Update output file extension and register the Yaml reader

Author: MaggieKimani1

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

@@ -206,7 +206,7 @@ public async Task TransformCommandConvertsOpenApiWithDefaultOutputNameAndSwitchF
             // create a dummy ILogger instance for testing
             await OpenApiService.TransformOpenApiDocument(options, _logger);
 
-            var output = await File.ReadAllTextAsync("output.yml");
+            var output = await File.ReadAllTextAsync("output.yaml");
             Assert.NotEmpty(output);
         }
 
@@ -242,7 +242,7 @@ public async Task TransformToPowerShellCompliantOpenApi()
             // create a dummy ILogger instance for testing
             await OpenApiService.TransformOpenApiDocument(options, _logger);
 
-            var output = await File.ReadAllTextAsync("output.yml");
+            var output = await File.ReadAllTextAsync("output.yaml");
             Assert.NotEmpty(output);
         }
 

test/Microsoft.OpenApi.Readers.Tests/V2Tests/ComparisonTests.cs

@@ -4,6 +4,7 @@
 using System.IO;
 using FluentAssertions;
 using Microsoft.OpenApi.Models;
+using Microsoft.OpenApi.Reader;
 using Xunit;
 
 namespace Microsoft.OpenApi.Readers.Tests.V2Tests
@@ -19,6 +20,7 @@ public class ComparisonTests
         //[InlineData("definitions")]  //Currently broken due to V3 references not behaving the same as V2
         public void EquivalentV2AndV3DocumentsShouldProductEquivalentObjects(string fileName)
         {
+            OpenApiReaderRegistry.RegisterReader("yaml", new OpenApiYamlReader());
             using var streamV2 = Resources.GetStream(Path.Combine(SampleFolderPath, $"{fileName}.v2.yaml"));
             using var streamV3 = Resources.GetStream(Path.Combine(SampleFolderPath, $"{fileName}.v3.yaml"));
             var result1 = OpenApiDocument.Load(Path.Combine(SampleFolderPath, $"{fileName}.v2.yaml"));