test(downloadFile): 优化测试逻辑

pages/API/download-file/download-file.uvue

@@ -123,7 +123,6 @@
           firstIpv4: false,
           success: () => {
             this.jest_cookie_download(true)
-            this.jest_callback_triggred = true
           },
           fail: () => {
             this.jest_result = false;
@@ -142,7 +141,6 @@
           firstIpv4: false,
           success: () => {
             this.jest_cookie_download(false)
-            this.jest_callback_triggred = true
           },
           fail: () => {
             this.jest_result = false;
@@ -155,6 +153,7 @@
           url: "https://request.dcloud.net.cn/api/http/header/download",
           success: () => {
             this.jest_result = needCookie ? true : false;
+            this.jest_callback_triggred = true
           },
           fail: () => {
             this.jest_result = needCookie ? false : true;