All tests are under Tests folder

This change expects all the tests to be under the Tests folder under the
Perf folder

and some refactorings

src/Test/Perf/helloworld/HelloWorld.csx → src/Test/Perf/Tests/helloworld/HelloWorld.csx

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-#load "../util/test_util.csx"
+#load "../../util/test_util.csx"
 using System.IO;
 
 InitUtilities();

src/Test/Perf/projects/csharp/CSharpCompiler.csx → src/Test/Perf/Tests/projects/csharp/CSharpCompiler.csx

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-#load "../../util/test_util.csx"
+#load "../../../util/test_util.csx"
 using System.IO;
 
 InitUtilities();

src/Test/Perf/runner.csx

@@ -10,13 +10,7 @@ using System;
 
 InitUtilities();
 
-var myDir = MyWorkingDirectory();
-var skip = new HashSet<string> {
-    Path.Combine(myDir, "runner.csx"),
-    Path.Combine(myDir, "bootstrap.csx"),
-    Path.Combine(myDir, "util"),
-    Path.Combine(myDir, "infra"),
-};
+var testDirectory = PerfTestDirectory();
 
 var allResults = new List<Tuple<string, List<Tuple<int, string, object>>>>();
 var failed = false;
@@ -31,7 +25,7 @@ Log("hash: " + StdoutFrom("git", "show --format=\"%h\" HEAD --").Split(new[] {"\
 Log("time: " + DateTime.Now.ToString());
 
 // Run all the scripts that we've found and populate allResults.
-foreach (var script in AllCsiRecursive(myDir, skip)) {
+foreach (var script in GetAllCsxRecursive(testDirectory)) {
     var scriptName = Path.GetFileNameWithoutExtension(script);
     Log("\nRunning " + scriptName);
     try

src/Test/Perf/util/DownloadCPC_util.csx

@@ -3,8 +3,6 @@
 using System;
 using System.IO;
 
-InitUtilities();
-
 public void DownloadCPC()
 {
     var cpcDestinationPath = GetCPCDirectoryPath();

src/Test/Perf/util/runner_util.csx

@@ -38,3 +38,21 @@ async Task<ScriptState<object>> RunFile(string fileName)
     return await state.ContinueWithAsync<object>(text, scriptOptions);
 }
 
+/// Gets all csx file recursively in a given directory
+IEnumerable<string> GetAllCsxRecursive(string directoryName)
+{
+    foreach (var fileName in Directory.EnumerateFiles(directoryName, "*.csx"))
+    {
+        yield return fileName;
+    }
+
+
+    foreach (var childDir in Directory.EnumerateDirectories(directoryName))
+    {
+        foreach (var fileName in GetAllCsxRecursive(childDir))
+        {
+            yield return fileName;
+        }
+    }
+}
+

src/Test/Perf/util/test_util.csx

@@ -81,6 +81,11 @@ string BinDirectory()
     return Path.Combine(RoslynDirectory(), "Binaries");
 }
 
+string PerfTestDirectory()
+{
+    return Path.Combine(RoslynDirectory(), "src", "Test", "Perf", "Tests");
+}
+
 string BinDebugDirectory()
 {
     return Path.Combine(BinDirectory(), "Debug");