- switches to a referenced schema for count operations

Signed-off-by: Vincent Biret <vibiret@microsoft.com>

src/Microsoft.OpenApi.OData.Reader/Common/Constants.cs

@@ -79,5 +79,9 @@ namespace Microsoft.OpenApi.OData.Common
         /// extension for discriminator value support
         /// </summary>
         public static string xMsDiscriminatorValue = "x-ms-discriminator-value";
+        /// <summary>
+        /// Name used for the OpenAPI referenced schema for OData Count operations responses.
+        /// </summary>
+        public static string DollarCountSchemaName = "ODataCountResponse";
     }
 }

src/Microsoft.OpenApi.OData.Reader/Generator/OpenApiSchemaGenerator.cs

@@ -67,6 +67,11 @@ namespace Microsoft.OpenApi.OData.Generator
                 schemas[schema.Key] = schema.Value;
             }
 
+            schemas[Constants.DollarCountSchemaName] = new OpenApiSchema {
+                Type = "integer",
+                Format = "int32"
+            };
+
             return schemas;
         }
 

src/Microsoft.OpenApi.OData.Reader/Operation/DollarCountGetOperationHandler.cs

@@ -54,10 +54,12 @@ namespace Microsoft.OpenApi.OData.Operation
         /// <inheritdoc/>
         protected override void SetResponses(OpenApiOperation operation)
         {
-            OpenApiSchema schema = new OpenApiSchema
-            {
-                Type = "integer",
-                Format = "int32"
+            OpenApiSchema schema = new()
+			{
+                Reference = new() {
+                    Type = ReferenceType.Schema,
+                    Id = Constants.DollarCountSchemaName
+                }
             };
 
             operation.Responses = new OpenApiResponses