/// <summary>
///
/// Question 14
///
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string Decode(string str)
{
// Why does this work? It is a simle one to one direct mapping.
// Mapping the resulting chars back to originals is simply done
// by encoding again.
string resultStr = AtbashCipher.Encode(str).Replace(" ", "");
return(resultStr);
}
public void Atbash()
{
AtbashCipher cipher = new AtbashCipher();
const string plaintext = "Abcdefghijklmnopqrstuvwxyz";
const string ciphertext = "Zyxwvutsrqponmlkjihgfedcba";
Assert.AreEqual(ciphertext, cipher.Encrypt(plaintext));
Assert.AreEqual(plaintext, cipher.Decrypt(ciphertext));
}
public void Decode_with_no_spaces()
{
Assert.Equal("anobstacleisoftenasteppingstone", AtbashCipher.Decode("zmlyhgzxovrhlugvmzhgvkkrmthglmv"));
}
public void Decode_with_too_many_spaces()
{
Assert.Equal("exercism", AtbashCipher.Decode("vc vix r hn"));
}
public void Decode_all_the_letters()
{
Assert.Equal("thequickbrownfoxjumpsoverthelazydog", AtbashCipher.Decode("gsvjf rxpyi ldmul cqfnk hlevi gsvoz abwlt"));
}
public void Decode_numbers()
{
Assert.Equal("testing123testing", AtbashCipher.Decode("gvhgr mt123 gvhgr mt"));
}
public void Decode_exercism()
{
Assert.Equal("exercism", AtbashCipher.Decode("vcvix rhn"));
}
public void Encode_deep_thought()
{
Assert.Equal("gifgs rhurx grlm", AtbashCipher.Encode("Truth is fiction."));
}
public void Encode_numbers()
{
Assert.Equal("gvhgr mt123 gvhgr mt", AtbashCipher.Encode("Testing,1 2 3, testing."));
}
public void Encode_mindblowingly()
{
Assert.Equal("nrmwy oldrm tob", AtbashCipher.Encode("mindblowingly"));
}
public void Encode_spaces()
{
Assert.Equal("lnt", AtbashCipher.Encode("O M G"));
}
public void Encode_no()
{
Assert.Equal("ml", AtbashCipher.Encode("no"));
}
public void Encode_yes()
{
Assert.Equal("bvh", AtbashCipher.Encode("yes"));
}
public AtbashCipherTests()
{
this.atbashCipher = new AtbashCipher(new ValiatorAndConverter());
}
