Removing Microsoft.DotNet.TestFramework from the product code and from the SDK deployment and moving the code to the test folder.

test/Microsoft.DotNet.TestFramework/TestAssets.cs

@@ -0,0 +1,91 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Threading.Tasks;
+using Microsoft.DotNet.Cli.Utils;
+
+namespace Microsoft.DotNet.TestFramework
+{
+    public class TestAssets
+    {
+        private DirectoryInfo _root;
+
+        private FileInfo _dotnetCsprojExe;
+
+        private string _testWorkingFolder;
+
+        public FileInfo DotnetCsprojExe => _dotnetCsprojExe;
+
+        public TestAssets(DirectoryInfo assetsRoot, FileInfo dotnetCsprojExe, string testWorkingFolder)
+        {
+            if (assetsRoot == null)
+            {
+                throw new ArgumentNullException(nameof(assetsRoot));
+            }
+
+            if (dotnetCsprojExe == null)
+            {
+                throw new ArgumentNullException(nameof(dotnetCsprojExe));
+            }
+
+            if (!assetsRoot.Exists)
+            {
+                throw new DirectoryNotFoundException($"Directory not found at '{assetsRoot}'");
+            }
+
+            if (!dotnetCsprojExe.Exists)
+            {
+                throw new FileNotFoundException("Csproj dotnet executable must exist", dotnetCsprojExe.FullName);
+            }
+
+            _root = assetsRoot;
+
+            _dotnetCsprojExe = dotnetCsprojExe;
+            _testWorkingFolder = testWorkingFolder;
+        }
+
+        public TestAssetInfo Get(string name)
+        {
+            return Get(TestAssetKinds.TestProjects, name);
+        }
+
+        public TestAssetInfo Get(string kind, string name)
+        {
+            var assetDirectory = new DirectoryInfo(Path.Combine(_root.FullName, kind, name));
+
+            return new TestAssetInfo(
+                assetDirectory, 
+                name, 
+                this);
+        }
+
+        public DirectoryInfo CreateTestDirectory(string testProjectName = "temp", [CallerMemberName] string callingMethod = "", string identifier = "")
+        {
+            var testDestination = GetTestDestinationDirectoryPath(testProjectName, callingMethod, identifier);
+
+            var testDirectory = new DirectoryInfo(testDestination);
+
+            testDirectory.EnsureExistsAndEmpty();
+
+            return testDirectory;
+        }
+
+        private string GetTestDestinationDirectoryPath(string testProjectName, string callingMethod, string identifier)
+        {
+#if NET451
+            string baseDirectory = AppDomain.CurrentDomain.BaseDirectory;
+#else
+            string baseDirectory = AppContext.BaseDirectory;
+#endif
+            //  Find the name of the assembly the test comes from based on the the base directory and how the output path has been constructed
+            string testAssemblyName = new DirectoryInfo(baseDirectory).Parent.Parent.Name;
+
+            return Path.Combine(_testWorkingFolder, testAssemblyName, callingMethod + identifier, testProjectName);
+        }
+    }
+}