Put everything back.

ctrtool/deps/libtoolchain/test/io_SubStream_TestClass.h

@@ -0,0 +1,18 @@
+#pragma once
+#include "ITestClass.h"
+
+#include <tc/io.h>
+#include <tc/ArgumentOutOfRangeException.h>
+#include <tc/NotImplementedException.h>
+
+class io_SubStream_TestClass : public ITestClass
+{
+public:
+	void runAllTests();
+private:
+	void testProperties();
+	void testSize();
+	void testSeekPos();
+	void testRead();
+	void testWrite();
+};