@{-1}@{-1}"
 
 test_done
-- 
1.8.3.rc0.40.g09a0447