[PATCH 02/28] t/test-lib: introduce ZERO_OID

From: brian m. carlson <sandals@crustytoothpaste.net>
Date: May 6, 2018, 23:17 UTC
Message-ID: <20180506231752.975110-3-sandals@crustytoothpaste.net>
In-Reply-To: <20180506231752.975110-1-sandals@crustytoothpaste.net>

Currently we have a variable, $_z40, which contains the all-zero object ID. However, with NewHash, we'll have an all-zero object ID which is longer than 40 hex characters. In such a case, $_z40 will be a confusing name. Create a $ZERO_OID variable which will always reflect the all-zeros object ID, regardless of the length of the current hash.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 t/test-lib.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/t/test-lib.sh b/t/test-lib.sh
index fce728d2ea..58c2ea52c6 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -184,6 +184,7 @@ _x40="$_x35$_x05"
 # Zero SHA-1
 _z40=0000000000000000000000000000000000000000
 
+ZERO_OID=$_z40
 EMPTY_TREE=4b825dc642cb6eb9a060e54bf8d69288fbee4904
 EMPTY_BLOB=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
 
@@ -195,7 +196,7 @@ LF='
 # when case-folding filenames
 u200c=$(printf '\342\200\214')
 
-export _x05 _x35 _x40 _z40 LF u200c EMPTY_TREE EMPTY_BLOB
+export _x05 _x35 _x40 _z40 LF u200c EMPTY_TREE EMPTY_BLOB ZERO_OID
 
 # Each test should start with something like this, after copyright notices:
 #