Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

mcs/class/test-helpers/PathHelpers.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+
+namespace MonoTests.Helpers {
+
+	/// <summary>
+	/// Represents a temporary directory.  Creating an instance creates a directory at the specified path,
+	/// and disposing the instance deletes the directory.
+	/// </summary>
+	public sealed class TempDirectory : IDisposable
+	{
+		/// <summary>Gets the created directory's path.</summary>
+		public string Path { get; private set; }
+
+		public TempDirectory ()
+			: this (CreateTemporaryDirectory ())
+		{
+		}
+
+		public TempDirectory (string path)
+		{
+			Path = path;
+		}
+
+		~TempDirectory ()
+		{
+			Dispose ();
+		}
+
+		public void Dispose()
+		{
+			GC.SuppressFinalize (this);
+			DeleteDirectory (Path);
+		}
+
+		// Tries to recursively delete the specified path.
+		// Doesn't throw exceptions if path is null, empty, or doesn't exist.
+		public static void DeleteDirectory (string path)
+		{
+			if (string.IsNullOrEmpty (path))
+				return;
+
+			if (Directory.Exists (path))
+				Directory.Delete (path, true);
+		}
+
+		// Creates a unique temporary directory.
+		//
+		// The calling method's type/method name will be a part of the
+		// returned path to make it somewhat nicer/more useful.
+		//
+		// This method is only meant for testing code, not production code (it
+		// will leave some temporary directories behind).
+		static string CreateTemporaryDirectory ()
+		{
+			var name = string.Empty;
+			var calling_method = new StackFrame (2).GetMethod ();
+			if (calling_method != null)
+				name = calling_method.DeclaringType.FullName + "_" + calling_method.Name + "_";
+
+			var rv = global::System.IO.Path.Combine (global::System.IO.Path.GetTempPath (), name + Guid.NewGuid ().ToString ());
+			Directory.CreateDirectory (rv);
+			return rv;
+		}
+	}
+}