t1512: skip test if not using SHA-1

bk2204 · gitster · commit d7a2fc82491b · 2018-05-14T11:02:01.000+09:00
This test relies on objects with colliding short names which are
necessarily dependent on the hash used.  Skip the test if we're not
using SHA-1.

Signed-off-by: brian m. carlson &lt;sandals@crustytoothpaste.net&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/t/t1512-rev-parse-disambiguation.sh b/t/t1512-rev-parse-disambiguation.sh
@@ -22,6 +22,12 @@ one tagged as v1.0.0.  They all have one regular file each.
 
 . ./test-lib.sh
 
+if ! test_have_prereq SHA1
+then
+	skip_all='not using SHA-1 for objects'
+	test_done
+fi
+
 test_expect_success 'blob and tree' '
 	test_tick &&
 	(
