Updated RestIntegrationTest to output missing properties in a list so the running test can output them as warning instead of error

CryptoExchange.Net/Testing/Comparers/SystemTextJsonComparer.cs

@@ -8,6 +8,7 @@ using System.Text.Json;
 using System.Text.Json.Serialization;
 using CryptoExchange.Net.Converters;
 using CryptoExchange.Net.Converters.SystemTextJson;
+using CryptoExchange.Net.Testing.Exceptions;
 
 #pragma warning disable IL2026
 #pragma warning disable IL2070
@@ -191,7 +192,7 @@ namespace CryptoExchange.Net.Testing.Comparers
 
             if (property is null)
                 // Property not found
-                throw new Exception($"{method}: Missing property `{prop.Name}` on `{obj.GetType().Name}`");
+                throw new MissingPropertyException(method, obj.GetType().Name, prop.Name, prop.Value.ValueKind == JsonValueKind.Null ? "[null]" : prop.Value.ToString());
 
             var getMethod = property.GetGetMethod();
             if (getMethod is null)

CryptoExchange.Net/Testing/Exceptions/MissingPropertyException.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.Serialization;
+using System.Text;
+
+namespace CryptoExchange.Net.Testing.Exceptions
+{
+    internal class MissingPropertyException : Exception
+    {
+        public MissingPropertyException(string method, string objName, string propName, string value) 
+            : base($"{method}: Missing property `{propName}` on `{objName}`, value: {value.Substring(0, Math.Min(50, value.Length))}")
+        {
+        }
+    }
+}

CryptoExchange.Net/Testing/RestIntegrationTest.cs

@@ -1,6 +1,7 @@
 using CryptoExchange.Net.Interfaces;
 using CryptoExchange.Net.Objects;
 using CryptoExchange.Net.Testing.Comparers;
+using CryptoExchange.Net.Testing.Exceptions;
 using Microsoft.Extensions.Logging;
 using System;
 using System.Collections.Generic;
@@ -55,6 +56,26 @@ namespace CryptoExchange.Net.Testing
             return true;
         }
 
+        /// <summary>
+        /// Execute a REST endpoint call and check for any errors or warnings. Also checks for missing fields in the response mapping
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="warningExceptionsHolder">List for outputting warnings</param>
+        /// <param name="expression">The call expression</param>
+        /// <param name="authRequest">Whether this is an authenticated request</param>
+        /// <param name="compareNestedProperty">Nested property to use for comparing when checking for missing fields</param>
+        /// <param name="ignoreProperties">Properties to ignore when checking for missing fields</param>
+        /// <param name="useSingleArrayItem">Whether to use the single array item as compare when checking for missing fields</param>
+        /// <returns></returns>
+        public Task RunAndCheckResult<T>(
+            List<Exception> warningExceptionsHolder,
+            Expression<Func<TClient, Task<HttpResult<T>>>> expression,
+            bool authRequest,
+            string? compareNestedProperty = null,
+            List<string>? ignoreProperties = null,
+            bool? useSingleArrayItem = null)
+            => RunAndCheckResult(expression, authRequest, true, compareNestedProperty, ignoreProperties, useSingleArrayItem, warningExceptionsHolder);
+
         /// <summary>
         /// Execute a REST endpoint call and check for any errors or warnings.
         /// </summary>
@@ -65,13 +86,15 @@ namespace CryptoExchange.Net.Testing
         /// <param name="compareNestedProperty">Nested property to use for comparing when checking for missing fields</param>
         /// <param name="ignoreProperties">Properties to ignore when checking for missing fields</param>
         /// <param name="useSingleArrayItem">Whether to use the single array item as compare when checking for missing fields</param>
+        /// <param name="warningExceptionsHolder">List for outputting warnings</param>
         public async Task RunAndCheckResult<T>(
             Expression<Func<TClient, Task<HttpResult<T>>>> expression,
             bool authRequest,
             bool checkMissingFields = false,
             string? compareNestedProperty = null,
             List<string>? ignoreProperties = null,
-            bool? useSingleArrayItem = null)
+            bool? useSingleArrayItem = null,
+            List<Exception>? warningExceptionsHolder = null)
         {
             if (!ShouldRun())
                 return;
@@ -112,9 +135,14 @@ namespace CryptoExchange.Net.Testing
                 if (originalData == null)
                     throw new Exception($"Original data needs to be enabled in the client options to check for missing fields");
 
-                try {
+                try 
+                {
                     SystemTextJsonComparer.CompareData(expressionBody.Method.Name, data, originalData, compareNestedProperty, ignoreProperties, useSingleArrayItem ?? false);
                 }
+                catch (MissingPropertyException mpe)
+                {
+                    warningExceptionsHolder?.Add(mpe);
+                }
                 catch (Exception ex)
                 {
                     throw new Exception($"Compare failed: {ex.Message}; original data: {originalData}", ex);