public void FillHalfTheBufferThenReadThenWriteTheRemainingSize()
{
//arrange
BytesRingBuffer bytesRingBuffer = new BytesRingBuffer(10);
string temp = new string('x', 5);
byte[] tempInBytes = Encoding.UTF8.GetBytes(temp);
//act
bytesRingBuffer.Write(tempInBytes, 0, tempInBytes.Length);
//Assert
Assert.AreEqual(5, bytesRingBuffer.FreeBytes);
//act
byte[] readBuffer = new byte[10];
int bytesCopied;
bytesRingBuffer.Read(readBuffer, 0, readBuffer.Length, out bytesCopied);
//Assert
Assert.AreEqual(5, bytesRingBuffer.ReadOffset, "ReadOffset should have moved");
Assert.AreEqual(10, bytesRingBuffer.FreeBytes, "Whole buffer should be free");
tempInBytes = Encoding.UTF8.GetBytes(new string('x', 10));
var wrote = bytesRingBuffer.Write(tempInBytes, 0, tempInBytes.Length);
Assert.IsTrue(wrote, "Should have written the buffer.");
var read = bytesRingBuffer.Read(readBuffer, 0, readBuffer.Length, out bytesCopied);
Assert.IsTrue(read, "Should have read the buffer.");
Assert.AreEqual(new string('x', 10), Encoding.UTF8.GetString(readBuffer), "Should be 10*x");
}
public void GivenAFullBufferFreeBytesShoulsbeZero()
{
//arrange
BytesRingBuffer bytesRingBuffer = new BytesRingBuffer(10);
string temp = new string('x', bytesRingBuffer.FreeBytes);
byte[] tempInBytes = Encoding.UTF8.GetBytes(temp);
Assert.AreEqual(bytesRingBuffer.FreeBytes, tempInBytes.Length, "Free bytes should equal the length");
//act
bytesRingBuffer.Write(tempInBytes, 0, tempInBytes.Length);
//assert
Assert.AreEqual(0, bytesRingBuffer.FreeBytes, "There should be no free bytes");
Assert.AreEqual(bytesRingBuffer.Length, bytesRingBuffer.WriteOffset, "Writeoffset should be equal to length");
Assert.AreEqual(0, bytesRingBuffer.ReadOffset, "ReadOffset should be zero");
}
public void GivenAnHalfEmptyBufferFreeBytesShouldBeTheHalfTheSizeOfTheBuffer()
{
//arrange
BytesRingBuffer bytesRingBuffer = new BytesRingBuffer(10);
string temp = new string('x', 5);
byte[] tempInBytes = Encoding.UTF8.GetBytes(temp);
Assert.AreEqual(5, tempInBytes.Length);
//act
bytesRingBuffer.Write(tempInBytes, 0, tempInBytes.Length);
//assert
Assert.AreEqual(5, bytesRingBuffer.FreeBytes, "Free bytes should be 5");
Assert.AreEqual(5, bytesRingBuffer.WriteOffset, "WriteOffset should be 5");
Assert.AreEqual(0, bytesRingBuffer.ReadOffset, "ReadOffset should be zero");
}
public void RandomlyWriteAndReadFromBuffer()
{
//arrange
int length = _rng.Next(1000, 100000);
string message = RandomString(length);
byte[] source = Encoding.UTF8.GetBytes(message);
byte[] destination = new byte[length];
int readOffset = 0, writeOffset = 0;
BytesRingBuffer bytesRingBuffer = new BytesRingBuffer(256);
//act
while (writeOffset < source.Length)
{
int randomWrites = _rng.Next(1, Math.Min(bytesRingBuffer.FreeBytes, source.Length - writeOffset));
bytesRingBuffer.Write(source, writeOffset, randomWrites);
writeOffset += randomWrites;
int tempReadoffset = 0;
while (tempReadoffset < randomWrites)
{
int remaining = randomWrites - tempReadoffset;
int randomRead = _rng.Next(1, remaining);
int bytesCopied;
bytesRingBuffer.Read(destination, readOffset, randomRead, out bytesCopied);
readOffset += randomRead;
tempReadoffset += randomRead;
}
}
//assert
Assert.AreEqual(message, Encoding.UTF8.GetString(destination));
}
