less storage

@@ -46,9 +46,9 @@ exports.lte = (num1, num2, options) => {
 exports.showStorage = (leftNumber) => {
     leftNumber = +leftNumber;
 
-    if (leftNumber <= 3 && leftNumber > 0) {
+    if (leftNumber <= 3 && leftNumber >= 0) {
         return `仅剩${leftNumber}件`;
-    } else if (leftNumber <= 0) {
+    } else if (leftNumber < 0) {
         return '库存不足';
     }
 };

@@ -6,9 +6,9 @@
 module.exports = function(leftNumber) {
     leftNumber = +leftNumber;
 
-    if (leftNumber <= 3 && leftNumber > 0) {
+    if (leftNumber <= 3 && leftNumber >= 0) {
         return '仅剩' + leftNumber + '件';
-    } else if (leftNumber <= 0) {
+    } else if (leftNumber < 0) {
         return '库存不足';
     }
 };