Use the javascript to validate output

Author: A9G-Data-Droid

mermaid-graph/Commands.cs

@@ -10,9 +10,10 @@ namespace MermaidGraph;
 /// </summary>
 public class Commands
 {
-    private readonly StringBuilder _graph;
+    public const string MermaidBegin = Fence + "mermaid";
+    public const string Fence = "```";
 
-    private const string Fence = "```";
+    private readonly StringBuilder _graph;
 
     /// <summary>
     /// Initialize the graph output
@@ -93,7 +94,7 @@ type solution
 
     private void Header(string title)
     {
-        _graph.AppendLine(Fence + "mermaid");
+        _graph.AppendLine(MermaidBegin);
         _graph.AppendLine($"""
                            ---
                            title: {title}

mermaid-graphTests/CommandsTests.cs

@@ -1,4 +1,5 @@
-using NUnit.Framework;
+using Microsoft.ClearScript.V8;
+using NUnit.Framework;
 using Assert = NUnit.Framework.Assert;
 
 namespace MermaidGraph.Tests;
@@ -16,10 +17,12 @@ public void DogFoodSolutionTest()
         var graph = new Commands().Solution(info);
 
         Console.WriteLine(graph);
+        var graphType = DetectType(ExtractMermaid(graph));
+        Console.WriteLine(graphType);
     }
 
     [Test()]
-    public void DogFoodProjectTest()
+    public async Task DogFoodProjectTestAsync()
     {
         var filePath = FindFileDownTree("*.csproj");
         Assert.That(filePath, Is.Not.Null);
@@ -28,6 +31,9 @@ public void DogFoodProjectTest()
         var graph = new Commands().Project(info);
 
         Console.WriteLine(graph);
+
+        var graphType = await MermaidRender(ExtractMermaid(graph));
+        Console.WriteLine(graphType);
     }
 
     [Test()]
@@ -61,7 +67,36 @@ public void CommandLineFailTests(string? file, int hResult)
         Assert.That(Program.Main(file), Is.EqualTo(hResult));
     }
 
-    public static string? FindFileDownTree(string searchPattern)
+    private static string ExtractMermaid(string markup)
+    {
+        Assert.That(markup, Does.StartWith(Commands.MermaidBegin));
+        markup = markup.Substring(Commands.MermaidBegin.Length + Environment.NewLine.Length);
+
+        Assert.That(markup, Does.EndWith(Commands.Fence + Environment.NewLine));
+        return markup.Substring(0, markup.Length - Commands.MermaidBegin.Length + Environment.NewLine.Length);
+    }
+
+    private static string DetectType(string markup)
+    {
+        using var engine = new V8ScriptEngine();
+        var mermaidJs = File.ReadAllText("js\\mermaid.min.js");
+        engine.Execute(mermaidJs);
+
+        return engine.Script.mermaid.detectType(markup);
+    }
+
+    private static async Task<string> MermaidRender(string markup)
+    {
+        using var engine = new V8ScriptEngine();
+        var mermaidJs = File.ReadAllText("js\\mermaid.min.js");
+        engine.Execute(mermaidJs);
+
+        var svg = await engine.Script.mermaid.render(markup);
+        Assert.That(svg, Is.Not.Null);
+        return svg.ToString();
+    }
+
+    private static string? FindFileDownTree(string searchPattern)
     {
         var currentDir = Directory.GetCurrentDirectory();
 

mermaid-graphTests/MermaidGraphTests.csproj

@@ -17,6 +17,8 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="Microsoft.ClearScript.V8" Version="7.4.5" />
+    <PackageReference Include="Microsoft.ClearScript.V8.Native.win-x64" Version="7.4.5" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.7.3" />
     <PackageReference Include="MSTest.TestFramework" Version="3.7.3" />
@@ -36,4 +38,10 @@
     <Using Include="Microsoft.VisualStudio.TestTools.UnitTesting" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Update="js\mermaid.min.js">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>