fix: ToString() return json

Author: doghappy

src/SocketIOClient.UnitTest/SocketIOResponseTest.cs

@@ -0,0 +1,23 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.Linq;
+using System.Text.Json;
+
+namespace SocketIOClient.UnitTest
+{
+    [TestClass]
+    public class SocketIOResponseTest
+    {
+        [TestMethod]
+        [DataRow("[1]")]
+        [DataRow("[true]")]
+        //[DataRow("[undefined]")]
+        [DataRow("[null]")]
+        [DataRow("[\"hi\",\"arr\",[1,true,\"vvv\"]]")]
+        public void TestToString(string json)
+        {
+            var array = JsonDocument.Parse(json).RootElement.EnumerateArray().ToList();
+            var response = new SocketIOResponse(array, null);
+            Assert.AreEqual(json, response.ToString());
+        }
+    }
+}

src/SocketIOClient/SocketIOResponse.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Text;
 using System.Text.Json;
 using System.Threading.Tasks;
 
@@ -32,7 +33,18 @@ public T GetValue<T>(int index = 0)
 
         public override string ToString()
         {
-            return _array.ToString();
+            var builder = new StringBuilder();
+            builder.Append('[');
+            foreach (var item in _array)
+            {
+                builder.Append(item.GetRawText());
+                if (_array.IndexOf(item) < _array.Count - 1)
+                {
+                    builder.Append(',');
+                }
+            }
+            builder.Append(']');
+            return builder.ToString();
         }
 
         public async Task CallbackAsync(params object[] data)