private byte[] GetInternalBuffer(ExpandableBuffer expandableBuffer)
{
var bufferFieldInfo = typeof (ExpandableBuffer).GetField("_buffer", BindingFlags.NonPublic | BindingFlags.Instance);
Assert.IsNotNull(bufferFieldInfo);
return (byte[]) bufferFieldInfo.GetValue(expandableBuffer);
}
public void GetRangeFailsForEmptyBuffer()
{
var buffer = new ExpandableBuffer();
var tempBuffer = new byte[100];
buffer.GetRange(0, tempBuffer, 0, tempBuffer.Length);
}
public void RepeatedAddRangeIncreasesCapacityToTwoTimesWithFillFactor05Test()
{
// Arrange
var buffer = new ExpandableBuffer(0.5);
var tempBuffer = new byte[10];
// Act
const int repeatCount = 5;
for (var i = 0; i < repeatCount; i++)
{
buffer.AddRange(tempBuffer, tempBuffer.Length);
}
// Assert
var internalBuffer = GetInternalBuffer(buffer);
Assert.AreEqual(60, internalBuffer.Length);
/* Attempt Length InternalBufferLength
* before 0 0
* 0. 10 20 <--- increases with fillfactor = 0.5
* 1. 20 20
* 2. 30 60 <--- increases with fillfactor = 0.5
* 3. 40 60
* 4. 50 60
*/
}
public void GetRangeFailsWithIncorrectPositionArgument()
{
var incorrectPosition = -1;
var buffer = new ExpandableBuffer();
var tempBuffer = new byte[100];
buffer.GetRange(incorrectPosition, tempBuffer, 0, tempBuffer.Length);
}
private byte[] GetInternalBuffer(ExpandableBuffer expandableBuffer)
{
var bufferFieldInfo = typeof(ExpandableBuffer).GetField("_buffer", BindingFlags.NonPublic | BindingFlags.Instance);
Assert.IsNotNull(bufferFieldInfo);
return((byte[])bufferFieldInfo.GetValue(expandableBuffer));
}
public void ExpandableBufferCleansTest()
{
var buffer = new ExpandableBuffer();
var tempBuffer = new byte[] { 1, 2, 3, 4, 5, 6, 7 };
buffer.AddRange(tempBuffer, tempBuffer.Length);
Assert.AreEqual(tempBuffer.Length, buffer.Length);
buffer.Clear();
Assert.AreEqual(0, buffer.Length);
}
public void ExpandableBufferFailsToAddRangeWithNullBufferTest()
{
var buffer = new ExpandableBuffer();
var exception = Assert.Throws <ArgumentNullException>
(
() =>
{
const byte[] nullBuffer = null;
buffer.AddRange(nullBuffer, 100);
}
);
Assert.AreEqual(@"buffer", exception.ParamName);
}
public void ExpandableBufferFailsToAddRangeWithLengthGreaterThanBufferLengthTest()
{
var buffer = new ExpandableBuffer();
var tempBuffer = new byte[] { 1, 2, 3, 4, 5, 6, 7 };
var exception = Assert.Throws <ArgumentOutOfRangeException>
(
() =>
{
var tooLargeCount = tempBuffer.Length + 1;
buffer.AddRange(tempBuffer, tooLargeCount);
}
);
Assert.AreEqual(@"count", exception.ParamName);
}
public void GetRangeFailsWithIncorrectPositionArgumentTest()
{
var buffer = new ExpandableBuffer();
var exception = Assert.Throws <ArgumentOutOfRangeException>
(
() =>
{
const int incorrectPosition = -1;
var tempBuffer = new byte[100];
buffer.GetRange(incorrectPosition, tempBuffer, 0, tempBuffer.Length);
}
);
Assert.AreEqual(@"position", exception.ParamName);
}
public void ExpandableBufferFailsToAddRangeWithZeroLengthTest()
{
var buffer = new ExpandableBuffer();
var tempBuffer = new byte[] { 1, 2, 3, 4, 5, 6, 7 };
var exception = Assert.Throws <ArgumentOutOfRangeException>
(
() =>
{
const int incorrectZeroCount = 0;
buffer.AddRange(tempBuffer, incorrectZeroCount);
}
);
Assert.AreEqual(@"count", exception.ParamName);
}
public void GetRangeFailsWithNullBufferArgumentTest()
{
var buffer = new ExpandableBuffer();
buffer.AddRange(new byte[10], 10);
var exception = Assert.Throws <ArgumentNullException>
(
() =>
{
const byte[] incorrectTempBuffer = null;
buffer.GetRange(0, incorrectTempBuffer, 0, 100);
}
);
