private static void Main(string[] args)
{
CeasarCipher start = new CeasarCipher(1);
start.Encrypt("home work 2");
Console.WriteLine(start.Encrypt("home work 2"));
string nemp = start.Encrypt("home work 2");
start.Decrypt(nemp);
Console.WriteLine(start.Decrypt(nemp));
}
public void Dencrypt_WhenEmptyStringIsPassed_ReturnEmptyString()
{
var cipher = new CeasarCipher(offset: 0);
var encrypted = cipher.Decrypt("");
Assert.IsEmpty(encrypted);
}
public void Dencrypt_WhenEmptyStringIsPassed_ReturnEmptyString()
{
var cipher = new CeasarCipher(offset: 0);
var encrypted = cipher.Decrypt("");
Assert.IsEmpty(encrypted);
}
public void EncryptDecrypt_WithRandomSting_ProducesTheSameResult()
{
var cipher = new CeasarCipher(offset: 5);
var word = "Testing with some random string";
var encrypted = cipher.Encrypt(word);
Assert.AreEqual(word, cipher.Decrypt(encrypted));
}
public void Decrypt_WithOverflow_ShouldStartFromBegingingOfAlphabet()
{
var cipher = new CeasarCipher(offset: 1);
var word = "!";
var encrypted = cipher.Decrypt(word);
Assert.AreEqual("~", encrypted);
}
public void EncryptDecrypt_WithRandomSting_plus_enter()
{
var cipher = new CeasarCipher(offset: 5);
var word = "Testing with \r some random string";
var encrypted = cipher.Encrypt(word);
Assert.AreEqual(word, cipher.Decrypt(encrypted));
}
public void Decrypt_WithOverflow_ShouldStartFromBegingingOfAlphabet()
{
var cipher = new CeasarCipher(offset: 1);
var word = "!";
var encrypted = cipher.Decrypt(word);
Assert.AreEqual("~", encrypted);
}
public void Dencrypt_WhenPassedNull_ThrowsArgumentNullException()
{
var cipher = new CeasarCipher(offset: 0);
Assert.Throws<ArgumentNullException>(() =>
{
cipher.Decrypt(null);
});
}
public void Decrypt_WithZeroOffset_ReturnTheSameWord()
{
var cipher = new CeasarCipher(offset: 0);
var word = "random";
var encrypted = cipher.Decrypt(word);
Assert.AreEqual(word, encrypted);
}
public void EncryptDecrypt_WithOffsetLargerThanAlphabet_ProducesTheSameResult()
{
var cipher = new CeasarCipher(offset: 5);
var word = "Test string";
var encrypted = cipher.Encrypt(word);
Assert.AreEqual(word, cipher.Decrypt(encrypted));
}
public void Decrypt_WithOneOffset_ShiftsSymbolsOnOnePosition()
{
var cipher = new CeasarCipher(offset: 1);
var word = "b";
var encrypted = cipher.Decrypt(word);
Assert.AreEqual("a", encrypted);
}
public void EncryptDecrypt_WithRandomSting_ProducesTheSameResult()
{
var cipher = new CeasarCipher(offset: 5);
var word = "Testing with some random string";
var encrypted = cipher.Encrypt(word);
Assert.AreEqual(word, cipher.Decrypt(encrypted));
}
public void Decrypt_WithNegativeOffsetOverflow_ShouldStartFromBeginningOfAlphabet()
{
var cipher = new CeasarCipher(offset: -1);
var word = "~";
var decrypted = cipher.Decrypt(word);
Assert.AreEqual("!", decrypted);
}
public void EncryptDecrypt_WithMinOffset()
{
var cipher = new CeasarCipher(offset: int.MinValue);
var word = "Testing with some random string";
var encrypted = cipher.Encrypt(word);
Assert.AreEqual(word, cipher.Decrypt(encrypted));
}
public void Decrypt_WithOneOffset_ShiftsSymbolsOnOnePosition()
{
var cipher = new CeasarCipher(offset: 1);
var word = "b";
var encrypted = cipher.Decrypt(word);
Assert.AreEqual("a", encrypted);
}
public void Decrypt_WithZeroOffset_ReturnTheSameWord()
{
var cipher = new CeasarCipher(offset: 0);
var word = "random";
var encrypted = cipher.Decrypt(word);
Assert.AreEqual(word, encrypted);
}
public void Dencrypt_WhenPassedNull_ThrowsArgumentNullException()
{
var cipher = new CeasarCipher(offset: 0);
Assert.Throws <ArgumentNullException>(() =>
{
cipher.Decrypt(null);
});
}
public void Dencrypt_WhenPassedWrongSymbol_ThrowsArgumentOutOfRangeException()
{
var cipher = new CeasarCipher(offset: 0);
var nonSymbol = (char)127;
var nonSymbolString = new string(new[] { nonSymbol });
Assert.Throws<ArgumentOutOfRangeException>(() =>
{
cipher.Decrypt(nonSymbolString);
});
}
public void Dencrypt_WhenPassedWrongSymbol_ThrowsArgumentOutOfRangeException()
{
var cipher = new CeasarCipher(offset: 0);
var nonSymbol = (char)127;
var nonSymbolString = new string(new[] { nonSymbol });
Assert.Throws <ArgumentOutOfRangeException>(() =>
{
cipher.Decrypt(nonSymbolString);
});
}
public void EncryptDecrypt_WithMinOffset()
{
var cipher = new CeasarCipher(offset: int.MinValue);
var word = "Testing with some random string";
var encrypted = cipher.Encrypt(word);
Assert.AreEqual(word, cipher.Decrypt(encrypted));
}