check output hash for correctness

License: MIT
Signed-off-by: Jeromy <why@ipfs.io>

test/sharness/t0051-object.sh

@@ -185,9 +185,15 @@ test_object_cmd() {
 		N1=$(ipfs object patch $EMPTY_DIR add-link baz $EMPTY_DIR) &&
 		N2=$(ipfs object patch $EMPTY_DIR add-link bar $N1) &&
 		N3=$(ipfs object patch $EMPTY_DIR add-link foo /ipfs/$N2/bar) &&
-		ipfs object stat /ipfs/$N3 &&
-		ipfs object stat $N3/foo &&
-		ipfs object stat /ipfs/$N3/foo/baz
+		ipfs object stat /ipfs/$N3 > /dev/null &&
+		ipfs object stat $N3/foo > /dev/null &&
+		ipfs object stat /ipfs/$N3/foo/baz > /dev/null
+	'
+
+	test_expect_success "object patch creation looks right" '
+		echo "QmPc73aWK9dgFBXe86P4PvQizHo9e5Qt7n7DAMXWuigFuG" > hash_exp &&
+		echo $N3 > hash_actual &&
+		test_cmp hash_exp hash_actual
 	'
 
 	test_expect_success "multilayer ipfs patch works" '