fix entry encode not work with empty key string and add test cases

CHANGELOG.md

@@ -1,4 +1,7 @@
 ## CHANGE LOG
+## NEXT VERSION
+- 对象存储，修复无法对 key 为空字符串的对象进行操作
+
 ## 7.8.0
 - 移除不推荐域名，并增加 亚太-首尔 和 华东-浙江2 固定区域
 - RTC，优化请求失败的错误信息

qiniu/util.js

@@ -42,7 +42,11 @@ exports.formatDateUTC = function (date, layout) {
 
 // Encoded Entry
 exports.encodedEntry = function (bucket, key) {
-    return exports.urlsafeBase64Encode(bucket + (key ? ':' + key : ''));
+    let strToEncode = bucket;
+    if (key !== undefined) {
+        strToEncode += ':' + key;
+    }
+    return exports.urlsafeBase64Encode(strToEncode);
 };
 
 // Get accessKey from uptoken

test/util.test.js

@@ -328,5 +328,47 @@ describe('test util functions', function () {
                 );
             }
         });
+
+        it('test encodedEntry', function () {
+            const caseList = [
+                {
+                    msg: 'normal',
+                    bucket: 'qiniuphotos',
+                    key: 'gogopher.jpg',
+                    expect: 'cWluaXVwaG90b3M6Z29nb3BoZXIuanBn'
+                },
+                {
+                    msg: 'key empty',
+                    bucket: 'qiniuphotos',
+                    key: '',
+                    expect: 'cWluaXVwaG90b3M6'
+                },
+                {
+                    msg: 'key undefined',
+                    bucket: 'qiniuphotos',
+                    key: undefined,
+                    expect: 'cWluaXVwaG90b3M='
+                },
+                {
+                    msg: 'key need replace plus symbol',
+                    bucket: 'qiniuphotos',
+                    key: '012ts>a',
+                    expect: 'cWluaXVwaG90b3M6MDEydHM-YQ=='
+                },
+                {
+                    msg: 'key need replace slash symbol',
+                    bucket: 'qiniuphotos',
+                    key: '012ts?a',
+                    expect: 'cWluaXVwaG90b3M6MDEydHM_YQ=='
+                }
+            ];
+
+            for (let i = 0; i < caseList.length; i++) {
+                const actual = qiniu.util.encodedEntry(caseList[i].bucket, caseList[i].key);
+                const expect = caseList[i].expect;
+                const msg = caseList[i].msg;
+                should.equal(actual, expect, msg);
+            }
+        });
     });
 });