fix slow lookup and randomly use underscore docset.yml in tests

Author: Mpdreamz

src/Elastic.Markdown/BuildContext.cs

@@ -75,8 +75,7 @@ public BuildContext(IFileSystem readFileSystem, IFileSystem writeFileSystem, str
 			return (rootPath, configurationPath);
 
 		configurationPath = rootPath
-			.EnumerateFiles("docset.yml", SearchOption.AllDirectories)
-			.OrderByDescending(f => f.Name switch { "docset.yml" => 2, "_docset.yml" => 1, _ => 0 })
+			.EnumerateFiles("*docset.yml", SearchOption.AllDirectories)
 			.FirstOrDefault()
 			?? throw new Exception($"Can not locate docset.yml file in '{rootPath}'");
 

tests/authoring/Framework/Setup.fs

@@ -5,6 +5,7 @@
 namespace authoring
 
 
+open System
 open System.Collections.Generic
 open System.IO
 open System.IO.Abstractions.TestingHelpers
@@ -53,7 +54,8 @@ type Setup =
             )
         | _ -> ()
 
-        fileSystem.AddFile(Path.Combine(root.FullName, "docset.yml"), MockFileData(yaml.ToString()));
+        let name = if Random().Next(0, 10) % 2 = 0 then "_docset.yml" else "docset.yml"
+        fileSystem.AddFile(Path.Combine(root.FullName, name), MockFileData(yaml.ToString()));
 
     static member Generator (files: TestFile seq) : Task<GeneratorResults> =