public void GenerateIV_GeneratesDifferentResult_EachTimeCalled()
{
//Arrange
var iv = new RandomIV();
int blockSize = 128;
byte[] iv1;
byte[] iv2;
//Act
iv1 = iv.GenerateIV(blockSize);
iv2 = iv.GenerateIV(blockSize);
//Assert
Assert.IsFalse(iv1.SequenceEqual(iv2));
}
public void GenerateIV_ThrowsArgumentOutOfRangeException_WhenBlockSizeIsLessThanAByte()
{
//Arrange
var iv = new RandomIV();
int blockSize = 7;
//Act
//Assert
iv.GenerateIV(blockSize);
}
public void GenerateIV_ReturnsNonZeroArray_WhenBlockSizeIsMoreThanOrEqualToOneByte()
{
//Arrange
var iv = new RandomIV();
int blockSize = 9;
byte[] actual;
//Act
actual = iv.GenerateIV(blockSize);
//Assert
Assert.IsNotNull(actual);
Assert.IsTrue(actual.Length > 0);
}
public void GenerateIV_Returns16ByteArray_WhenBlockSizeIs128()
{
//Arrange
var iv = new RandomIV();
int blockSize = 128;
const int expected = 16;
int actual;
//Act
actual = iv.GenerateIV(blockSize).Length;
//Assert
Assert.AreEqual(expected, actual);
}