1 files changed, 88 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/c_runtime/_wfopen/test4/test4.c b/src/pal/tests/palsuite/c_runtime/_wfopen/test4/test4.c
new file mode 100644
index 0000000000..b80db180ef
--- /dev/null
+++ b/src/pal/tests/palsuite/c_runtime/_wfopen/test4/test4.c
@@ -0,0 +1,88 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information. 
+//
+
+/*=====================================================================
+**
+** Source:  test4.c
+**
+** Purpose: Tests the PAL implementation of the _wfopen function. 
+**          Test to ensure that you can't write to a 'r' mode file.
+**          And that you can read from a 'r' mode file.
+**
+** Depends:
+**      fprintf
+**      fclose
+**      fgets
+**  
+
+**
+**===================================================================*/
+
+#define UNICODE                                                          
+
+#include <palsuite.h>
+
+int __cdecl main(int argc, char **argv)
+{
+  
+    FILE *fp;
+    char buffer[128];
+    WCHAR filename[] = {'t','e','s','t','f','i','l','e','\0'};
+    WCHAR write[] = {'w','\0'};
+    WCHAR read[] = {'r','\0'};
+
+    if (PAL_Initialize(argc, argv))
+    {
+        return FAIL;
+    }
+
+  
+    /* Open a file with 'w' mode */
+    if( (fp = _wfopen( filename, write )) == NULL )
+    {
+        Fail( "ERROR: The file failed to open with 'w' mode.\n" );
+    }  
+  
+    /* Write some text to the file */
+    if(fprintf(fp,"%s","some text") <= 0) 
+    {
+        Fail("ERROR: Attempted to WRITE to a file opened with 'w' mode "
+               "but fprintf failed.  Either fopen or fprintf have problems.");
+    }
+
+    if(fclose(fp))
+    {
+        Fail("ERROR: Attempted to close a file, but fclose failed. "
+               "This test depends upon it.");
+    }
+
+    /* Open a file with 'r' mode */
+    if( (fp = _wfopen( filename, read )) == NULL )
+    {
+        Fail( "ERROR: The file failed to open with 'r' mode.\n" );
+    } 
+  
+    /* Attempt to read from the 'r' only file, should pass */
+    if(fgets(buffer,10,fp) == NULL)
+    {
+        Fail("ERROR: Tried to READ from a file with 'r' mode set. "
+               "This should succeed, but fgets returned NULL.  Either fgets "
+               "or fopen is broken.");
+    }
+
+    /* Write some text to the file */
+    if(fprintf(fp,"%s","some text") > 0) 
+    {
+        Fail("ERROR: Attempted to WRITE to a file opened with 'r' mode "
+               "but fprintf succeeded  It should have failed.  "
+               "Either fopen or fprintf have problems.");
+    }
+ 
+
+    PAL_Terminate();
+    return PASS;
+}
+   
+