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+/*********************************************************************
+* Filename: rot-13_test.c
+* Author: Brad Conte (brad AT bradconte.com)
+* Copyright:
+* Disclaimer: This code is presented "as is" without any guarantees.
+* Details: Performs known-answer tests on the corresponding ROT-13
+ implementation. These tests do not encompass the full
+ range of available test vectors, however, if the tests
+ pass it is very, very likely that the code is correct
+ and was compiled properly. This code also serves as
+ example usage of the functions.
+*********************************************************************/
+
+/*************************** HEADER FILES ***************************/
+#include <stdio.h>
+#include <string.h>
+#include "rot-13.h"
+
+/*********************** FUNCTION DEFINITIONS ***********************/
+int rot13_test()
+{
+ char text[] = {"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"};
+ char code[] = {"NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm"};
+ char buf[1024];
+ int pass = 1;
+
+ // To encode, just apply ROT-13.
+ strcpy(buf, text);
+ rot13(buf);
+ pass = pass && !strcmp(code, buf);
+
+ // To decode, just re-apply ROT-13.
+ rot13(buf);
+ pass = pass && !strcmp(text, buf);
+
+ return(pass);
+}
+
+int main()
+{
+ printf("ROT-13 tests: %s\n", rot13_test() ? "SUCCEEDED" : "FAILED");
+
+ return(0);
+}