test_cmp expect actual
'
+test_expect_success 'reject Nth parent if N is too high' '
+ test_must_fail git rev-parse HEAD^100000000000000000000000000000000
+'
+
+test_expect_success 'reject Nth ancestor if N is too high' '
+ test_must_fail git rev-parse HEAD~100000000000000000000000000000000
+'
+
test_done