Add plugin command test.

Author: peombwa

src/Microsoft.OpenApi.Hidi/Options/CommandOptions.cs

@@ -98,7 +98,6 @@ public IReadOnlyList<Option> GetPluginCommandOptions()
         {
             return new List<Option>
             {
-
                 ManifestOption,
                 OutputFolderOption,
                 CleanOutputOption,

test/Microsoft.OpenApi.Hidi.Tests/Formatters/PowerShellFormatterTests.cs

@@ -85,9 +85,9 @@ public void ResolveFunctionParameters()
             var idsParameter = openApiDocument.Paths["/foo"].Operations[OperationType.Get].Parameters.Where(static p => p.Name == "ids").FirstOrDefault();
 
             // Assert
-            Assert.Null(idsParameter.Content);
-            Assert.NotNull(idsParameter.Schema);
-            Assert.Equal("array", idsParameter.Schema.Type);
+            Assert.Null(idsParameter?.Content);
+            Assert.NotNull(idsParameter?.Schema);
+            Assert.Equal("array", idsParameter?.Schema.Type);
         }
 
         private static OpenApiDocument GetSampleOpenApiDocument()

test/Microsoft.OpenApi.Hidi.Tests/Microsoft.OpenApi.Hidi.Tests.csproj

@@ -62,6 +62,9 @@
      <None Update="UtilityFiles\examplepowershellsettings.json">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
+    <None Update="UtilityFiles\exampleapimanifest.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
 
 </Project>

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

@@ -4,8 +4,10 @@
 using System.CommandLine;
 using System.CommandLine.Invocation;
 using System.CommandLine.Parsing;
+using System.Text.Json;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Logging;
+using Microsoft.OpenApi.ApiManifest.OpenAI;
 using Microsoft.OpenApi.Hidi.Options;
 using Microsoft.OpenApi.Hidi.Utilities;
 using Microsoft.OpenApi.Models;
@@ -349,6 +351,25 @@ public void InvokeShowCommand()
             Assert.Contains("graph LR", output);
         }
 
+        [Fact]
+        public void InvokePluginCommand()
+        {
+            var rootCommand = Program.CreateRootCommand();
+            var args = new string[] { "plugin", "-m", ".\\UtilityFiles\\exampleapimanifest.json", "--of", AppDomain.CurrentDomain.BaseDirectory };
+            var parseResult = rootCommand.Parse(args);
+            var handler = rootCommand.Subcommands.Where(c => c.Name == "plugin").First().Handler;
+            var context = new InvocationContext(parseResult);
+
+            handler!.Invoke(context);
+
+            using var jsDoc = JsonDocument.Parse(File.ReadAllText("ai-plugin.json"));
+            var openAiManifest = OpenAIPluginManifest.Load(jsDoc.RootElement);
+
+            Assert.Equal("Mastodon - Subset", openAiManifest?.NameForHuman);
+            Assert.Equal("openapi", openAiManifest?.Api.Type);
+            Assert.Equal("./openapi.json", openAiManifest?.Api.Url);
+        }
+
 
         // Relatively useless test to keep the code coverage metrics happy
         [Fact]