[OpenAPI] Add "type" property with value "object" response schema to fix Infragistics AppBuilder tooling

src/Core/Services/OpenAPI/OpenApiDocumentor.cs

@@ -937,6 +937,7 @@ private static OpenApiMediaType CreateResponseContainer(string responseObjectSch
             {
                 Schema = new()
                 {
+                    Type = SCHEMA_OBJECT_TYPE,
                     Properties = responseBodyProperties
                 }
             };

src/Service.Tests/OpenApiDocumentor/DocumentVerbosityTests.cs

@@ -0,0 +1,87 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Azure.DataApiBuilder.Config.ObjectModel;
+using Microsoft.OpenApi.Models;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace Azure.DataApiBuilder.Service.Tests.OpenApiIntegration
+{
+    /// <summary>
+    /// Integration tests validating that expected properties are present in the OpenApiDocument object.
+    /// </summary>
+    [TestCategory(TestCategory.MSSQL)]
+    [TestClass]
+    public class DocumentVerbosityTests
+    {
+        private const string CUSTOM_CONFIG = "doc-verbosity.MsSql.json";
+        private const string MSSQL_ENVIRONMENT = TestCategory.MSSQL;
+        private const string MISSING_TYPE_PROPERTY_ERROR = "Response object schema does not include a 'type' property.";
+        private const string UNEXPECTED_CONTENTS_ERROR = "Unexpected number of response objects to validate.";
+
+        /// <summary>
+        /// Validates that for the Book entity, 7 response object schemas generated by OpenApiDocumentor
+        /// contain a 'type' property with value 'object'.
+        /// 
+        /// Two paths:
+        ///     - "/Books/id/{id}"
+        ///         - 4 operations GET PUT PATCH DELETE
+        ///             - Validate responses that return result contents:
+        ///               GET (200), PUT (200, 201), PATCH (200, 201)
+        ///     - "/Books"
+        ///         - 2 operations GET(all) POST
+        ///             - Validate responses that return result contents:
+        ///               GET (200), POST (201)
+        /// </summary>
+        [TestMethod]
+        public async Task ResponseObjectSchemaIncludesTypeProperty()
+        {
+            // Arrange
+            Entity entity = new(
+                Source: new(Object: "books", EntitySourceType.Table, null, null),
+                GraphQL: new(Singular: null, Plural: null, Enabled: false),
+                Rest: new(Methods: EntityRestOptions.DEFAULT_SUPPORTED_VERBS),
+                Permissions: OpenApiTestBootstrap.CreateBasicPermissions(),
+                Mappings: null,
+                Relationships: null);
+
+            Dictionary<string, Entity> entities = new()
+            {
+                { "Book", entity }
+            };
+
+            RuntimeEntities runtimeEntities = new(entities);
+
+            // Act - Create OpenApi document
+            OpenApiDocument openApiDocument = await OpenApiTestBootstrap.GenerateOpenApiDocumentAsync(
+                runtimeEntities: runtimeEntities,
+                configFileName: CUSTOM_CONFIG,
+                databaseEnvironment: MSSQL_ENVIRONMENT);
+
+            // Assert - Validate responses that return result contents: 200, 201
+            List<OpenApiResponse> responses = openApiDocument.Paths.Values
+                .SelectMany(pathObject => pathObject.Operations.Values)
+                .SelectMany(operation => operation.Responses)
+                // Responses Dictionary: Key: HttpStatusCode, Value: OpenApiResponse
+                .Where(pair => pair.Key == "200" || pair.Key == "201")
+                .Select(pair => pair.Value)
+                .ToList();
+
+            // Validate that 7 response object schemas contain a 'type' property with value 'object'
+            // Test summary describes all 7 expected responses.
+            Assert.IsTrue(
+                condition: responses.Count == 7,
+                message: UNEXPECTED_CONTENTS_ERROR);
+
+            foreach (OpenApiResponse response in responses)
+            {
+                Assert.IsTrue(
+                    condition: response.Content["application/json"].Schema.Type == "object",
+                    message: MISSING_TYPE_PROPERTY_ERROR);
+            }
+        }
+    }
+}