fix some warnings

Author: SimonCropp

src/Microsoft.OpenApi.Hidi/OpenApiService.cs

@@ -81,7 +81,7 @@ public static async Task TransformOpenApiDocument(HidiOptions options, ILogger l
                 if (!string.IsNullOrEmpty(options.FilterOptions?.FilterByCollection))
                 {
                     using var collectionStream = await GetStream(options.FilterOptions.FilterByCollection, logger, cancellationToken).ConfigureAwait(false);
-                    postmanCollection = JsonDocument.Parse(collectionStream);
+                    postmanCollection = await JsonDocument.ParseAsync(collectionStream, cancellationToken: cancellationToken).ConfigureAwait(false);
                 }
 
                 // Load OpenAPI document
@@ -132,7 +132,8 @@ public static async Task TransformOpenApiDocument(HidiOptions options, ILogger l
                 }
                 using (var fileStream = await GetStream(apiManifestRef[0], logger, cancellationToken).ConfigureAwait(false))
                 {
-                    apiManifest = ApiManifestDocument.Load(JsonDocument.Parse(fileStream).RootElement);
+                    var document = await JsonDocument.ParseAsync(fileStream, cancellationToken: cancellationToken).ConfigureAwait(false);
+                    apiManifest = ApiManifestDocument.Load(document.RootElement);
                 }
 
                 apiDependency = !string.IsNullOrEmpty(apiDependencyName) && apiManifest.ApiDependencies.TryGetValue(apiDependencyName, out var dependency) ? dependency : apiManifest.ApiDependencies.First().Value;
@@ -453,13 +454,13 @@ private static Dictionary<string, List<string>> EnumerateJsonDocument(JsonElemen
                         // Fetch list of methods and urls from collection, store them in a dictionary
                         var path = request.GetProperty("url").GetProperty("raw").ToString();
                         var method = request.GetProperty("method").ToString();
-                        if (!paths.ContainsKey(path))
+                        if (paths.TryGetValue(path, out var value))
                         {
-                            paths.Add(path, new List<string> { method });
+                            value.Add(method);
                         }
                         else
                         {
-                            paths[path].Add(method);
+                            paths.Add(path, new List<string> {method});
                         }
                     }
                     else
@@ -755,7 +756,7 @@ internal static async Task PluginManifest(HidiOptions options, ILogger logger, C
             using var file = new FileStream(manifestFile.FullName, FileMode.Create);
             using var jsonWriter = new Utf8JsonWriter(file, new JsonWriterOptions { Indented = true });
             manifest.Write(jsonWriter);
-            jsonWriter.Flush();
+            await jsonWriter.FlushAsync(cancellationToken).ConfigureAwait(false);
         }
     }
 }

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

@@ -144,7 +144,7 @@ public async Task ShowCommandGeneratesMermaidMarkdownFileWithMermaidDiagram()
 
             await OpenApiService.ShowOpenApiDocument(options, _logger, new CancellationToken());
 
-            var output = File.ReadAllText(options.Output.FullName);
+            var output = await File.ReadAllTextAsync(options.Output.FullName);
             Assert.Contains("graph LR", output, StringComparison.Ordinal);
         }
 
@@ -172,7 +172,7 @@ public async Task ShowCommandGeneratesMermaidMarkdownFileFromCsdlWithMermaidDiag
             // create a dummy ILogger instance for testing
             await OpenApiService.ShowOpenApiDocument(options, _logger, new CancellationToken());
 
-            var output = File.ReadAllText(options.Output.FullName);
+            var output = await File.ReadAllTextAsync(options.Output.FullName);
             Assert.Contains("graph LR", output, StringComparison.Ordinal);
         }
 
@@ -223,7 +223,7 @@ public async Task TransformCommandConvertsOpenApi()
             // create a dummy ILogger instance for testing
             await OpenApiService.TransformOpenApiDocument(options, _logger, new CancellationToken());
 
-            var output = File.ReadAllText("sample.json");
+            var output = await File.ReadAllTextAsync("sample.json");
             Assert.NotEmpty(output);
         }
 
@@ -242,7 +242,7 @@ public async Task TransformCommandConvertsOpenApiWithDefaultOutputName()
             // create a dummy ILogger instance for testing
             await OpenApiService.TransformOpenApiDocument(options, _logger, new CancellationToken());
 
-            var output = File.ReadAllText("output.yml");
+            var output = await File.ReadAllTextAsync("output.yml");
             Assert.NotEmpty(output);
         }
 
@@ -260,7 +260,7 @@ public async Task TransformCommandConvertsCsdlWithDefaultOutputName()
             // create a dummy ILogger instance for testing
             await OpenApiService.TransformOpenApiDocument(options, _logger, new CancellationToken());
 
-            var output = File.ReadAllText("output.yml");
+            var output = await File.ReadAllTextAsync("output.yml");
             Assert.NotEmpty(output);
         }
 
@@ -280,7 +280,7 @@ public async Task TransformCommandConvertsOpenApiWithDefaultOutputNameAndSwitchF
             // create a dummy ILogger instance for testing
             await OpenApiService.TransformOpenApiDocument(options, _logger, new CancellationToken());
 
-            var output = File.ReadAllText("output.yml");
+            var output = await File.ReadAllTextAsync("output.yml");
             Assert.NotEmpty(output);
         }
 
@@ -317,7 +317,7 @@ public async Task TransformToPowerShellCompliantOpenApi()
             // create a dummy ILogger instance for testing
             await OpenApiService.TransformOpenApiDocument(options, _logger, new CancellationToken());
 
-            var output = File.ReadAllText("output.yml");
+            var output = await File.ReadAllTextAsync("output.yml");
             Assert.NotEmpty(output);
         }