1 files changed, 76 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/miscellaneous/_i64tow/test1/test1.cpp b/src/pal/tests/palsuite/miscellaneous/_i64tow/test1/test1.cpp
new file mode 100644
index 0000000000..9a8ae07089
--- /dev/null
+++ b/src/pal/tests/palsuite/miscellaneous/_i64tow/test1/test1.cpp
@@ -0,0 +1,76 @@
+// 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: Tests _i64tow_s with normal values and different radices, negative 
+**          values, as well as the highest and lowest values.
+**
+**
+**============================================================*/
+
+#include <palsuite.h>
+
+typedef struct
+{
+    INT64 value;
+    int radix;
+    char *result;
+} testCase;
+
+
+int __cdecl main(int argc, char *argv[])
+{
+    WCHAR buffer[256];
+    WCHAR *testStr;
+    WCHAR *ret;
+    int i;
+    testCase testCases[] = 
+    {
+        {42, 10, "42"},
+        {42, 2, "101010"},
+        {29, 32, "t"},
+        {-1, 10, "-1"},
+        {-1, 8, "1777777777777777777777"},
+        {-1, 32, "fvvvvvvvvvvvv"},
+        {I64(0x7FFFFFFFFFFFFFFF), 10, "9223372036854775807"},
+        {I64(0x8000000000000000), 10, "-9223372036854775808"},
+        {0,2,"0"},
+        {0,16,"0"},
+        {3,16,"3"},
+        {15,16,"f"},
+        {16,16,"10"},
+        
+    };
+
+
+    if (0 != (PAL_Initialize(argc, argv)))
+    {
+        return FAIL;
+    }
+
+    for (i=0; i<sizeof(testCases) / sizeof(testCase); i++)
+    {
+        errno_t err = _i64tow_s(testCases[i].value, buffer, sizeof(buffer) / sizeof(buffer[0]), testCases[i].radix);
+
+        if(err != 0)
+        {
+            Fail("ERROR: _i64tow_s didn't return success, error code %d.\n", err);
+        }
+
+        testStr = convert(testCases[i].result);
+        if (wcscmp(testStr, buffer) != 0)
+        {
+            Fail("_i64tow_s did not give the correct string.\n"
+                "Expected %S, got %S\n", testStr, buffer);
+        }
+        free(testStr);
+    }
+    
+   
+    PAL_Terminate();
+    return PASS;
+}