Test that configured directory extists.

source/GlassView.Export.Test/GlassViewTest.cs

@@ -7,18 +7,37 @@ public class GlassViewTest
 {
 
     [Fact]
-    public void ConfigureWithDirectory_ReturnsDirectoryExporter()
+    public void ConfigureWithDirectoryReturnsDirectoryExporter()
     {
         String path = Path.Combine("some", "export", "path");
-        IConfiguration configuration = ReadFromJson(DirectoryExportJson(path));
+        IConfiguration configuration = ConfigFromJson(DirectoryExportJson(path));
         IGlassView publicExporter = GlassView.Configure(configuration);
 
         var exporter = Assert.IsType<SummaryExporter>(publicExporter);
         var directoryExporter = Assert.Single(exporter);
         Assert.IsType<DirectoryExport>(directoryExporter);
     }
 
-    private static IConfiguration ReadFromJson(String json)
+    [Fact]
+    public void ConfigureWithDirectoryCreatesTheExportPathAsNeeded()
+    {
+        const String topPath = "top";
+        var path = Path.Combine(topPath, "this", "path", "does", "not", "exist", "yet");
+        IConfiguration configuration = ConfigFromJson(DirectoryExportJson(path));
+
+        Assert.False(Directory.Exists(path), "Precondition failed: directory already exists.");
+
+        try {
+            var exporter = GlassView.Configure(configuration);
+            Assert.True(Directory.Exists(path), "The directory was not created.");
+            Assert.NotNull(exporter); // Avoid warnings & the compiler optimising away the configure step.
+        }
+        finally {
+            Directory.Delete(topPath, recursive: true);
+        }
+    }
+
+    private static IConfiguration ConfigFromJson(String json)
     {
         return new ConfigurationBuilder()
             .AddJsonStream(new MemoryStream(Encoding.UTF8.GetBytes(json)))

source/GlassView.Export/Extensions.cs

@@ -1,8 +1,5 @@
 using System.Text.Json;
-using BenchmarkDotNet.Reports;
 using Atmoos.GlassView.Core;
-using Microsoft.Extensions.Configuration;
-using static System.Threading.Tasks.ConfigureAwaitOptions;
 
 namespace Atmoos.GlassView.Export;
 
@@ -26,11 +23,12 @@ private static JsonSerializerOptions Options(JsonSerializerOptions options)
     }
 
     /// <summary>
-    /// Find the leaf directory in the current directory structure.
+    /// Recursively looks upward toward parent directories for the leaf directory <paramref name="leafDirectoryName"/>
+    /// in the current directory structure staring at the current working directory.
     /// </summary>
     /// <param name="leafDirectoryName">The leaf directories name.</param>
-    /// <returns>If found returns that directory.
-    /// When not found returns the leaf directory as subdirectory of the current directory.</returns>
+    /// <returns>If found, returns that directory.
+    /// When not found, returns the leaf directory as subdirectory of the current directory.</returns>
     internal static DirectoryInfo FindLeaf(String leafDirectoryName)
     {
         DirectoryInfo? result;

source/GlassView.Export/GlassView.cs

@@ -42,7 +42,7 @@ public static IGlassView Configure(IConfiguration config, ILogger logger)
         return new SummaryExporter(exporters, logger);
     }
 
-    private static DirectoryInfo GlassViewArtifactsDirectory() => Extensions.FindLeaf("BenchmarkDotNet.Artifacts").CreateSubdirectory(nameof(GlassView));
+    private static DirectoryInfo GlassViewArtifactsDirectory() => FindLeaf("BenchmarkDotNet.Artifacts").CreateSubdirectory(nameof(GlassView));
 
     private static JsonSerializerOptions SerializationOptions() => new JsonSerializerOptions().EnableGlassView();
 }