Assert.AreEqual(@"buffer", exception.ParamName);
}
public void GetRangeFailsWithIncorrectOffsetArgumentTest()
{
var buffer = new ExpandableBuffer();
buffer.AddRange(new byte[10], 10);
var exception = Assert.Throws <ArgumentOutOfRangeException>
(
() =>
{
const int incorrectOffset = -1;
var tempBuffer = new byte[100];
buffer.GetRange(0, tempBuffer, incorrectOffset, tempBuffer.Length);
}
);
Assert.AreEqual(@"offset", exception.ParamName);
}
public void AddRangeIncreasesCapacityToTwoTimesWithFillFactor05Test()
{
// Arrange
var buffer = new ExpandableBuffer(0.5);
var tempBuffer = new byte[10];
// Act
buffer.AddRange(tempBuffer, tempBuffer.Length);
// Assert
var internalBuffer = GetInternalBuffer(buffer);
Assert.AreEqual(20, internalBuffer.Length);
/* Attempt Length InternalBufferLength
* before 0 0
* 0. 10 20 <--- increases with fillfactor = 0.5
*/
}
public void SuccessReadAndWriteBufferTest()
{
// Arrange
var buffer = new ExpandableBuffer();
var tempBuffer = new byte[] { 1, 2, 3, 4, 5, 6, 7 };
// Act
buffer.AddRange(tempBuffer, tempBuffer.Length);
var outputBuffer = new byte[tempBuffer.Length];
var readBytes = buffer.GetRange(0, outputBuffer, 0, outputBuffer.Length);
// Assert
Assert.AreEqual(readBytes, outputBuffer.Length);
for (var i = 0; i < outputBuffer.Length; i++)
{
Assert.AreEqual(tempBuffer[i], outputBuffer[i]);
}
}
public void GetRangeFailsWithNullBufferArgument()
{
var buffer = new ExpandableBuffer();
buffer.AddRange(new byte[10], 10);
const byte[] incorrectTempBuffer = null;
buffer.GetRange(0, incorrectTempBuffer, 0, 100);
}
public void AddRangeIncreasesCapacityToTwoTimesWithFillFactor05()
{
// Assign
var buffer = new ExpandableBuffer(0.5);
var tempBuffer = new byte[10];
// Act
buffer.AddRange(tempBuffer, tempBuffer.Length);
// Assert
var internalBuffer = GetInternalBuffer(buffer);
Assert.AreEqual(2*tempBuffer.Length, internalBuffer.Length);
}
public void ZeroLengthOfNewBuffer()
{
var buffer = new ExpandableBuffer();
Assert.AreEqual(0, buffer.Length);
}
public void RepeatedAddRangeIncreasesCapacityToTwoTimesWithFillFactor05()
{
// Assign
var buffer = new ExpandableBuffer(0.5);
var tempBuffer = new byte[10];
var bufferFieldInfo = typeof (ExpandableBuffer).GetField("_buffer", BindingFlags.NonPublic | BindingFlags.Instance);
Assert.IsNotNull(bufferFieldInfo);
// Act
const int repeatCount = 5;
for (var i = 0; i < repeatCount; i++)
{
buffer.AddRange(tempBuffer, tempBuffer.Length);
}
// Assert
var internalBuffer = GetInternalBuffer(buffer);
Assert.AreEqual(2*repeatCount*tempBuffer.Length, internalBuffer.Length);
}
public void SuccessReadAndWriteBuffers()
{
// Assign
var buffer = new ExpandableBuffer();
var tempBuffer = new byte[] {1, 2, 3, 4, 5, 6, 7};
const int repeatCount = 5;
// Act
for (var i = 0; i < repeatCount; i++)
{
buffer.AddRange(tempBuffer, tempBuffer.Length);
}
var outputBuffer = new byte[tempBuffer.Length*repeatCount];
var readBytes = buffer.GetRange(0, outputBuffer, 0, outputBuffer.Length);
// Assert
Assert.AreEqual(readBytes, outputBuffer.Length);
for (var i = 0; i < outputBuffer.Length; i++)
{
Assert.AreEqual(tempBuffer[i%tempBuffer.Length], outputBuffer[i]);
}
}
public void GetRangeFailsWithIncorrectOffsetArgument()
{
var buffer = new ExpandableBuffer();
buffer.AddRange(new byte[10], 10);
var tempBuffer = new byte[100];
const int incorrectOffset = -1;
buffer.GetRange(0, tempBuffer, incorrectOffset, tempBuffer.Length);
}
public void ZeroLengthOfNewBufferTest()
{
var buffer = new ExpandableBuffer();
Assert.AreEqual(0, buffer.Length);
}
