Index: /trunk/src/VBox/Runtime/testcase/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Runtime/testcase/Makefile.kmk	(revision 57603)
+++ /trunk/src/VBox/Runtime/testcase/Makefile.kmk	(revision 57604)
@@ -140,6 +140,7 @@
 	tstRTManifest \
 	tstRTUri \
+	tstRTVfs \
 	tstVector \
-       tstRTZip
+	tstRTZip
 
 PROGRAMS.win += \
@@ -636,4 +637,7 @@
 tstRTUri_SOURCES = tstRTUri.cpp
 
+tstRTVfs_TEMPLATE = VBOXR3TSTEXE
+tstRTVfs_SOURCES = tstRTVfs.cpp
+
 tstRTCoreDump_TEMPLACE = VBOXR3TSTEXE
 tstRTCoreDump_SOURCES = tstRTCoreDump.cpp
Index: /trunk/src/VBox/Runtime/testcase/tstRTVfs.cpp
===================================================================
--- /trunk/src/VBox/Runtime/testcase/tstRTVfs.cpp	(revision 57604)
+++ /trunk/src/VBox/Runtime/testcase/tstRTVfs.cpp	(revision 57604)
@@ -0,0 +1,125 @@
+/* $Id$ */
+/** @file
+ * IPRT Testcase - IPRT Virtual File System (VFS) API
+ */
+
+/*
+ * Copyright (C) 2015 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/filesystem.h>
+#include <iprt/vfs.h>
+#include <iprt/err.h>
+#include <iprt/test.h>
+#include <iprt/file.h>
+#include <iprt/string.h>
+
+/*********************************************************************************************************************************
+*   Structures and Typedefs                                                                                                      *
+*********************************************************************************************************************************/
+
+static const char *standardHandleToString(RTHANDLESTD enmHandle)
+{
+    switch (enmHandle)
+    {
+        case RTHANDLESTD_INPUT:  return "STDIN";
+        case RTHANDLESTD_OUTPUT: return "STDOUT";
+        case RTHANDLESTD_ERROR:  return "STDERR";
+        default: break;
+    }
+
+    return "unknown";
+}
+
+static int tstVfsIoFromStandardHandle(RTTEST hTest, RTHANDLESTD enmHandle)
+{
+    RTTestPrintf(hTest, RTTESTLVL_SUB_TEST, "Testing: %s\n", standardHandleToString(enmHandle));
+
+    RTVFSIOSTREAM hVfs = NIL_RTVFSIOSTREAM;
+    int rc = RTVfsIoStrmFromStdHandle(enmHandle, 0, true /*fLeaveOpen*/, &hVfs);
+    if (RT_SUCCESS(rc))
+    {
+        bool fOutput =    enmHandle == RTHANDLESTD_OUTPUT
+                       || enmHandle == RTHANDLESTD_ERROR;
+        if (fOutput)
+        {
+            RTTestPrintf(hTest, RTTESTLVL_SUB_TEST, "Output for %s:\n", standardHandleToString(enmHandle));
+
+            char *pszBufWritten;
+            int cchBuf = RTStrAPrintf(&pszBufWritten, "Testing %s\n", standardHandleToString(enmHandle));
+            Assert(cchBuf);
+            AssertPtr(pszBufWritten);
+
+            size_t cbWritten;
+            rc = RTVfsIoStrmWrite(hVfs, pszBufWritten, strlen(pszBufWritten), true /*fBlocking*/, &cbWritten);
+            if (RT_SUCCESS(rc))
+            {
+                rc = cbWritten == strlen(pszBufWritten) ? VINF_SUCCESS : VERR_NOT_EQUAL;
+                /** @todo Compare written + read output. */
+            }
+
+            RTStrFree(pszBufWritten);
+        }
+        else
+        {
+
+        }
+    }
+    else
+        RTTestPrintf(hTest, RTTESTLVL_ALWAYS, "Error creating VFS I/O stream for %s: %Rrc\n",
+                     standardHandleToString(enmHandle), rc);
+
+    return rc;
+}
+
+int main(int argc, char **argv)
+{
+    /*
+     * Initialize IPRT and create the test.
+     */
+    RTTEST hTest;
+    int rc = RTTestInitAndCreate("tstRTVfs", &hTest);
+    if (rc)
+        return rc;
+    RTTestBanner(hTest);
+
+    do
+    {
+        rc = tstVfsIoFromStandardHandle(hTest, RTHANDLESTD_INPUT);
+        RTTESTI_CHECK_BREAK(rc == VINF_SUCCESS);
+
+        rc = tstVfsIoFromStandardHandle(hTest, RTHANDLESTD_OUTPUT);
+        RTTESTI_CHECK_BREAK(rc == VINF_SUCCESS);
+
+        rc = tstVfsIoFromStandardHandle(hTest, RTHANDLESTD_ERROR);
+        RTTESTI_CHECK_BREAK(rc == VINF_SUCCESS);
+
+    } while (0);
+
+    /*
+     * Summary
+     */
+    return RTTestSummaryAndDestroy(hTest);
+}
+