时间格式验证增加测试

IRaCIS.Core.API/_ServiceExtensions/NewtonsoftJson/JSONTimeZoneConverter.cs

@@ -71,31 +71,24 @@ namespace IRaCIS.Core.API
 
             DateTime dateTime;
 
-            if (reader.ValueType == typeof(DateTime) || reader.ValueType == typeof(DateTime?))
-            {
-                DateTime? nullableDateTime = reader.Value as DateTime?;
+            // 2. 检查目标类型是否可空
+            bool isNullable = objectType == typeof(DateTime?);
+
+            var canConvert = DateTime.TryParse(reader.Value?.ToString(), out dateTime);
 
 
-                if (nullableDateTime != null && nullableDateTime.HasValue)
+            if (isNullable == false && canConvert == false)
             {
-                    dateTime = nullableDateTime.Value;
+
+                throw new JsonSerializationException($"Could not convert string to DateTime: {reader.Value} Path {reader.Path}"); 
             }
             else
+            {
+                if (canConvert == false)
                 {
                     return null;
                 }
             }
-            else
-            {
-                if (DateTime.TryParse((string)reader.Value, out dateTime) == false)
-                {
-
-                    //throw new JsonSerializationException($"Could not convert string to DateTime: {reader.Value} Path {reader.Path}");
-                    return null;
-                }
-            }
-
-
 
             // 将客户端时间转换为服务器时区的时间
             var serverZoneTime = TimeZoneInfo.ConvertTime(dateTime, _clientTimeZone, TimeZoneInfo.Local);