Code clean up

Author: MaggieKimani1

src/Microsoft.OpenApi.Hidi/OpenApiService.cs

@@ -102,7 +102,7 @@ CancellationToken cancellationToken
                             stream.Position = 0;
                         }
 
-                        document = await ConvertCsdlToOpenApi(stream, cancellationToken, settingsFile);
+                        document = await ConvertCsdlToOpenApi(stream, settingsFile, cancellationToken);
                         stopwatch.Stop();
                         logger.LogTrace("{timestamp}ms: Generated OpenAPI with {paths} paths.", stopwatch.ElapsedMilliseconds, document.Paths.Count);
                     }
@@ -328,7 +328,7 @@ internal static IConfiguration GetConfiguration(string settingsFile)
         /// </summary>
         /// <param name="csdl">The CSDL stream.</param>
         /// <returns>An OpenAPI document.</returns>
-        public static async Task<OpenApiDocument> ConvertCsdlToOpenApi(Stream csdl, CancellationToken token, string settingsFile = null)
+        public static async Task<OpenApiDocument> ConvertCsdlToOpenApi(Stream csdl, string settingsFile = null, CancellationToken token = default)
         {
             using var reader = new StreamReader(csdl);
             var csdlText = await reader.ReadToEndAsync(token);

test/Microsoft.OpenApi.Hidi.Tests/Services/OpenApiServiceTests.cs

@@ -20,7 +20,7 @@ public async Task ReturnConvertedCSDLFile()
             var csdlStream = fileInput.OpenRead();
 
             // Act
-            var openApiDoc = await OpenApiService.ConvertCsdlToOpenApi(csdlStream, CancellationToken.None);
+            var openApiDoc = await OpenApiService.ConvertCsdlToOpenApi(csdlStream);
             var expectedPathCount = 5;
 
             // Assert
@@ -41,7 +41,7 @@ public async Task ReturnFilteredOpenApiDocBasedOnOperationIdsAndInputCsdlDocumen
             var csdlStream = fileInput.OpenRead();
 
             // Act
-            var openApiDoc = await OpenApiService.ConvertCsdlToOpenApi(csdlStream, CancellationToken.None);
+            var openApiDoc = await OpenApiService.ConvertCsdlToOpenApi(csdlStream);
             var predicate = OpenApiFilterService.CreatePredicate(operationIds, tags);
             var subsetOpenApiDocument = OpenApiFilterService.CreateFilteredDocument(openApiDoc, predicate);