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diff --git a/src/pal/tests/palsuite/c_runtime/_mbsinc/test1/test1.c b/src/pal/tests/palsuite/c_runtime/_mbsinc/test1/test1.c
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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*============================================================================
+**
+** Source: test1.c
+**
+** Purpose:
+** Ensure that this function moves the string pointer ahead one character.
+** First do a basic test to check that the pointer gets moved ahead the one
+** character. Then try with an array of bytes and a NULL array. Each of
+** these should still work by returning a pointer to thePointer+1.
+**
+**
+**==========================================================================*/
+
+#include <palsuite.h>
+
+/*
+ * Note: it seems like these functions would only be useful if they
+ * didn't assume a character was equivalent to a single byte. Be that
+ * as it may, I haven't seen a way to get it to behave otherwise.
+ */
+
+int __cdecl main(int argc, char *argv[])
+{
+ unsigned char *str1 = (unsigned char*) "foo";
+ unsigned char str2[] = {0xC0, 0x80, 0xC0, 0x80, 0};
+ unsigned char str3[] = {0};
+ unsigned char *ret=NULL;
+
+ /*
+ * Initialize the PAL and return FAIL if this fails
+ */
+ if (0 != (PAL_Initialize(argc, argv)))
+ {
+ return FAIL;
+ }
+
+ ret = _mbsinc(str1);
+ if (ret != str1 + 1)
+ {
+ Fail ("ERROR: _mbsinc returned %p. Expected %p\n", ret, str1);
+ }
+
+ ret = _mbsinc(str2);
+ if (ret != str2 + 1)
+ {
+ Fail ("ERROR: _mbsinc returned %p. Expected %p\n", ret, str1);
+ }
+
+ ret = _mbsinc(str3);
+ if (ret != str3 + 1)
+ {
+ Fail ("ERROR: _mbsinc returned %p. Expected %p\n", ret, str1);
+ }
+
+ PAL_Terminate();
+ return PASS;
+}
+