Migrated missing extension methods

src/HotChocolate/Core/src/Abstractions/Execution/ExecutionResultExtensions.cs

@@ -0,0 +1,44 @@
+using System;
+using static HotChocolate.Properties.AbstractionResources;
+
+namespace HotChocolate.Execution;
+
+/// <summary>
+/// Helper methods for <see cref="IExecutionResult"/>.
+/// </summary>
+public static class ExecutionResultExtensions
+{
+    /// <summary>
+    ///
+    /// </summary>
+    /// <param name="result"></param>
+    /// <returns></returns>
+    /// <exception cref="ArgumentException"></exception>
+    public static IQueryResult ExpectQueryResult(this IExecutionResult result)
+    {
+        if (result is IQueryResult qr)
+        {
+            return qr;
+        }
+
+        throw new ArgumentException(
+            ExecutionResultExtensions_ExpectQueryResult_NotQueryResult);
+    }
+
+    /// <summary>
+    ///
+    /// </summary>
+    /// <param name="result"></param>
+    /// <returns></returns>
+    /// <exception cref="ArgumentException"></exception>
+    public static IResponseStream ExpectResponseStream(this IExecutionResult result)
+    {
+        if (result is IResponseStream rs)
+        {
+            return rs;
+        }
+
+        throw new ArgumentException(
+            ExecutionResultExtensions_ExpectResponseStream_NotResponseStream);
+    }
+}

src/HotChocolate/Core/src/Abstractions/Properties/AbstractionResources.resx

@@ -204,4 +204,10 @@
   <data name="ThrowHelper_SchemaCoordinate_MemberNameCannotBeSetOnADirectiveCoordinate" xml:space="preserve">
     <value>A directive cannot contain a member name.</value>
   </data>
+  <data name="ExecutionResultExtensions_ExpectResponseStream_NotResponseStream" xml:space="preserve">
+    <value>The specified result is expected to be a IResponseStream.</value>
+  </data>
+  <data name="ExecutionResultExtensions_ExpectQueryResult_NotQueryResult" xml:space="preserve">
+    <value>The specified result is expected to be a IQueryResult.</value>
+  </data>
 </root>