fix: curl array support within multipart/form-data (#3838) (#5999)

ft: utils.createObjWithHashedKeys
ft: curlify.extractKey
test: curlify with array representation

test/mocha/core/curlify.js

@@ -143,6 +143,26 @@ describe("curlify", function() {
         expect(curlified).toEqual("curl -X POST \"http://example.com\" -H  \"content-type: multipart/form-data\" -F \"id=123\" -F \"name=Sahar\"")
     })
 
+    it("should print a curl with formData that extracts array representation with hashIdx", function() {
+        // Note: hashIdx = `_**[]${counter}`
+        // Usage of hashIdx is an internal SwaggerUI method to convert formData array into something curlify can handle 
+        const req = {
+            url: "http://example.com",
+            method: "POST",
+            headers: { "content-type": "multipart/form-data" },
+            body: {
+                id: "123",
+                "fruits[]_**[]1": "apple",
+                "fruits[]_**[]2": "banana",
+                "fruits[]_**[]3": "grape"
+            }
+        }
+
+        let curlified = curl(Im.fromJS(req))
+
+        expect(curlified).toEqual("curl -X POST \"http://example.com\" -H  \"content-type: multipart/form-data\" -F \"id=123\" -F \"fruits[]=apple\" -F \"fruits[]=banana\" -F \"fruits[]=grape\"")
+    })
+
     it("should print a curl with formData and file", function() {
         var file = new win.File()
         file.name = "file.txt"